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 0x6e4f865ccb55c95c2f0092b9cf2739dd6fed0cb8ed5b000e2ea887fbebb86c5c. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a51debe4-22aa-4440-9440-d57ca7181768.json and https://artists.proofprofile.net/proofs/artist/a51debe4-22aa-4440-9440-d57ca7181768.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 0x0a6ab6d18526150c1f36f3a3017e725afd7ed5f2acf776c18d7d0b3762aa79c0. 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/TCAFU2136142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2cf9a59ce996c2e1021bf9d987f49ec84db7168b99d19e7cdd8f2ef77a9f1f. 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/TCAFU2136147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e79f967a648c45887e46189c8083cfc5289e4f07419187bc834d7bf4b6a788. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/TCAIB2492777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e376fb47ae3ce4a71daf9fd3ff868913c229bb5d953036aeed241c9f266803d. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:30:22Z), 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/TCAIB2492811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7019a9f1d8035b5e7b765d71634f5bb0b2c010bd414d479fab4e2c12a0aeb275. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/TCAIB2492824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd82cbf490dc3df82bbd4245b0955689891cfcc4722796965b101f62f5633344. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:55:59Z), 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/TCAIB2492841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65722cfb41d60dc76d57c9776788993a70f03f32f1f8670064acc36642ada122. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/TCAJC2462643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7168dfbeb62145dd85e1d6097c31055407386f21ab76a9e4be371c742e82ca4. 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/TCAJH2594545.