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 0xe295fc0ee59952c003b65aa0a3bb8d18d4d2a9483ee09d4c3616972126b4d249. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7b2b8b59-57e3-4dbb-a536-53a2af07bac3.json and https://artists.proofprofile.net/proofs/artist/7b2b8b59-57e3-4dbb-a536-53a2af07bac3.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 0x86f02697d3b8488e617ce18ecc8c4f7e42ce9a40f4e3529eccedf3977ab03f01. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QZK6Q2151023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x836648ae3dbad385cce5546dd9666f902be980be3fbe7abf9a8bf374169d6df7. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:42:17Z), 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/QZK6Q2151024.
Popurrí Alameño: La Picaré / El Coco Rayado
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23916dc334a0dea5b24880d151846f07c5b07aff6d9e4e0aadc218eaddfedf2f. 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/QZDQH2384449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf1d63f3507243addbe2435f18e8e001ff9c63d5ff911c0c66083b20494c99c. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZDQH2397236.
Popurrí Cardenales: Belleza de cantina / Mi cómplice.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x486bbbd158abe067bcd4e6b75b359a045c0a1fc8c048851ad98e3d7936930630. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZDQH2410634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4af30fa56084dbb47930fd0bf53c862ecfdec4a4e8ce24007c3314f98bdae68. 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/QZDQH2413564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4692ac526adf92cc2d19a6b189370c0e1924a8535f528efd7057288f76a4df4d. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:23:15Z), 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/QZDQH2415272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9722aa1aa3ba0e7dd08bfe1fbdc5699e0b59ddbf5044808874b3feffa2c0c7d. 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/QZZ7P2445663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb61cea84cd01a075cb7029e1181bcf1317f4f77343067d45904297fe514e91. 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/QZDQH2506382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a14c4f58eb2b3177531825412eada6720d66cbb136992c60c7b3d9a95a7482. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZDQH2537605.