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 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 0x29249e3b3ab0939da7e8c5e6b971beed30b9b2b834f5e4d10005a25df7896b8a. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3630e12c-6d0d-4d0a-acc9-d1d72de2a184.json and https://artists.proofprofile.net/proofs/artist/3630e12c-6d0d-4d0a-acc9-d1d72de2a184.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x01a498de99dbc8de748c43e174f4b08bb85e5d2b2c60d0dcfaf8a05240048e10. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/NLE870478203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc757818b2dbd48a1bc978b3fbd8530c254301d43b656775e8f0e8ae28b305b70. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/NLW2R1706981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe922c89902c20316b82ae54fe6efb383d4f78cdfc6ff98ca2db4ef4c71a454c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/NLW2R1706983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ddab70ad78aa2ac5fe8d73ddb5935f31bcdf9d1a07aa0a366e994ff5fb6b468. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/NLW2R1706985.
Handen In De Lucht En Andere Leuke Liedjes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f819a3670f2a175bb48281745bebea8995e1f4163d08827be67386e7cb6829. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/NLE870812101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b3192634f27a452c8da25423e559968b282c20702bdcf27a2a2331b7032de8b. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/NLE870700616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f327cf7349395a6a2d3bc00bbdd0f58c7853d9e94ef411e9890ad5a440463d. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/NLE870405801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23d372f7f39df0e900a81177a0fd258e9413f3852ea412f3abb68fbf00e067e. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/NLA240906864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23d372f7f39df0e900a81177a0fd258e9413f3852ea412f3abb68fbf00e067e. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/NLA240906864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8690306092327a64a145623071d6d0556b0abcdf647eadb593fbd68fd1f1e35d. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/NLA240906872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ae4f929285bf88cada6260b31f698f86be2e56ef21525f2d037f4177069e39. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/NLA240906866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf2c80ae9231dbbe5fd4d533d3dcb948c858c98c33797e456019f1731e3c25c. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/NLA241007700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013f1a253acbc245abc084e71ab3a58fa90b161d8254252862ce5b5d6fc28d3b. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/NLE870702702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eed1919debc722df55f5cd099c9bddb8da807a79d2137f90da5c1cf6a2eec1a. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/NLE871265201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24dc8fee2250bef7dd6f342e16833128f7f05c0d6bed17e0a3c7e88449a4963b. Chain 2 (Bitcoin): anchored in block 958602 (2026-07-18T19:28:16Z), 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/NLSN51300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8802f13108320efed32a58266a9225969ab51cd028e45c4f9e24bbf5878829. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/NLSN51200012.
Mooie Meisjes Blijven Nooit Zo Lang Alleen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df4b0b37ab680842f22c4d66ed98f20c0e46fdd5a0008c03a89df308a3f992e. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/NLE871612701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22700827d3f8e894bd7f64299ebb1edfa04486d066ed7d23d907fce07bfe7f84. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NLE871714102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d13b23559acce2470a33ee549e325d164284aef7427cb898028f550b286cb54. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/NLE871419501.
Kom Geef Wat Kleur Aan Je Leven (Single Edit)
Proost Nog Een Keertje Met Mij (m.m.v. Factor 12)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87200ebc8690b784d0726f05f137546615fc2a9c8e4b1f66cb54fe4c70e0203d. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/NLE871741601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e26b4687f7dc643e2f0755a715e366aa426973bc02e3b14dc8a24b0ea22aae. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/NLE871916000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb8c245103db269c134e291eb6ca20c32becc9956003e52c1aad609e32305b2. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-15T21:33:28Z), 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/NLE872228601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d9ec422e31f92c6acb7d5fcbcf84a5999157748ae9ecf0718962293df122fbd. 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/NLE870476620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf8e95d1be04b31de601f00c689586de76592081a579215f8bda762fbf1bcc2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLE870702801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf405087c46810045d4fe90818495a5d14ea4a4c44608bdf376114b3568ea97. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/NLE872203601.