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 0x8f626c6b69df151f008dbb5ffd3fd1d4235162a46ba75c9e3172d91e6ec54e98. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2859e722-e785-4091-97bd-315bf5520974.json and https://artists.proofprofile.net/proofs/artist/2859e722-e785-4091-97bd-315bf5520974.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 0x243875ca53f12830ba51daf2aaa0ff918dc36b74f958248e0afd04409e9c2635. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZK6N2243452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7555812035ed87872b3e15f607ea0ccf40046d14dd20e8840c47349df6301357. 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/QZWFE2355618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d0106ef9a75f9ad605761a2d2d96adda9c0e7f5f403d5f8a1a31321999cf1f. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T02:51:29Z), 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/QZFZ72484727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x407e4ac95d8d6436b49f39fbc1d269dee8db963ab4340ba304f2627a67e89106. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/QZFZ42573918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70be44a58f81b7405d057345b4d7c083604548a82df0b93b2d61a33e063f356e. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZDA52533220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70241bddee5568146b34cd796ab5e1f78558b6714397c461d848820749bd81ed. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZHN42520100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de8bc6c89162228cab4be4c535b9990a1ef2a4e6020dfd505eec6d2809548b7. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZK6H2570527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995d8572931a9c0a1120fe03c6fcea31a0db4794909ee65fffdd0786a8a8ece9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZMEP2566279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614e2fd996727ce711545c0a951d2771fd7fc3b78882b4ff208cc26c2c70508f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTAT2535088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aaef276c300e6e9a453f861db24f4920534da6a8026ce3fa9f9edf83967aea4. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZZ7W2564429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd3db9131e2cc1c6b25cebd7ae83e1393fdae91cc040c1f7203e2341d2528cf. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZZ7W2564430.