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 0xa80d37870fb98f50ba709194c4e7b03f959270fcacfc08a18ff11181f646e142. 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/782fce01-df1e-4d4c-999f-68e4b98de6b3.json and https://artists.proofprofile.net/proofs/artist/782fce01-df1e-4d4c-999f-68e4b98de6b3.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 0x47a04e8b718b7d3eb25b661436227cf714f2fef9be8115852bc37f6032e043ca. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:29:42Z), 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/TCAFK2148638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c6e594dc06a7c7851e537e5c92e1afe3faf3f84c89b9f734bea65c025f921ab. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:31:42Z), 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/TCAFK2148641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ae6496dab572709d84cd6f839a9b4e9491f21f058348916027042586fde615. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/TCAFK2148643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed1be3230b4e4d04f79a85837e4550eae847c4d51529ee460626e39b2923cc5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAFS2100784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5b55bbeff163efae2e5c713ee3d9385650b10160634c13c6680dee3ca0b0ab. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAFS2100791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081047a846bc875ab4ff3aef925bc34072b260e8a11cb16c635cd7c9b0c82dcd. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAFS2100798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04efd4cad9b2c54e1fe151bf0cd2cf8521ba1fb0a14005edac5c10865e4fe04e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAFS2100812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0fa9ab2b919a0907cf2566d0222d0901ea588ef3f9ab789623b7f13ed01ac13. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAFY2116268.