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 0xeb93b799fb2841bcb8928b313173a653bc41755301f66f5ed3677ff87970e661. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5316bd3d-4605-4168-bc2a-fd3bbe428e61.json and https://artists.proofprofile.net/proofs/artist/5316bd3d-4605-4168-bc2a-fd3bbe428e61.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 0x50605de6df43f1df2f1c0f1cafda740ab920bbd6c13aa0ef815d621c3428f10a. 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/QZK6K2385958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4864e3f2b46732e0e51a37b013f05db572aee74951ab6073a72bfd5c06e663d1. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:06:38Z), 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/QZK6K2385960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f860816f8e2a61d0b627f1dadf9761b7a1d19c960e11c8782dfbaa03802fcc3. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZHN52468293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4345af2963766f08ba70086544ff7d92f5bfd12f0a31abd2768cde5536f05cf7. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZWFF2443764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29041075df495ebd7d69631dd00e93c591eac35bc38f4a628f895fcb298a5fba. 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/QZWFF2443765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ba61746326e6aa0de5a74e1e11f1da0cdd94095e1b9984afaf2a069b915a8d. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:38:56Z), 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/QZNWU2449665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d985c9b6317933193bd0ed524caf35d77d1abdb72f6ba80cf9a49e459e554c. 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/QZWFF2443769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ad8521ee5372062a6bb842757c6626159635102ab9f10729c6f5f1971f80bf. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZWFF2443770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1378a225c4d72f47c727cd24791bf0f829a14f36b2a4b724ddf0cd7afb2626f4. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZWFF2443772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2279e69785d36e4fb67d97353845c53729ed88dfc5f681f5aab9739e8ee43084. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/UKS422500051.