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 0x489dd931678155b19a76b053b1c6f64fc01646e58b649584106619996cbac7ae. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ff0138bf-9ae9-4bdd-8c60-608155702f8b.json and https://artists.proofprofile.net/proofs/artist/ff0138bf-9ae9-4bdd-8c60-608155702f8b.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 0x19207e5cc1ca83c6db64d3272b88d30f5929a89ba9bb006fa57483f8aa612d21. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/FR2X42090358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8680fc59916d831771dc5399162f4e5abda39b8209737c1a3007855fec9b70. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:22:42Z), 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/FR2X42096484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cbd6623891bdd9511e546e4d66d372a634a99af8c5be184616b1feecbf2e058. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:37:10Z), 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/FR2X42096485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x219e1d918a589eb7878a47ff68620950569ed47215d435edcd471bb8f0bbe294. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:54:59Z), 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/FR2X42096486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d211fd7d2f891b60d05b007fd8a88a5a91a5bddafe00d23f280c5eb713de16f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:28:31Z), 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/FR2X42096487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4465bb3f426241eb483b58d946f2885ec2a9c32c3d79eeee6698fcec9cb8c7bc. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR2X42096488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa689ed8daa3151b79501d4249e498399cd271fbdced4e457fab72ae1ba31abf6. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/FR2X42096489.