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 0xf50065bfac5e3a314385680cf3713c8a9acf770b3585a4a5f1ea391de03bcc3a. 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/1ee1b40d-3313-4cee-ac5b-2682bd83ddec.json and https://artists.proofprofile.net/proofs/artist/1ee1b40d-3313-4cee-ac5b-2682bd83ddec.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 0x352a229d28cae0f171df3b9dd3b2ed66439c09c6cdc73288b0d0b31d31e83279. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/GB8KE2405653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb4de82480901b0b8163ae3a71c1644cc153fcb094241398267ae038147074c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GB8KE2406261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x074825c7e68d193c0b5c5d44b888ebc01adb637987956aa4ea2d0ebe0963fab0. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/GB8KE2408561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd16bd57235d2c3d671f006c4602ba65eaff025ac82e1749dc1109a6372abb3e7. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/GB8KE2409049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820e240ac83fe939ae1d7343c5c25ac4e8248704e31041617bfaa8638585fb49. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/GB8KE2417451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d096bd2bc5bf3393b0c7c1dc4c2566b972cb2213e4c7ec9a5abe2d0e861c72. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/GB8KE2425934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4894f92d99a70c44a496e579a8033d7553eee853b9aa04db1ce3d9fe128360. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/GB8KE2426813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6689b6e91d239dd18b6b37a8195ad5d9549439352ddec679e4c753aee33eb04e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GB8KE2427170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d34e721b4db4b6d3d2ff8a4aab2b7bcba88095e2492594d52d3ac3cb3a17ba. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/GB8KE2428026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3626dd3526d36f5a530be89fffef208f5d3784012e316fe68689475b88fcad05. 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/GB8KE2503515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a393a593261275147dc0ff58cb69d98d4ff80b0e085808013e0fbeff518363. 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/GB8KE2510839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98876d4616c20ca97550c94b2be0ea5b72f1044a40fa1bf3c68fe21aa627ea15. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QM6P42588724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09df41dfac539a732b5aac03806804247a55b71ee0f381450202c7daffe5a313. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QMFME2501805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c41a41dfbf52880bbe09e41c2f51ad64ef8560e65dd77c570b8604f2afe67a. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QMFME2501820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb88e4210e1dff7630697105977497df0691dc229d5ee1f3f789d729eb06a86d7. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QMFME2501844.