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 0x8b79466c4de8cdb1c47d426cf56b0ece33690029e43b5ba39f1e3c82acf2f248. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4670c1e1-363e-4ac8-90fa-a3c4ea178ff4.json and https://artists.proofprofile.net/proofs/artist/4670c1e1-363e-4ac8-90fa-a3c4ea178ff4.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 0xcbc744160142937c6ad869fc047e76c0741d875935f7cb567fa3bb0df066f9e3. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZDA51869081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf36bf14239c2f4ac7d5aac3f6288bd015c56198f808070bc68a2ce9eaaba1066. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZDA51869084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1b080a734984f7b8b05b5de550b4a81b4d3e3745b164c9d760894a6cec2549. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZMER2398574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83728972208ad5fb893ec28c95b9ebb26dcd4e73d5801119eb2a0e91dabe26e4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZMER2397562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa8d22af672825e3d7eab17f4aa39366a6505cf5f7aaf4f0aef8c4563b103cef. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:34:08Z), 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/QZTBD2467493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d6b2eae5b6a1f2170631a42e90e40de20b1d18e540059e4313f7587cc2b5998. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:24:44Z), 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/QZHN62506093.