1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x893cb3b812e9d8d58f781a9704dd333eba7ad6e086188e105e614afad2fc8395. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/30233fc8-ac64-4e63-8681-599d4d1c0790.json and https://artists.proofprofile.net/proofs/artist/30233fc8-ac64-4e63-8681-599d4d1c0790.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Christelijk Mannenkoor Soli Deo Gloria Urk
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96cce27603db9d92b07bb67adae3d7ce09dfdd1b5f67f1eb72ff59011c059c4. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLG620593556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3192bc65e2b47b68f3675208549b6a0ad86e084f69d05e4ce0751c8a7a49505c. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLG620593558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b57f8cb4c35fa6a23f89524d0060ff62d281792313cf3b73b544bbaa6733c78. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLG620593562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc91e800155e14df250e1c9acd716235ae3419740e86fd143c141abf76d941c1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLG620593563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595b754e2607f5b001a6aceeda943ccdd90806a24dab97021f7fd23c0b9c908a. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLG620593564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850db4ef895542993b6e49d6f3d4364608a71fc12fd417fa76f9689068e70606. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLG620593566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f310d3b07c0ec21004f5f401a0a2b4c2331d3869154c37281f79fd7717f4451. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLG620593555.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28560e3e6e61ae82eb697887b058644c04ef23dd35727c8caf0cff4246e5e36a. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLG620593557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c86b56847dc66fb6afe6751e9d0bb3927eca8d3c535882573d825b996d3221. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLG620593559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c3151e4a85e7ede077a0b718b476880288db6e3c1fd5016467750dfb15648b. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLG620593560.
Sometimes I Feel Like a Motherless Child
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x046ce1ae2fc773858166bef780a7cec272b809e4f629033ea8fa45de0067d4de. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLG620593561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ff9624eece9d131ab55881912a242295ce0d4203cdfab5fd5eeb8d65da4a8e. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLG620593565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29976a4cb2ccc3f6235f08b578a1c84073497ac468fa2134028f74104648a76. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLG620593567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83c0962b79a28d794e1da6dae961b5336f3495cb131e8937047b2a2ecdd84a4. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLG620593568.
Geliefde Liederen uit het verzoek programma "Wens"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5adb8b8256268da779c4665a922289340c71f6ca7cb63581a81f0639d81d061c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMBZ91613018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a0e0b9904c5820e46959328b6217b31aedad4aa61b07a4d7d29b1963a76088. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMBZ91613019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf696bedd44dd9a6253f286affb7c7ce38bf94efd82f2c1acea543af64359cc19. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMBZ91613020.
Chr. Gem. Zangver. "Vox Humana", Oldebroek
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f163a0baa33c7a53bb944b73b695a0832af4693be71cecdb34e5d4307283be. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMBZ91613023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x468119fee0ec4b2d66bea91f5df953a9a6254bec2f0645113ef00cec0319d07e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMBZ91613024.
Chr. Jong Mannenkoor "Soli Deo Gloria", Urk
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8829444dfd40ec223f70ef512e46531ac4a7b4e037cff8617520d15dd23f05. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMBZ91613025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7503bdcc49e7f8134c9396d295ed12d9f6c6f725804ab63037899f886a5ea755. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMBZ91613031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c953e33e905233fd76275b422cd670c88dbcee4e2092fc7efa3387326214b1c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMBZ91613032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41fca93699ce6fd070ae0aedfe61b176bdb3b246c110f94b8404652d02971a20. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMBZ91613033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d43aa9dc498288ebe8c6d680dc1227fa87da0f373a95aeeaa5e8f24e314c23. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMBZ91613037.
Samenzang uit de Vrije Evangelische Kerk, Nijverdal
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b0f268237e5c06a57c3900d57ca3333f70dccca3846cec9913ce47aac30f54. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMBZ91613053.
Vreugde, Vreugde, Louter Vreugde: 30 Liederen uit de Bundel van Joh. De Heer
Wij prijzen U, God voor de komst van Uw Zoon
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe01f72d156409b466ad4de741e200531bda9a50ea40c6fc6cfbf31a052593ef8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLC350844210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae13ea6f23285d1c410009541d67c6f3b06d3535dca70e9abdbba81185e0998. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLC350844215.
Jaap Joh. Kramer improviseert aan het Orgel van de Bovenkerk Kampen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744104d430c277f11d7c123a6e7368aea308a6b3fbdc0ac690b09b61f33f9792. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLG620613821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e39f95cbc15c5efd4456ab5ba106bf97d8a076a0061b865e51b69c63c5e2a72. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLG620613826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ef07bb228c55b55fe5a964878bb1a7b4bf413ca32a4817085f4d3418dbcbe1. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLG620613814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce496a0e9fbcc0bf107e35b131ac62447850c884c1dd6b8f9ff801e34ed7fee8. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLG620613818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b4ff6d65b6c71e9c2849c0df90c444f6d3e2c15ae54f6c7a48f6b3f86f1baa. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLG620613825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28785091ea8b63e7e5e01074e51afb58026a5776cae8f5eec9e5e3923b6b42c5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLG620583243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc976540d5c88338f0240532bc16c5a05b88349b667fa1a8bce550e45c24fe5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLG620583244.
Jezus is ons licht en leven (liedbewerking) - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8271823b473bae8ab6de07b4ca5dfe47fad200530d77f42fd91076906c7a011. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLG620583246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5dab90cc8b291dc67e86fe9125d7c14d0d8d74db345d611f1018f16c152cea. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLG620583247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1642654f3b62e9e0a1954d1146a88028b2da00459921e1d45b8940378bc4092. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLG620583248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ff46a2f6f30b76ab3de7cd1909a706baf45f7cf25dee8ee518ae84ff91afd0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLG620583253.
Wie maar de goede God laat zorgen (Liedbewerking) - instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15da9229422b32bc3f9e64b9c83d01a487110c2c8bfa6c2ac9a750842d34793f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLG620583255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e570dd5bf9f5c8b703b8b03a4c22ba3dddeb136c0bafc9a9da83d0ee4de7a4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLG620583256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9736474b63e23331c43a8ad7a977d3d1970b7df01797ba92320d2645f6f46b58. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLG620583257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784aef47419b12a211cff21429f6c1fcd223925cf3e355711cd2caf7e4f64424. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLG620583245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f7d887e23a8723cd2b9bcadf0d8cdccc39107462a198a51b88542989e70c31. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLG620583249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedeade225f51aca02ba2c9003f440c2355d5e98dfe51d9c1fc64c5c656290381. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLG620583251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x119b20a5319aae753b62e388f0bc9be04ed84dc106d7a42a1b6f340e4fa02bf0. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLG620583252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e2fedc66d216d20d605cec2bba8e71f5bfea5b9702d9a44ee86d2d81c919d9. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLG620583254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa841f68b936844aaad65750b080d177fe8995dcd4add2a56dd55d50f90013289. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLG620583258.
De mooiste liederen uit de bundel van Johannes de Heer
Als ’t bazuingeschal des Heren klinkt (JdH 490)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x272ca5540bb3c7ce2f66ac3de1b447ae6bb32b862427746b5231faa4ff1cf4d3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLH770700248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33223e0220b7aafc805fe151f04714d2e28e04cf81c92d1f2f18c99de5825494. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLH770700268.