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 0x5de2669caf865b24b5b008f995b93b774697d8646e3b9c9a5ab3c4c9ce6ab243. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/017beca2-2b3d-4ccf-9b3e-976fd4fe94b0.json and https://artists.proofprofile.net/proofs/artist/017beca2-2b3d-4ccf-9b3e-976fd4fe94b0.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 0x785556b9c8ce8cd1acd46562d55604dcff7dc43f1c76e21586229df9ee84b0c6. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:44:33Z), 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/QZHN42573192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f25a842c42c776dbd18bda1f50b88d16688b39855def355242ee6f99aeb425. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:48:18Z), 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/QZHN42573194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966dee6346f825cc6fa0ca8f415e55df5f13ed19e88aeb5db194108bff4d9263. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHN42573195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d20f047088c5499ddaa04667bbca57910b6096acf8d69c8984998750310333. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:33:15Z), 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/QZHN42573199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ed3f8fbddaa287eafe17031e8efb9c8408f84d198cd04a020a7449e1ca5ddb. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZHN42573200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9270416771b4d1137725ba23cabd8ddc34f337e04f91e3570ab3fe17caebd606. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/QZHN42573201.