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 0x3309ebb068b1343b484389ed3ffe476ae6e5979283448ac0b052aeda5aa6895f. 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/89acc7a8-a483-4173-8fb1-d592400f1e8b.json and https://artists.proofprofile.net/proofs/artist/89acc7a8-a483-4173-8fb1-d592400f1e8b.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 0x2cac7515f1430a4bb52dd23a3a110cb729dca2462acaedc88882406c2f338101. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TRA162300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c7af25f81b31d3833d739dd8c4c7a9181ca5aa792bd96f1eb633487e6e25fa. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TRA162300195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe57def0cafb9b37592296074315ef688ab053286be394833facd35618ba15fe3. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TRA162400049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e0711f070159859216ccaaea5fccf2aa68327cb963e0de8195444c865b036cf. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/TRA162400085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a0dd602df646d1c1616a40d71f87efc6ce0b456c5aea9769a768d76587e9a4. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:18:40Z), 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/TRA162400094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac7583cbbb18df87fe40b957ad9d33a5b46daae59179661aec6fbbb42a5e222. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/TRA162400158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb874302d9c99a001c61eecce89828f73306dd11d40e53c506896b4ef08f551a. 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/TRA162400592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340272eaef79923053e42f3ecf1af9047c186fcfb2ab2bf539a22e33e54d3371. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:00:38Z), 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/TRA162400766.