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 0x735ff888f59fe954cdc24903de5112ca9297e86922a321684c1e3f1582765478. 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/f2a18af4-2787-4a18-a82e-da8b7b84c3e6.json and https://artists.proofprofile.net/proofs/artist/f2a18af4-2787-4a18-a82e-da8b7b84c3e6.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 0x45646cee4b19d502650b9df16f2fdb6316f31336d4466af26b962f53b0794f39. 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/QZ4JJ1794167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e89f1036a5a7ab2bf111e93f6230ae59c1d0c1ef7249a0ac4f58489566b79d. 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/QZARB1897767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9ba307e9c6f72f562c44968ded44e375998e7862d14a75db31a5d64b1a1bdf. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/USA2P1905489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x063c0cdb24224d8a0619ef0933303298b32a93e9d010cf87c7952c031a5b5411. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USA2P1911608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7fc2705a47ad3fdfd5fd5d1d4bc5b7ca064d3b20f7f60932c61c03a3c11a8a1. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/USA2P1911609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb8cebfc7213a8297f678d4c96ae1e33e558669dc011fb4932e616fa2283096. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USA2P1911610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae10c01935ef0e443f2a0b1770999fa7cad35f0e6f2b5357b9d199bf022d7293. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/USA2P1911613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9058c73bd2058367bd1db70ee2d3e7fd562bfbffa40073e5829cc6f412588440. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USA2P1928771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc2f577262b6cb607ccb9c2fdd736ba862fd8efa7ba04f0167bd4f8fdcc172b. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/USA2P1928774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38078110e1fb55ec214c46e97a43868183e57c24a84f95cce794b5d009c19cca. 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/USA2P1928776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3fc71b0ec13229903fb0bed0bbd17d86970565a6023b099b2eb270b03379458. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/USA2P1928775.
Black Sheep (10 Year Anniversary Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a2bd6c5d792bca1f1692d15cfa1b3c1bedc416905f25ae96ae14b10e98325a8. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZK6N2351148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f5502954394012674e939ef71147799125d076a7be3a3ffd5b8fa988955eb3. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/QMFME2344556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac9e538301f494e5faaeae8bde57d9ec8b3fe75211eb00ef3c0e8e86bd52892. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QMFME2375506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f5502954394012674e939ef71147799125d076a7be3a3ffd5b8fa988955eb3. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QMFME2344556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90786509cbca72cffe3f87a1756498f82222ad3b9ab1089f3c39cb0dd2091236. 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/QMFME2344557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a4c63eb6b740086e0699719905fa4a3536691fd36c94908d9d0630a7f4536d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QMFME2375509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb5485fffe38153d6fc2337dc093ff3066276af649bdb2ec6d0e21215276b9f0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QMFME2344558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a71f5b3115834eaa9fc686da25abe4f2d37034bd45acf477dc7c9cf4086094. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/QMFME2375511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x502b58111d799cd627f36d178a08ea7ae68b621f4cb1ef9bd5c1e55281d33cc6. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QMFME2375512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4055971bb5a7c6bb79fa919307f696d1b6d349607d1e073ce6707f0701489483. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QMFME2344559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff794e0e1446d1899993882fc55e62e64e323325e972998f021634e9938a35fc. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QMFME2375515.