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 0x0aba602dc36252b3b6c93ceaf86efc43a5f83f58529fbd9d5605b64bf97ad19a. Chain 2 (Bitcoin): anchored in block 953871 (2026-06-16T01:46:03Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/06c29a37-2110-4a4b-aca1-5f0cdf8b5418.json and https://artists.proofprofile.net/proofs/artist/06c29a37-2110-4a4b-aca1-5f0cdf8b5418.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Mighty Duke Classic Collection 1986-1990
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 0x89000526f7f4435b48193428d2ad0a744059fbee852f7a681b4e46c729e61a17. 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/USTC00919466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36cc523141e227e87d446cd8aa818e256ab1ba385ec03291382b3d83a2ea2a14. 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/USTC00919468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240157aac1f113e19ee8e9a8499a51fd251e35edcbff1e58826954c04dc1339c. 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/USTC00919469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6376ba91271fe2d2a196e45d8092f3a12e030dcc3e035626cdadcde06d4d92fb. 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/USTC00919475.
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
Muriel's Treasure, Vol. 2: Vintage Calypso from the 1950s & 1960s
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dfa72d1d7682f9e676bf0df7930a16fccc2ddc34524063586cc05e3dad0e96c. 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/USCXG1600027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263b9d9a28e414d66379abfcf7a659ebb77c8b7b3333bb5159b92a50fe2bbef7. 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/USCXG1600042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab8bff13387ccdf49125ce7e9103f75c64bfe4d8ef26ccdd08ea17ce1195e34. 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/USCXG1600044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x577d57fc589380cc5f8e41d5ba28cb7cc23dc139ae5274a2d74cb3344c4539a8. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/USCXG1600046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd04449183c28810a327ed2f6dd54f029dda9e12f0337800bcc860bad046315. 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/USX9P0902166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6991a9d0d49d03a8b7865a6389929f78d5c3acc6eff86e114d8f190947445b6c. 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/USX9P0902167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456038e8c46fd7a74c8828574beb1ab3eae37e877abed60a169153a379154f1e. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/USX9P0902170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f012437d105a804b3cd024c491d63b292f5e81b62d3cf6f63f6a6ad934b13b. 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/USX9P0902173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0cdcaa0e8c19b79909875e56d70449b4bdd76ab963bd0f1159299b6ffa16f27. 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/USX9P0902176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29359235f87f4f23718a6108f4347e9890fb2f0350b9dd7cf41e5b0f11c649d6. 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/USX9P0902182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2599b4ed78ca049694c832f1142b665033182088d47f1b869e418ec86b275e7. 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/USX9P0902183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2fa54fbb6a276aecdb01d7129a35b6f703f308b420b5f611928a9e5bdbe444. 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/USX9P0902188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de5f2e79801c5fb33194215584b96cd741ba41be9d307d729262dc3d5104b5e. 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/USX9P0902191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa66665ac1b7b463010fb7a5eadb1320c257bd71ff66a49d0610c793b2d048473. 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/USX9P0902194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d730dfa5d2465c683506c00e4809a4a9bcfead98b71262e83e3193863d8600e. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/USX9P0902184.
Muriel's Treasure, Vol. 11: Vintage Calypso from the 1950s and 1960s
Muriel's Treasure, Vol. 5: Vintage Calypso from the 1950s & 1960s
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f803046149ab80dd6129f6361e6e202f5fd8db00976debbb85f7e67edc45cd. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USCXG2000310.
Muriel's Treasure, Vol. 12: Vintage Calypso from the 1950s and 1960s
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b480b1876e745b022e9bd2c051166ea5da2b628d128c99ef3314f9e859e0c35. 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/USCXG2100768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5067367c72763fbfcb6ad71e6e7bd5ef924bcdf9a98c35444229c3bb0aa98282. 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/USCXG2100771.
Muriel's Treasure, Vol. 10: Vintage Calypso from the 1950s and 1960s
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f91de4a2202e72e5642f819205d6539d161683ac778a30353ac84514a049a3. 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/USCXG2100660.
Muriel's Treasure, Vol. 9: Vintage Calypso from the 1950s and 1960s