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 0xbf4ac103a7f2c738658dfe78e22ef2664a136fb49a148a9940454d044c80f692. 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/abfb8fe8-a043-4a17-8cd6-9dcdb534a3d1.json and https://artists.proofprofile.net/proofs/artist/abfb8fe8-a043-4a17-8cd6-9dcdb534a3d1.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 0x9d2fa4399de2a09b72fd3110ea701c817dfb2b6056bd2bddee6df57c16a5da3d. 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/BEB471500067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc801ae6e6a59ed5e3b07150383b65a2c4b05148b6cba80079793f2c2b6e58b19. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BEDS41500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149f918bf679f770cd4eae6146df7916e3ab886068f04707554849a97a138c13. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/BEDS41500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b70fd03a69619f07fba8971b524b3101bd8a4bec3787db8ba991a6e138d487. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BEDS41500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d8c13efb1eb309d5e505066c2e7b9ed9c1ca46d56720d036ef3aba7cd3393bc. 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/BEDS41500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e0fb537019cf567246f0904f54bc0309f9c4893b1984d8d6095285620ee6d50. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/BEFG81700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf062a4863665cbd698bfab061a91e1b317fdf307b6e06fd27c61b737812547d. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/BEFG81700014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62cea4c6ea604f3d4078fbbc495abe2bf539bbd95db0dcfbed91ef9b17dc514. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/BEIL21900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e9bcd66d9bb4a9992e4bb5ff280c4ee4ff0b5df8dd1a9aaac1fc4e272701f9. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/BEIL21900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63a5e77d8dd40cec6d205ece491ae07804dfe9bcbd02dbd2738a5da89451ce2. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/BEIL21900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e9bcd66d9bb4a9992e4bb5ff280c4ee4ff0b5df8dd1a9aaac1fc4e272701f9. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/BEIL21900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62cea4c6ea604f3d4078fbbc495abe2bf539bbd95db0dcfbed91ef9b17dc514. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/BEIL21900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf155e158c8b8b2c3fe41aed088ae89d2d385e10c3cac5916d6b9fc2ed456f7f. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/BEIL21900021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x944f07380cc249b453be1d5205977b6e1d7d36f2ac9bf5d6924f4a8940f4ab5f. 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/BEIL22100043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f4836e820690160d23806f15c2891269125b51c978d07003be808eff5f37d42. 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/BEIL22100046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6361730033c9382fdc54e2f760bddb5b5b0978906764a333b8413a5ca20af67a. 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/FR96X2448394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1599d443cc44f2edece613d50c95254bae3b4bf969d8a6d5ea7741f10a503374. 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/QZNWU2007459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60593723c21c0e74c6abd824b537ba1839af314294407c7ce8d0597e8a947113. 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/DECE71900920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60593723c21c0e74c6abd824b537ba1839af314294407c7ce8d0597e8a947113. 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/DECE71900920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb80f38c82ae6350aa5539d1444f5f914877b5cc3cff6c629b8c1033a7914b07d. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/IEBAE2100083.