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 0xd11b309bf593419e361ca5ca65d56ada2d00f9e2feb5794dcd02141b4264a991. 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/629850f8-46b1-4372-a72f-aeca3fa3faf5.json and https://artists.proofprofile.net/proofs/artist/629850f8-46b1-4372-a72f-aeca3fa3faf5.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 0x4f205fdf85a7c382d85d093b83889cd2f66a4e07727ba531a207f2061c70afe9. 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/TCAHD2390368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da291c9de30e2e870cab12d428a13b1503a9c7ba8c29753b07512c3026ac358. 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/TCAHD2390382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac06ad78bdbdd31e6d4ff9f731251ed93f3980517fc6fe3031307c75c5632b6. 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/TCAHD2390445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e7a248747c2ec5ba5be6628375cc91a9bca66387c897855761f8cd03eb83d9. 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/TCAHD2390641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ca06ad0e73717d857e096df86cab59533f3fb1ebe397a4e6854db9e03f0972. 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/TCAHD2390649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4008b040b1849307e0d6ca09b472e8323af1d2a1e55b60870e601c99c588557a. 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/TCAHD2390660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed6128e9816461830372804c8c43f7d3d654924c6632e19d6bcacdf0bef4d51. 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/TCAHD2390668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb5b74a2f5d0f55dcd1711f0e5cbdca85ab9b59840a2ddf16cdbaf3addcc0fc. 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/TCAEH1979171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ee54eeec9941afddafe361d24676a452e0919911cd76ff37a05c80e7ad7e20. 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/TCAEH1979174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38dd3b63858bd298bd55c3a513303969d14b7b4383b03e17553cbaf7fcb36a4b. 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/TCAEH1979175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb721fd0e86d58aecacfb68960794de7fcdae3ee204942a55e468d21a18128a9. 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/TCAEH1979177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc98c3e60c99dec0a2fbf744ace80f7a6f958241cab56dcbea119769e22467141. 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/TCAEH1979181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa670d7f88c346926ac95aff96c931a093a3c67f5bf703910dd34c7d31052a949. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAEH1979182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340ef7c0cab4763615f8b36b6bb1777523099c2c2cd3aae9486535f5c5915c2a. 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/TCAEH1979185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347156c09f5e582fd046e49ddb99b34b03518cfe6f1b86252ccc0d46c398f021. 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/TCACY1748836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3b3e49db0c7681eb56ed98e42b492565a97b19a87e883bb6b030cac3d399b6. 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/TCACY1748839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac8cc9b87018d2660cc86f17114f3f9011ff758294a1183cde82fa7799aaec2. 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/TCACY1748852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f440e75f0d7dc69892bb9595585d4c52662ec8092762e03214817a1bacee15. 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/TCACY1748854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0e649dde0d4732097d33c5783f6f3108eded2b97c98c1a2a9812ab8f41b015. 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/TCACY1748860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0fcf8a730353ed2702dc263852e12c0798cbd7b90a4e17287b84021e4f1049. 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/TCACY1748867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76eb0622fda4d56c7456551315c20bed480f5784cb6c612ba948fc9d8d3d6e36. 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/TCACY1748869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60cd37f9c80491775d4c3918aaeb62ee7ebfe6f9a76e73c68affe20c22f6af2a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCACY1748871.