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 0x7767ca19071b52167d06686f2428b65ccea4f685e1ebb1d384c791daa88c7f91. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fa6066d9-5d58-46ed-8dfb-937d780378d6.json and https://artists.proofprofile.net/proofs/artist/fa6066d9-5d58-46ed-8dfb-937d780378d6.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 0xc56eb1943e19bdd60f6e6c357b381f5a5a8dd09b5a668be216cbf58172ba27d1. 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/QZHN52586000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c328e9aaff6bfb7890b3d240771c1bc731d21f8d3b46ebd123bb13e3c2880d. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:20:36Z), 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/QZDA42527476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af8ae8bd7fe590703c25092132e26e20f9546158fd4e58ed4d3fc8d485a718c. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:34:10Z), 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/QZHN52586001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259465c34dd4eece02c1a0e8f1d921764aaf9fbf7b5b6d9101130f0246ffc2cc. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZHN52586002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d81e5f2d381a23ca36008e41cab5ac935cccda669976166be040bc400124b5. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:11:53Z), 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/QZHN52586004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36d9b8d4639e2737d4b3644396fa57a8c2cbd2b63b8440e26fddebfeae7ed8d. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZNWX2501761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b850e4c41c4e913191e707279faf60ced25354deeaebc2d108d9db88591a66e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTAZ2523355.