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 0x86a9972d69ce30c22b51846fc812337d97c575e863501a0e121480e62bbda6ec. 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/0b94eb2d-698c-43ee-a964-c445bf7c6bab.json and https://artists.proofprofile.net/proofs/artist/0b94eb2d-698c-43ee-a964-c445bf7c6bab.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 0x80c87b16ac5d5a002cdb0a8dec3e4f800bd6949bbaea11287d3262cd5c68b789. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZES52089221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e3d6809995831d9bbf45927b5f925226e4204112ce81c739422b663e594794. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZMEP2077128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28863493ab297b2049ddac91d1c523d29ef1a42eb8750c08c0390b387850abf4. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZDA72133872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eeca9bc61a4fac10b5f6511b1bdd7b6d7359deabc78ec2666bad527e5060358. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZNWQ2199304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb3cfd2029bc93f41f88fa88de7d156848ff44c80d0be7cc77df9050e737b64. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZMZ92280479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd5a365338023090e5e69f392297012851b300b069d3df1349373eee5559ad51. 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/QZW9L2226736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49908db4abba54669feb4aa22e946cb0247499a49338b673c8969beccf571c3c. 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/QZW9N2217646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x615e1e1e7930780e54712a0742c3b6863aa1f1a024eab13413590b4e6627a659. 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/QZW9N2217648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b49e3a3e93ba231a0f5bf37e677848416f7e9f90a1b8e574c50bd39be26c027. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:27:32Z), 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/QZW9N2217649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10579d71f33539a233c54282c938d39812d7fa44ab1daf486187a4bab9ecb29. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/QZWFP2363200.
The Calling (The Local Sessions) [Acoustic]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e63da12c50cdf82acb488d9035c43759b42ba366c9563b0caf0bb3186980fb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR2X42208460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27739393ca1326f716943242b9efd6b8cc6d52c2db171388322deabe8d74bec7. 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/CA5KR2402364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784158b6a9c902a98fe16d5aafc9792167475eaa13c707db08dc85dbf69622c0. 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/USUYG1369232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784158b6a9c902a98fe16d5aafc9792167475eaa13c707db08dc85dbf69622c0. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/USUYG1369232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2773b7c7cc3f9b40a7396028ea15cfade84338961e0b6ec10ce1228a897fd695. 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/CA5KR2504788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2773b7c7cc3f9b40a7396028ea15cfade84338961e0b6ec10ce1228a897fd695. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CA5KR2504788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2773b7c7cc3f9b40a7396028ea15cfade84338961e0b6ec10ce1228a897fd695. 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/CA5KR2504788.