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 0xadfc63bdbcc0bf192475800a8f9a996a857dd37fbc99ad418c4e4caf91dd11e7. 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/5ca6019b-2fc0-482b-95ca-e809dd8e78f3.json and https://artists.proofprofile.net/proofs/artist/5ca6019b-2fc0-482b-95ca-e809dd8e78f3.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 0x982b6ae3ac6144cae39da2f989f0e27002c084c4aa16333d262dcec3303ad0b2. 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/JPVI00212020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a564ff097d50db38cb232d5a55e9014c88910db4dcf8bc9bb8a13b7db07505a. 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/JPJ901908470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ebabaea80b9dd6b534c38cd34518015cb06f5b76adc65008146fc63e11d422c. 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/JPJ901712460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2cefc4958743a8c140bfb726659a0a186c340e9a43bbaff5e54f6fe2c84bef0. 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/JPJ901712480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6f917f6a23c2dab75d6eaf0a6432cabe6034eae40eabcf6ac76f97d21c647f. 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/JPJ901712490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84cdd157f4bc3c8428d94dbe3af63b3b9668feff7ca080343bb9fe803346b53. 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/JPJ901422420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6defdb9d2faf43f3eed7602503619c42e3922c5d2506760273c0d8a45308020e. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/JPJ901003380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad72dde7351d026680ce12c909949455d0bde96bac419712f09ae37687cb9d0c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/JP92L2200510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7d709fc97869bba38fec77ef460a7540ddd218a4642e35c8160a43732ae797. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/JP92L2200520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5784f234356d5b0f145889711c8f1abad73c9664d4d91d654112c3d07850df17. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/JPJ901804520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcbbe8d0fe55ab4d6626eafac297fd94997a337441e37c150cda7efa2e69c43b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/JPJ901804530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db545fd9143fafad3e70d589a55e1c86f10c20aea86affe85ba6d24acd0b04f. 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/JPJ901804550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef27916f62db96311a08b5c7b1dbd760c3ca5bf7d1ee4dfc1011f9a43db9e622. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/JPJ901804560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe259e9675cbed3688c221a3d4b5f3eefb2990e87f573f49e4e4e8e203dd9a34a. 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/JPJ901804570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f2d75b0a419c576ac2a0339086c87535349834d48f54c64b33a6cb7bff0852. 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/JPJ901804580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda79665bc919e68f0d6ee5dcdd2d4f6273616fe6d9ccf61a51b9bfca4a0a5e05. 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/JPJ901804590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36122eb5825473bbeaa1548bbeb49c0897dd29fd02edfefeb00567b4eb3c8c6d. 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/JPJ901804600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d3679536311f0ca3d3bb44c24c56bea109830587133b30afa7c2a9eb4445e4. 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/JPJ901804610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d3852308c1dbb6462f78aa8c53f62eab9649e6d0d4f4e68cadccf2b71f7df3. 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/JPJ901804630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d3b480b95c6449ffcfd446361aea9e26e996430b71068556653c68a9b2e062. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/JP92L2425420.