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 0x05f5fe170b05fa83a4001ab368915cf2a79c7abdc1ed3c4226b0b465632af69a. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7fb897ef-bc70-4172-968a-ecfc5224a99e.json and https://artists.proofprofile.net/proofs/artist/7fb897ef-bc70-4172-968a-ecfc5224a99e.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 0x87dc0e5937a8c25764b76dd7f85661b754247a6508b3692dcd496b73f92678d1. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZDQH2386696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e3c065d5826527b287aa6968b0b091951167d805552b9e6a956e60df7eb474. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/QZHN62483807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d5ddff1e86827e53d6ee765a733912005cc59dc14f61dd5a8816364f32bc954. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZK6K2413749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1fb2c22f416d64cb54d1e50c3fccff1b0a18fdff641dc1fb084ac659f2b1bff. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:18:35Z), 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/QZK6K2413777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x318c61ae86c437ba4c49b7fce031137572118ce4daefe991e7d99a461abcd4b4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZZ7L2428030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a334646f17bc4a044bf1aeffe180eae19da258a18c81299175bb6ea05a4906. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZZ7T2429435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9650383aab2fd7741c81375b4ec5eca84016df2a17f46f6cd1b35f9fe7d51f16. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:25:33Z), 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/QZHNB2554428.