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 0x80d82d171b6048c5bf1f9ddb72f27852d86bca52ebfdc701e54956aa610d181c. 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/3e16f970-0596-463b-a2f8-fafbe2a6fe77.json and https://artists.proofprofile.net/proofs/artist/3e16f970-0596-463b-a2f8-fafbe2a6fe77.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6575751989459c9a07ab3b1ff6fd9abf6277ca7cd546afe30574eca0e2ae81e8. 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/NLHR52121127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5284df604b7dbd79da8e071ef63887a009d85cf5b691eb44ad609da36db0ef8c. 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/NLHR52121129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ca11550398c7d5477f32b48a4832dc07585401a989eb03aea135ccc2edf0af. 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/NLHR52121135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc53528827bd14022cb81d506f56d2151def5662a2860a66c80dfa239b04780cf. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/NLHR52121131.
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 0x1838e8c21468ca946e3bdf767aa57bc0f3b8789b2f90c685025ba57ce684bf5d. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/NLHR52121133.
"Maak je geen zorgen, vrees niet voor morgen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d74bf877ee84ca43dcf0363622e8ce55afa4b7949c730e925d12ed0563b9cd9. 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/NLG620617118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x467de22ddf274146996c78524d1f4f6bc9f0a69c63e5c132f3c527123fd7e151. 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/NLG620617119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf88f05fb8ee1a2022e6510c5e3825d853b69861a91b674418c46d1ce19ab870. 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/NLG620617120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3de6b643a5c3075c417e4204542ac2eaf318201abe1a51ebbcb830d40d1cb64. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLG620617121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727eb585873c35250b349a9d2d9bfd18c4ca3af05d488815fdd0cd3901965bbf. 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/NLG620617122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb120e0ff8b06abe00d3013647b5dc0f3e2e2ce765af8f35a0a548ac0f0a8f56b. 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/NLG620617123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddce765ea0eac527d5fec7156974e4a94677d49dbcb8e91980e1445978373b54. 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/NLG620617124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f7f9833219a0899ba756894b8030068da3724c3aa93af049e06ed45bddcc59. 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/NLG620617125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc36da52a2eeeafcfb262dafa90e0ace350f17549d89a0c59b56792a667e880. 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/NLG620617126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659718aba62140d610d86ecbd8b95a217ad45a6adfbdc427af765143fc84ca5d. 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/NLG620617127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7104988e72603f0dd1a069ff2d7fa2c2f336a01ff43e7f64e705cd33c8a64654. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLG620617128.
"Maak je geen zorgen, vrees niet voor morgen" - Reprise
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5395f526c0a8f6e0801519b953720f6a87bc1a571d2f54a4a368dd09dcb07cf0. 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/NLG620617129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010ffa6eb044d52261d74d99d64e0457fbea5f111a6c50fe2ff624d156ff2fc2. 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/NLG620617130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976c6882f4b48526b2553dc19b88032ddce4fb719a5fd822e189fa9ae8178c92. 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/NLG620617131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0147ba9457f7ae16c2b817567d7614bae31f5080d48e3e0a274feb70ea0f2bc5. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/NLG620617133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b22d3dc54afbd4ee5fbb0aa3c284b5cd80cb5da010d523cecbd830f186fdab8. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NLG620617134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d59f45ba6116c693b8612ca1ae607da11534516a3792859cc5a16f3e1c9414. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NLG620617135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1b9ed771463a9257fc7aa1053b7fe753036342233465dfd7a437561501a48a. 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/NLG620617136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x669ff72e188d5c12df6c398404e279e1244537e54e65baf268f0c21a7c0e0028. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:59:41Z), 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/NLG620617132.
U bent mijn schuilplaats….Deel 2; Muziek om stil te worden tot God
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18cdd8c5d037037d22c8d6ec2b459be5e0298bade6fbf9f40becd8d27703df90. 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/NLG620616205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9510ffada4058a239c4e7a6e7006ece0e804f41472221d164bc8c49135e5c634. 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/NLG620616207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0faa002ef0271b2a968a6246786b63ed2ba45a9cb3b003e3758b9ceed3f20f4. 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/NLG620616208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0194aff98b81acc39488fdd5137507ea2871daf9ba645826393c196aa2823ebc. 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/NLG620616210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d7c310bde950a42ece9d4d523d1cb74f0090689a543e0b53cd4208d13d42cf. 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/NLG620616211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e7ad2648f5256bc7f54149301d099c67b2d48625b1730e60ce6ed5d2f50ee0. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/NLG620616216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ebfb6f89944ecc88e249b9b81af7ba0381374bc06390e22f9112b38d6c1b0fd. 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/NLG620616218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ced117381bd4bb938b48bad458a9170329ec50ac6f4ceb01fd1b19b0509b1e. 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/NLG620616220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01a91422a68645b5dc92e239b067a1bf3f75a05b6c2fe7f2ae9c481d972b4a6. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/NLG620616215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2024f989fe95b7410ae4099c78eec4838d674927542188e434d14dc0c6f68f. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/NLG620616206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb2afaffb39973c1df2b5f1676c037a9b7fe9e00bc6e7982a876af802ce12cd. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/NLG620616209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177d6342eece41fe6e191d7ec3bf7e7f64beeb581212b58520d36b80c49b1ef6. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/NLG620616212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14dfdaf5246fc35635ee655664cb7fa3c096f72b838c58798af0b0f4b9717924. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/NLG620616213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685c563b9a698b985ce40ba069331a0689633ef087624df8aa13bf5ee6536a27. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/NLG620616214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9fbd4c777c53b8c22137d64f224564ae39cd4d6effefd3c0d58d431246c9f1. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/NLG620616217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261179e40de328162b84d790add68465ea82959fbbbc66cf9936e9e0ff8fae59. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/NLG620616219.