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 0x7f7898f6f61d6d72278a0def16a8e4cd897c75077a997001c0f96db001c1f58f. Chain 2 (Bitcoin): anchored in block 953638 (2026-06-14T13:10:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/38c1c0d9-6b0d-49d0-84fc-e471fdf7f050.json and https://artists.proofprofile.net/proofs/artist/38c1c0d9-6b0d-49d0-84fc-e471fdf7f050.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 0x6d675f2781d2c9fbf6825fb9cd1a0e3e199ab0621e43a5cb34f74d70bf1e6038. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZDQH2392902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76937841891eb75ddea181f666452ea0b04f5b50dc37a9b32dcb342592f25c84. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:05:45Z), 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/QZDQH2410710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e100db1a868a5a3910e51fa893ddf99369416f1688ceb18b422c654b0261b27. 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/QZDQH2419958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe805f0738597221dd399511e913655c9403f477c81ad9e9b8523b67d86005bb1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZDQH2424669.
popurri cumbia sonorense: El caballito relinchon/La vibora peligrosa/El Sombrerito Panameño (En Vivo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f3a6d26af76b055a5fda5d6791b636a1563894549e9d0377e881d65d01b1fc. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZDQH2424678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019cc43924a171a65f9f3d6ed93e0e574fb94a49a2d2a2528178f6e904bb87ee. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:50:17Z), 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/QZDQH2430826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef00e3bab875cf59dec159c10cc449d90e7e80211402b32be7770bb36be303b. 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/QZDQH2534958.