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 0x63e5e67ceed088b5b175baaba2293f402afcbd8c76548630c0c1904a3bb3e798. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b8b7bbf7-452b-44b8-9f17-dfadef6f7eb4.json and https://artists.proofprofile.net/proofs/artist/b8b7bbf7-452b-44b8-9f17-dfadef6f7eb4.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 0x396f47fc50a7576f67c0026881d09013532a25c75fb7a77eb6f4791ca3ebdd91. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:18:21Z), 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/TCAIO2494462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf163a9f7c0ab10f5d7308aa1c6155fbd6b2188eb4c33a1bd61883bf81b01cfaa. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/TCAIP2443533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0746ceebaadd70cd1722781d3003a14ea1d60fcae319d0e6fdc3eb214d8af73. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/TCAIP2443542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf8854d31a432de589478b071b139e312a86f6cf7e4c5f074a47d54291266506. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:00:54Z), 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/TCAIQ2443546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90207fb188843dcd6e324bb949ba8f7453bf9787bb2eaf22645f32a17721b57b. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCAIP2443557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0852571f646b6bda9dac246c5a9ac604a2c1a3d313bea7a7422c09ed61021953. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:51:01Z), 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/TCAIQ2443561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763e7faf353057df151203782cba5b0fa903b2259681c7b874137eb0544ed3b4. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:51:49Z), 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/TCAIR2488627.