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 0x12e5e8da97ebaee69a9e494e18e86d86a54c5b340e8ab9a3b767ddc7a5c7b6f4. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f8d3623f-ed3f-46df-a029-4401f932155b.json and https://artists.proofprofile.net/proofs/artist/f8d3623f-ed3f-46df-a029-4401f932155b.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 0xdde955686c3543b71e311aff0384b57284159c8d34eb69a807c239feed30f2c9. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:09:19Z), 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/TCADN1881559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d2b4dda203e9315923d422af5f6f9ac29909fd790e91ba4f01cecf61a29c57. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCADN1881566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b13c1adf1dad67a94d4a0352d87ded9f08fcb0c965519ed280ab140ad1dabd2. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/TCADN1881568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd689b02d37ad8d65af7ba46f307abd5c95e87b3a8858b5146d190f557acc6c87. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:24:56Z), 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/TCADN1881579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8d917d41ed62185a761623a76b81bf167f794978c93a88d669b8cfad23ea201. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:44:27Z), 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/TCAED1931202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbcaa803114d7269dcce14d11a913819c7cb29b6aa133e4fb7c8715eb618a506. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZHNC2510907.