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 0x91041ecb6e8b7c72b0a13abb4ebf32455e68db96407691fa0dbc71c59a169652. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/18b7193a-62c1-431a-a354-12c99c270489.json and https://artists.proofprofile.net/proofs/artist/18b7193a-62c1-431a-a354-12c99c270489.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 0x8706b149d10d91ad8a513387f79cff8bf801cda50d6d33cb96a94372f6df739e. 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/USX9P0779981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6437a310cc0cf477b58bad5acc9e01bcabfb0605bb2e5ac66dcdca1b46418b. 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/USX9P0779982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab54b1fb49183db2c1e87d9acd643965a58ef0fff07f854e082809367c5a9e6. 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/USX9P0779983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e383afb04ac4b36afbd04a203b8cdcc4129dd07fdd2d36789328385b810d6b. 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/USX9P0779984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed68594fbee682d89bd8ac9b8f20927a7930d84d138c3fb5bbdb8232d076637. 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/USX9P0779985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044ca51664013a376d9bffc412f7629db90db60cf70d542012182df47e074905. 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/USX9P0779986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x077aaf2c9ef8cd41a4f8f4868df162942331e2eeb0f72fb38e6b66da2217ed82. 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/USX9P0779987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b13812ab7700b71ba689526a6fd27c6292c1be578d61bc4adeff8d3b87622a2. 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/USX9P0779988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35fc3398f425b7a733759aff3b96cddfb9c466cf046a9603f61db97cb75cd4f5. 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/USX9P0779989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3a3ea024569c65d2a2a13711f9188acedfeaf8425b1b3f5cb12fc428dfece1. 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/USX9P0779990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff1d4d6b54ad98292951f1a8df1d33cd484f754dc9e4539fb737a7f9a718ce2. 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/USX9P0779991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90fb24f4fda1b263ac46b3134badbde6c03bec6e925334bb3ad8b27612963c11. 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/USX9P0779992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6403ba3513c937b4fc673fae49c75ac92e0957b938030a94af2e7df22dbc8f63. 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/USX9P0779993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ddc66fc228dda04fcd407df50c4954a12fc5489e4e25f64a83bfc85a8eaff6. 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/USX9P0779994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x615ff5168fa856da39b9f130e0595d560de074d13e0930d07092d914d1872d44. 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/USX9P0779939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a9096d75c551e36eeb2b0c230262e09ff329a95556cecc1c0758a40725a0a6. 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/USX9P0779940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78652a47c2639746c8868351b25416e99c3297c366926c24a2549e313fea9c53. 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/USX9P0779941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c95a2e02b852451b449ca1985f753944f8def4deeabcf79c4aac30970f8a8f. 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/USX9P0779942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd2b70bf1c5b37b82e9fc6250e119871e23bec2170254ec9bfbca00f6e9887e. 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/USX9P0779943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61bc134929f26e58ab71fe9508b97a86eec7909d17818e9c839d94fa410f015. 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/USX9P0779944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c65594fea59ba8162ac7139ccf298358889c139fc6423d617f470c1063e3b4. 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/USX9P0779946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ff622b5a11857817b902286a39a3552da584bfee097c5712e667ff00c90f75. 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/USX9P0779948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471a8127fbcc8b6e050bd6db4a5a4dbe13cb486cc158177a672ae122a995fff8. 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/USX9P0779950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x072156066c9f3a78acf528067e988de05650cc5c8a3d54b345d126fad6f105f0. 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/USX9P0779951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa097a0dae15a725af415dd647faf70e1bd845ff78adaf14da52f66b9db0b2666. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:27:55Z), 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/USX9P0779947.
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 0xa93fe0c313cdf71e5f17bf43f8345f96aa125fc5ea69c311c7a4c4dfee8f55ae. 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/PYC842418616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa430b2432c6785323995d510fe762dbbc526c53e32b89c61ff4087b54562d7. 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/PYC842418620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6033da7069660def2972ba2e3ac8dd6bfc4e5a6f6510c5fd87c0f6ae0406888. 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/PYC842418622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a53d085931299f1573253c6f827015148dfac6165c06c7fa3b0b7afe523436e. 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/PYC842418626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91823dd8a6846924d1b6d76d1f80ed79bb1bbac02a6d2fbde810a982d3282101. 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/PYC842418630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc93484cb142056e6f346714aff7ebd694702df5994a9165ae3e4d578cf820435. 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/PYC842418632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d72872d93e4ae19ca0620723d5da684f67e44246639a9dbe76bd717dcb1282. 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/QM6N22040483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdfd046b4d1edf539dca30028879dc256563910244cae8ca442d1b22ef4c5d4c. 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/QM6N22040486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb4a5522664b6ec2b1d1c9de4c9e4bdafca04f96d0975196708d96a490c9fd0. 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/ES7931200971.