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 0xb7bba8ce49b3d4be590cfc4d464d45bf88abfcd059ffc33d12065c9015ae3d21. Chain 2 (Bitcoin): anchored in block 954549 (2026-06-20T10:56:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ab4a3a08-69d7-4b02-b328-7a0d681cd48c.json and https://artists.proofprofile.net/proofs/artist/ab4a3a08-69d7-4b02-b328-7a0d681cd48c.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 0xf0e7ce074b556ec66330c14d0c669921776fce0871779619acc4b0ee4bbe8fb4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:51:06Z), 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/ES71G1841647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x461ca20a0416a72df0dd5904ed2859258efa74cc121f2afaf182898d6ebf9fa7. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/ES71G1621589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01084f4f46ef48911f9df1c0b432c20c1994360d7046d8f5f77f1c9d6f9f8f98. 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/ES21A1100121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded3435f9d929fbbec78bd6934703c1f48f339bb0a505f157eb376d80126ca5f. 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/ES21A1100124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8917b28183208a3a1d2b1b74ad0af8f9c4ec699fe042f53a28d4ec9365b3cb. 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/ES5590700061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eecd3642cb9e7ca7568232c3e2f59b9c216fd2946e68b225ea394fd2d06a715. 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/ES5590700063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c368c8e6453e5805780ecf3d4076ee645811df9afa6f79c7a1b1e18df05714. 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/ES5590700065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0627f9b5326bf7c86507622042e0940da3d6328508bcee76c28cdb1253e04af3. 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/ES5590601963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c3132d17551a708a71dc365b011462b32d3840b1273b49f927a5e63a63a9f3. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ES5590602210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58bc5fe6f90c159fb224694baa5ae904598e3f81b50a0e07af782cdef482b2b3. 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/ES5590602149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8917b28183208a3a1d2b1b74ad0af8f9c4ec699fe042f53a28d4ec9365b3cb. 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/ES5590700061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e53e23a21c90a40757debdd03d404dc075a1df07e9ad12d90c62a9ab14d203d. 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/ES5591100660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc34dce601ece1ced4d819270b239e7b759841ed79a70c906fd81f87f30b50e0. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/ES5590602543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7cf7b19f9178958c4be162276a0852dd80c2a52caa3e2b592d46226baa02c7. 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/ES5591400096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e5e2bcf9b67a4c1b7eab837460f81bc7393169223938ac3b4249394c9394ee. 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/ES5592200482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b330e536839285f0f86dcb4f8fb9ac8e6d675acc5307cc6df9be498bcfc9461. 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/ES5592200490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b0a8941b7279a30a312092fe67e333da0e6314fa179f1fa08bc0438400865c3. 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/ES5592200492.