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 0x31076fd581ebc947eeca08a5585f19cce566bb152577b1ee74851ec86bfaedc0. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c1125d3a-901a-483e-8392-45cef187627c.json and https://artists.proofprofile.net/proofs/artist/c1125d3a-901a-483e-8392-45cef187627c.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 0xca5ffb600107381bce01c6dac29a45ab7dbedd993c0033da49a6eb4e2ac9f8a7. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/CH6542287946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba80af0bc1e5464f6bfef0ae7a279336ebb2eee3fa84466aca04ab4725d73eba. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/NLG3N2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ca3de9df09fe4e7e16a3edab4ccb3d44143e0b241770f29cac66c7ca71c61c. 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/NLRD52203728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8db4f921415b5bddb7da4e34d503a6a32f367f8d970a0be65273440ab27699c9. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QM6N22350932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c89e75829a9fe6a358196b8222276094d20cdc30c95cc382ab34f75c52cc67. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/NLT2H2300460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5434285e1b95a404519e2ae66910d58446620ab18e885a103396c1d78bd492bb. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/NLRD52203738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0ce8c5cdef2dda314558ab2f8ea8f3b196dcec1237e774378f71e7041ceadf. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/NL8NY2300067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb16a4c224f7cc9b73c7147d80200c257c9563d48c6dc0c3a4295924e6336f0. 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/NLT2H2300657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01dae1c52f681c802dde9d94bf55a1bcf00eff743ba49c358ba041259fa995e6. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/DK4YA2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8372702e4b18c4f76c6f0e6dbe6986dce147497ad3b2a5c826810652f743ad53. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/NLT2H2300907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ce405a5ec3245ea3c9b4a2ef004012ad195688c214150084dc6091c54c967a. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/NL8NY2300129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce7522fd1d9b1710d6b3af33eef36ffd9b33639e1bdc5c9c432576e9114dd9a2. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:36:46Z), 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/NLT2H2301106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ff52fc627542ecde6d7386cb362a489a89a1f4219624593b1926ef20f4c5a9. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/NLZ8V1801071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a9e55f815cbc18d7c7431368e65e28242ba7b452e5e8f292d25767b1e4996f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLT2H2301179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58da80dce1d1a1e77ec2074788973f6f0d3aee29d63a9113372f72febef18d3b. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:19:36Z), 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/NLT2H2400163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5cfe48d0b57d3dfcd903aecf9f720c74e543a07ea18b830de3c8a8955b6aa4. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:10:32Z), 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/NLXV51300882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e72ff810652b56a8652cb7aad8a9fa3a897eb7c24f2640ab1fc1fd67568ccf7. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/NL6WK2400241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e42880ab3ed2bb2cddb9da8635e72cf4f6e6843e76b7c66459dbf9747407040. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CAHRE2500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2608908c35273a080eeefe4d3c9637ecb33dbcc97fbc4e54cf181bac46ee83. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CAHRE2500038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437194be2ad4cb0b5222e7d8f6911d8e4b0c9fa23f825126fc38fb82331b0b02. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:42:58Z), 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/GXBNP2504433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c61d65738921d64027f3b94c3add536e9a2422d05d1ffc7ba777e63e9b6e5d. 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/GBJAJ2500535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dcd92d83e1bad45ac9d74e6cb0e4c370f64523200679ab93b4b48ed4b3d1cb1. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZWDE2538143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a1889d9b6416628e8f5be0024e979a5b24486a19981a4e86538f27d5b79ab1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLQ8D2300543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ebb67baf5468e4e1558c6324b96bc8cc285180ec771a82ed017997c3da33d97. 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/GBKQU2397096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca1a8daf309355d7751a0f4c79517a99d5c904a4a9420eb9eb0f55b6546e503. 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/NL1ZN2302306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403cff8e1be3ecc8cb7e2492a2e6539414c0301ae5b008b27a0d447e61e5951f. 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/NLQ8D2200540.
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 0xd12d4c09ee00de6dc8f4723f334bdeddbf422617046c472968604906c2a1af56. 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/NLZ542300535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed69d82a618bcef8d4c16fc1932625c918a6de7c528877d3c359479a3711132. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/NLG3N2300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ad5604cf3b68b2ccdf5d2a9e1b00a69a938fbf2608c448b55d9f961d55e8ba. 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/NL1ZN2201877.