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 0x26dec244f5a5778424fea601dfe6032b6660fdc1ba73c8b4d4587abcdc7d2269. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a0d2d10c-1238-4369-8879-e3a37178cf4b.json and https://artists.proofprofile.net/proofs/artist/a0d2d10c-1238-4369-8879-e3a37178cf4b.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 0xe7df9f331cd4f67658e35d1e9485fd3593908260e9972c27bf5821f656320ded. 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/QZRP52205774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8cae91ca9146a64a6fbfc168ddce21b3983b83792667e4d1057085b942887f6. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:49:40Z), 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/QZK6H2572658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb0d20265ce43885c263c1dcf228e9c04c9edc7a3c63068b7bc46a7431de25a. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:06:40Z), 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/QZK6H2572659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a1abc4c79814a19b6bba822e645d8312768434c18c630a1e2cc1d5e02af639. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:57:40Z), 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/QZK6H2572660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bca6baa4109834daf4bdd664960651f9345531a437b5739e05b4a1dca4ed2a5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZK6H2572661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b0409058c7e28fc1c669b858e9ed06177d68ba125bd0e8482738599a141155. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZK6H2572662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d076ffb8a0b24e314449e36733d800ef8cb5b735a617c96eed15b513dfead8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZK6L2553833.