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 0xaf75c5c0bceca6d35cb6733d3ee854fbb9c67d2d741c0e2fa6ff41ef4158c418. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a686c9bc-374b-47a1-bee4-196f830a49e8.json and https://artists.proofprofile.net/proofs/artist/a686c9bc-374b-47a1-bee4-196f830a49e8.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 0x1be605fe5a880c7a7367d93ec4121b24e2f8dca3a2b32fbe900218ce2514de69. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHN82413502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb765b2ea12d80583cbd505dafd67b5a4a4eaf2743147029fba73fde0040e3b80. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/QZMEM2084060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5834d9cc7e971e5bcc15ae900aed7fa77c0e3c933ada21cef7fed9eaae68174a. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZHN42478082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa617cd15f14bc7b6c5ef89754b8dc7dcf84f2e6dd408af60dee2ad1bff9e7227. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:50:54Z), 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/QZHN42478083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x795a366bb7b17d46d03b688d3e1fbe2115f4a734e774f326ca85d69d52f93ef4. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/QZHN42478084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3680d10c94f5a84a8ff6765412fa81107b80a8d6e965f4fc5a6805fee9e6819. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZPLR2203113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389f2690ce4630fe6f98a67aedef5de6d5e0a6c11489cd8c91af82a687a8a91c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZPLR2203114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b58ad17943173562ac4f81d542faaba46b179c6958fd3bf54efe6de412cc44. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZPLR2203112.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1a541ee405192883bc6cd369faa4c6bb6b86c14cc36db9f24f3016a61dc7cd. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/QZPLR2203115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x165469bb91f2788690278bbadb3b0a8a4b386709d75cc15386c8b7ea99385054. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZNWT2260356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da6d515b541d8db492aff2b482d8fccba2f13a0673b12edf587ed61e82d51c6. 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/QZFYZ2255831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe541c0e8eb0e8fb4ab0462de6d75575b94e7453c391e6bdaaa04f096cb0bba31. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-21T08:34:33Z), 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/QZNWW2005490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a93b33bb8ed8dd84b6068ba17a1e6a06c844fbfbda6f03ea89920648631fd87. 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/SE5BU2045575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3cd9fba5a118ad222564b9e2e1279b9237dbb44b55ce773464c90d3166a484a. 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/SE6A92048767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a6edb340b101b092f652160bab6796dfcbde2d6883ca8df839676271417a810. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZWFR2425912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa31a70ea150bfe6ce1c12d7b1ab18aadf150de93e76e13b3bab7797b5c95d6d9. 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/QZWFR2425913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c9747226a1a139b6a14018728bac1059af232b5cf63d052c6ec80f0d2f2243. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZWFR2425914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcaa250ac3b87632c134fecc2f76307700cf01350aee6b2bfa188fd16a0355e5. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QZWFR2425911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a15c5e5d85d458b15870090a998a8141b8909669e721b85a94efe2384875159. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/QZWFR2425915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c31ab9feebaf2299a5db52066eb84f73e8bd37e762d5ed399f9e7095c9bfa1c. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZWFR2425916.