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 0xcce3d661336247a21298cab60e1f9b04370ba1310d24d82c88d232669cd5af08. 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/fa106a85-0d0e-4c82-bf10-1ebc04da0560.json and https://artists.proofprofile.net/proofs/artist/fa106a85-0d0e-4c82-bf10-1ebc04da0560.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 0x074960bc1fdc60c7a6329e61907099b478e259c931fe4429884fdf44afb49e65. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USHM82113841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x451ab954155280a13c4dadc9bf1807ef84cbff54123990827e7b5e562c85e2cd. 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/USHM22370586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda73bf547d760273927186f8baa2cdf107ae3132767971e4ec0ef824e7813b92. 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/QZTPX2326225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d27fc287f440b6f85070a7e41ec7e1b88e12c1ffbd3008f76e8ffe27ce7dd03. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZTVM2321995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065474f4b99ce50eaf9dd91022028e0d0dd76ff8e8b808ef47cde52eca0108dc. 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/US7VG2494466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05dcb235fb3be77d113145dfe8720ea8ec456150c5a41f22840b94482227d083. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZNJW2432155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4986fe2da26a22d68dc2ba2ab954128065f557603cbbf98cd629eb4f661fa0. 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/US7VG2592720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5afb89fbade636edca4a6d296dd93a2919abb3f123f968a94b1b4d2195c6aa. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:40:24Z), 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/QZGLS2590739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9607105047f9b71b23a5e43e9025ca20872686983ea9b775043d19c7c21d0f0d. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:47:37Z), 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/QZNJW2520366.