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 0x909cd08ea0968c34979dd4fca38356e8287cb1e4200f4534b9eb0bd509400258. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6b0e728e-76d3-4b6b-a3cd-ce1f24224426.json and https://artists.proofprofile.net/proofs/artist/6b0e728e-76d3-4b6b-a3cd-ce1f24224426.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 0xac66ad1ea6f66a8b6f42a7d63f142d8da273203543a3506b91d7873b917ec6ef. 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/QZWFS2484792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c511666c5aa937425c8debc5e0c5e507f5ea5ca59e94afcdbf401e4f7a559ec. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:36:23Z), 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/QZWFS2484793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb229c9300d6c57c98a8223caa7e6228afdcab11f6fcf8482d05790883189aaf3. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZWFS2484794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e01d3ef40afe4dcd0448f3a57ee6a8399359254d9977072810f54470ca05a3. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZZ762495496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7072ce3603862467a7a05ce99073c3dfae2d592cff07d6ebcaebbc702a97b25. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZWFS2484796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe3de845e4663010207c0f33170f547bd639f2b88ce61da6128697226b1fe7e. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:23:30Z), 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/QZZ762495497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130a254f7fd455fd05369b3436147134f1544c84d8adeebec1d4b1dd97ea6761. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZES72550330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f15f0b8bcfd7075c4af1116f515d6f4876930b99be90a09d27fca5d1f0316af. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZK6L2577337.