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 0x265e341779f879bbafbbf9a5991f719440e713a6db110756710bd8b20bf2406c. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/506464a2-d896-4e4e-9648-e7187b15c03b.json and https://artists.proofprofile.net/proofs/artist/506464a2-d896-4e4e-9648-e7187b15c03b.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 0x699b580849682033c26e7f51d2b2cab8ff259d00d26492d2c13255489ddd64c0. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/NLCK42410678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c8c7af98c71e29bde1a0e63a10b90f9077403be067b28b0276db5d2c5df5cf. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/NLCK42410679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b08366512696f8408f5dd88386771afe44d6208e7d812501e9498318c015bc. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/NLCK42410680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ac375e4f502705b642fbb7704c8744eb32b19bd3bdec96cb3ff2dd375a609d. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:05:55Z), 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/NLCK42410681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5717dc39a7fc2ec2d748caf81da566861403564b3d269abe9570631d7dedf53. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/NLCK42410682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86eddde62f90860e9d06fedd5f2bfad2c204e85116dca67d7f89c090be1ce5f6. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/NLCK42410683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf0376bf1e414db0be92ce6276b652fa726c54914a0ea63c7ae4dd359323579. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/NLCK42410684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc729af6d3ced9c595e83877407296a5a68dd7bafa75df2d908b1c783629b3272. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:05:42Z), 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/NLCK42420248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2973eb80a8f2f044b666dd2dfdfb6e6cd6b0b96e13fb2118787cee96525c26. Chain 2 (Bitcoin): anchored in block 957752 (2026-07-12T20:53:32Z), 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/NLCK42420249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21af35837934092da9a1322b79a9b3c43f3cff6ff4cdd0afbc9f8899fbbe8796. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/NLCK42420251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce5e0b36a2a6f4000bbdc920dbc19bde5dba7ae6adbb9d4d040cf4a7a51cba15. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/NLCK42420252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5978f5eab0113359acc938eddadb8bd0f01a6066934635d03fb925ef52eae8. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:48:04Z), 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/NLCK42420253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04af556afce995cc6966afab8c9d447ed88619febcdffcbbfcf0ec3f45ea200. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/NLCK42420254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f9491935dc0cd0aff9fd8495f1b072a0bd19166b6cb60937f05fb216a33ad2. Chain 2 (Bitcoin): anchored in block 956426 (2026-07-03T01:37:49Z), 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/NLCK42420255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5ea69ab725ec96d257b83af1d68c05656e07fe2789b77d1dbbef76aa114d14. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/NLCK42420256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9614df73987b674df63eb91745d8a1805093d3cb3d6e947a62c2afa5076314c5. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/NLCK42420257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe34d5c28a305bc654ed3a51f0587945e9242c5a58a1eab7553be481e427bd1e. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/NLCK42420258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c08205184a598f1681911092e56e9ee67e973129f9738537767c5b47a3d6c5a. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/NLCK42420259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38cbbc363614eab33aefb12a342648ff7a0a28ddbc12e0e95313490a5fea4008. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/NLCK42420271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0280785de906623fccaf2f294b16e66a87bbfe1d0646498c185587a207e463ff. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/NLCK42420272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05a8905cfdf7297af23dac93e4ff49e5f64ce142a67aa18e79ed9fa03b10acc. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/NLCK42420273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b6a7a5128fe34b98e5392c329b2f1691cb5e6cf59899126671538402b0e8bf9. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/NLCK42420274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b21b6d0cba0ce11ce5fa6b15464b43f407301e848b86920dd5e5dd74688b99. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/NLCK42420276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccecfbd81802f129f97c9e4426bc2abb2f18e9fa48dc7bd8d37fd53a1dcb1964. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:49:35Z), 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/NLCK42420275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3492b490db7dfaaeb9f57739b20a54e45d2448fee24ba69294022b1446b8e50. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/NLCK42420277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ad04da81c34ba1988e0f4cb31f991cc0a201ebd0fc8d94867dab3bbae5e48b. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/NLCK42420278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5008bbc437c2c50c021113c30a6b01f231c0d6c5891de0aebf8a39cf0d92d5f5. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/NLCK42420279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282fc455fd2556d44f51b71f0b6c55c258b10dbb6be34f69886c24f4f9b02a5f. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/NLCK42420280.