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 0x0bdca4fa580745cdc090849a6a32c765d96aeb722d422f8927827f536b99b11a. 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/3df225a3-451e-43af-a01e-4183d37772f4.json and https://artists.proofprofile.net/proofs/artist/3df225a3-451e-43af-a01e-4183d37772f4.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 0x1e08919d3e9a93c7f82ee75644ff897578c49bb5bf89100cc47f16b53a25e1ee. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/UKFB51600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9421a6497ff9dc1c2975f5f281524268544c0998b3985926c35189e5b5274da. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/UKFB51800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d1aee422656acea5a4b3e96ffb4abb5becba616b9b59cfec150492b5e2379f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-19T23:49:10Z), 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/UKFB51800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4a5e6030a976a28698d2490972d62699be5e662462ec96e864c40cf117fdb7. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:09:11Z), 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/UKFB51800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x393cf48ea8c9115ca4db99ef8487be8509575f2c0104daeecdb67c3b7ae1abc0. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-19T23:49:44Z), 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/UKFB51800013.