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 0x1cba8fa80cc068853dc7a47daba8740d229e8b3269ad7aef46c3fb31aa9412ac. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9c096cc0-400b-480c-b642-6c3172921c9b.json and https://artists.proofprofile.net/proofs/artist/9c096cc0-400b-480c-b642-6c3172921c9b.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 0x43477fcfd083cfd681b7072b657a78546f055be77e677dd11024c59e4c448196. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZHN92163598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8ef50fdebaf998dd6f8a28215a441ad630043327ae734350641fd05601f015. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:23:16Z), 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/ISB112410206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfefbb7211670a1f689f44199e48f1a09022d11546119ab2d0906cf722afa4fe5. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ISB112408801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2f0288380eec030e818d35406dca7957211e110520e80f75c48be75a27da5d. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/ISB112406601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f1afdbdc57bbe7ea80bcf6563dc64d8aa358d7de4b486c9e477a22b61065d7. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:50:44Z), 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/ISB112410205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8ef50fdebaf998dd6f8a28215a441ad630043327ae734350641fd05601f015. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:57:18Z), 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/ISB112410206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6019bbe8a7236103da001901ee31492fec7aeadde312dc2d615da4a6e0d92f35. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:27:12Z), 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/ISB112503201.