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 0x92e0b4c47b5c4c2db11af5037b15b4400350d893e38e13d21fabfc0ab98c32a7. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/82bf7921-ae81-4c53-91ce-effa7046cc92.json and https://artists.proofprofile.net/proofs/artist/82bf7921-ae81-4c53-91ce-effa7046cc92.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 0xcf6b39184c0aafea0f84a2687229144e19daf56293f9a7a324f3b8c15825d37d. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/AEA142200823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e7ed6b59ca84deff02486325ab1a56b1743d99333a3e469656a361aa9050d7. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:23:58Z), 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/AEA142210439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8257df6fc03e32b98adedcef4e9dcff1b89332eb6ff5fa28003de095e0ef1f6b. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/AEA142303088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5faf3f5141aace2c499257eda805f851d6dc1ae1ff9fbeed32cef43d2d21baa. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:08:28Z), 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/AEA142400072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76057b2f4cba8f23f594a73f5db8c2ee0ac3b7e9d3b9fb99701d1cfbf8f47ec2. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:49:42Z), 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/CAQ8S1645830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83310a0e1ee02f2a19a863b31e2f1860e83046c374e04d888a4dbb98d64107f9. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/CAQ8S1646270.