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 0x6644993ee7a4c9935c36a63ef6b6bd3225cb55eb32f9ffe33b9f9dfdf9ce3374. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a4f57112-bac0-43ea-900b-f4c154a3e48f.json and https://artists.proofprofile.net/proofs/artist/a4f57112-bac0-43ea-900b-f4c154a3e48f.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 0x973362b09476520fce3c7c6f079bd4886244a81a369f2b8cda1b1ff9410f7ff6. 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/QM6MZ1557020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54f98b54b9c64d5f59eaaeb7e832b2327322f7a93b831da3a740e0fa3fd1982. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QM6MZ1548227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdefd527c2f715eefc09369fba16e24cdc2343d3abb68377c38dc9bce104162f1. 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/QM6MZ1548232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc439a3ce90ca341a12ba6a80fb0be3020fe60d870e99a8aafe6a053ea8fd8c3d. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QM6P41536858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe73ae1aee10859ece613e9c59575c496f4a9ad8e3bf9f51700e42e60b58dc6f8. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QMBZ91530541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbbd125f0aba71c158d40a60e78821e89b8630b46c420bdca796ab27c00e17af. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QM6MZ1548341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59203769cbb7dd732e672cf6ed23db6b4bd0e5300edcd4df6b4e0a62a08d6b72. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QM6MZ1548345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9a8ad251d83a89505395d689cf1460320497000c480c2fb2cd8c2f54bd2e46. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:09:50Z), 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/QM6MZ1548351.