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 0xae67a73098c6f1f4bc2a1324f5dafa98c26d36a4932c01aac0fa18ceaa7a9ad4. 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/3a9ddeff-bafb-42e0-89be-ecc94b22d337.json and https://artists.proofprofile.net/proofs/artist/3a9ddeff-bafb-42e0-89be-ecc94b22d337.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 0xe0311bfc2817b500190957525391fd7b50a72da153f7ca20304ea0591aee4816. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZFYX2573094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5591bd2cf0d18989fc4dc33ac91c8ee0156a6d6938a218b973892c2c4d8faa9. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/QZFYX2573098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee12508a6401fff19cf3b28751394eb387b7d8768caea627f32d77df82680c2. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZFYX2573100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa12c8c7213562ceac395ccae6b6b6b2f8f14c2b1773620feb67f364d77c0a785. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZFYX2573101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e132a679a8ad67dc424d94565d7e16a4ffd730f6f5f574c1ce9424e1cf44f8. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:43:59Z), 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/QZFYX2573102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9799f808de028c205b8b0f74701855dca12d4e2de65d0b038296bf74582883. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZFYX2573103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d8db430f84651128281aa0015ebe058f235f0c9a207b8d6df6d853e9061dc25. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T01:00:48Z), 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/QZFYX2573104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7024c1478cf0312ca4cbf3bf5b77946fb904d14f862ab4fd162c0d3bd3b37b39. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZFYX2573105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd01303a6b51525a051953b4506c0cb9b0b82f953907204e34bd1cf7592346988. 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/QZFYX2573106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40809338c755cd8dda8a1da0ab9628cc3d058d2bb75640a6c4e16cb89b7a3fb8. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZFYX2573107.