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 0x4661a9c29019bff50c076d0e20b66706b590a962d780edd72db1108948810a78. 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/f7e10839-8317-4908-a3d6-d3b93d9c7612.json and https://artists.proofprofile.net/proofs/artist/f7e10839-8317-4908-a3d6-d3b93d9c7612.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 0xfc2e0de653cbd676cae82335de81655d5684bc0d3ee9c9cd437ee67d60669277. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:10:04Z), 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/NZCR01700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eedf2bfda4a143d3f20b429c1f1de5ccb1541b398ccc88203256e738ce46c5d. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/NZCR01800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ce3488a212a43be296914203834d68ff6a1308ea51d2e5db1fcba1df2986e0. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/NZCR01800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5917a5e65c145731ad1e755181762db5ed87ce7de97cda0f9ec8070d9b28d4. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:42:07Z), 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/NZCR01900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09215f1c2fbde50212f9237dda31d65338f72f1dc45d8e4ef3f8f4df5baae04a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NZCR01900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09215f1c2fbde50212f9237dda31d65338f72f1dc45d8e4ef3f8f4df5baae04a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NZCR01900002.