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 0x30072b0b14e893fb99637ca501c366b134283a7d3f8cdf839001d46c4b05297a. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f6dbf9f8-5707-4502-bb13-2dbadb08127e.json and https://artists.proofprofile.net/proofs/artist/f6dbf9f8-5707-4502-bb13-2dbadb08127e.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 0x3958b035d573642660c38e7025c0bc2e64b73ab5814c03832b3a836c1c8fec37. 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/QZHZ32178305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d473a22607f485bf0da70ec80878720bd9d01df2ae159b50152b14512073766. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:47:07Z), 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/QZHZ32178307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db514158d8b9806db6f756563773d791b5ec795bdc16036270fdd884a98b9fd. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T05:29:15Z), 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/QZHZ32178318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47dc8d2db7de7b836b7564da55acb9b308173db744dc2f23b13dbd382ef4d802. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:09:45Z), 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/QZW9M2300194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5ebabea0f8c99939e3f68ca47c6d5eb5b8f2d3e5b99a3e7bcac8f8287f4833. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZW9M2300195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2d26ef9279142beba3135af9ba5171e81690f0317ecaf749e58831bd8872228. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:56:21Z), 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/QZW9M2300201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac8546c2e4951d8e46a3ca7e766741c1c7e8604a2ca89272897103f012cc4cb0. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZW9M2300208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd76ef89bc499afc1ec7c45241ffcc39c727dd9757ad6b8a22f1d1f3d6dac28. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZW9M2300209.