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 0xe339aa050a792fe127525dfcac351695e9f57ffc6adca03828a2e741ee29beaa. 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/62d9213b-1800-493f-8159-a6bf319df827.json and https://artists.proofprofile.net/proofs/artist/62d9213b-1800-493f-8159-a6bf319df827.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 0x9929fa0933420937f5c1cf317db6d3a0810413a0106a7cc852aea29d01dc41ed. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TR7802100329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f2ccc2da8d87906c00285cfb91222e992395e8107a6c0df3d60849d5cdff43. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZHN52407075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8bb3ce1b439f7a44d67026d74346c0642b1b722c53dcef6238c570444d61b91. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:45:52Z), 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/QZTB52426531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418d276cf028d938f72ee50d7241b1daf295ff67bfd2188793a65e4abf5d1801. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNWU2482293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dbe2552cb853e2502fbde65547abca3a7d455d12299ebd86e9df1c8cc197449. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZTB52427301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9417129221dd9a8b41fc48d7c77ecb7e9ca976ef544be43f46905b9c10529d4c. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:16:14Z), 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/QZHN62522253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe473557fc0760ed3005e0e80a0162402a32faac844df7357a52d8d1a354f68b7. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QT3F32551139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f9101e4fce712d603aa9f18d45dff7d6921c9f4d21f71d9409eca9ac5ddaba. 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/QT3F32551142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccfde29130580aca395a76d7da8c74999ca385628c9a53756cadf71fa15a1da8. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QT3F32551143.