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 0x15389b0d64964337386ce97c63b45d6a15e8cfc2bf42b49dbe3183368b64468a. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ec752bfd-ff81-45ae-a7eb-2022e59dd9da.json and https://artists.proofprofile.net/proofs/artist/ec752bfd-ff81-45ae-a7eb-2022e59dd9da.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 0x5b4a9b50acd34e358902a8e74c690be02848e937c00b87319888902c01878586. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZWFH2312574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc60f4658573e5ac54345722aaa691c91919a5bf729d432d8f6d4b2f418562b72. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZFZ22415701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05eafa283c39fe7facce8f81a3119269d936587a99a0dd908cec0729fb2d92cf. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:10:20Z), 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/QZDA42498357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3707f9e855e2619eedd3b5ab68cee2cc9a4b6598aaba5f9853ae2b813e3d15e3. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:38:06Z), 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/QZNWS2442061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61c95280aa255a9a18ef093a55074af37dc21e982560829cc61af4f61848fa0. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZZ762473513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd644350a51e578385cf99f0c9fe0512edce4b5f6640648c507dbd7c1527980a8. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZES52586028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ae59e9e4b952af6e269af404d97eef03b4b2f552ad78a2631e24aec73b6075. 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/QZHNB2592505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2140469966d1eac30620dc516b22cda2e9c6374b33d6ece3e8fdc5bc43d0bbb8. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZNWU2518975.