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 0x35411ac226a5847edf99337dab4100e56099deb9245d6cc6738f44f6668ddc9f. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8d53cc2a-dbdc-4248-b0ea-6f1cf988703f.json and https://artists.proofprofile.net/proofs/artist/8d53cc2a-dbdc-4248-b0ea-6f1cf988703f.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 0x7e7e93aa454d8b0f539ed6e6b4848666b7197eb2eb8cd7322685756423aa0c47. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/AREC71600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4581d3af213256fdc4fd60ffd4580a42e90c4b0485b9eba34638be18cc6f4a9. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QM6MZ1994896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12781f539faff9843bdb10f612563a92659cdef71e9a02e1f2c1e9d8583dd2d0. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QM6MZ1994905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86efc4a727c9575d5c02e8581f8f786ce2fb9b3d920a04ea788d58c8ba60c165. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:33:10Z), 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/QM6MZ1994884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f54a73eeb578774b7167fad3b8558ae0f183ea47da81bfb89664d7a120a52f. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:02:37Z), 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/QM6MZ1994971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c82e5b3118a48b193ca1f6465c644fc1fa193a402f9145908ac11475c38c29. 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/QM6MZ1995136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e014a230733625a2bd33c34193e6bff9cfada3e504bdbdda85b4fd84d933d4. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM6MZ1994968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a11b24e1fc5f423e6fe497765866ce0f1171a51d2caaffc666b1ef4432c5bf. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QM6P41896275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9effbb500db5579f29c9ab523807bdb55627ed9950016d237f19523c902d58a1. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:34:22Z), 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/QM6MZ1994885.