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 0x14970d736858de2ce1448cd3631135201ac2e985610caf4b98e17fc7f471dae4. Chain 2 (Bitcoin): anchored in block 953773 (2026-06-15T10:40:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c6d91d8f-e4b7-4b03-aea8-5d751258e4f8.json and https://artists.proofprofile.net/proofs/artist/c6d91d8f-e4b7-4b03-aea8-5d751258e4f8.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 0x8e5c66d0bb0e4a72f7ac9e5c13a61903a41e493928fbd699b7f9fe21b2b48d9d. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/SE6A92002267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc753f23bb4decf02a1d949dc2092d07426e9a69e2180baf46db7fb6cafc3e13. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:01:12Z), 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/SE6SA2080833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da6904b337a72b22a0d8b4af3eb22154b8122a7d541f2fd1baac28629553897. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-19T23:51:46Z), 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/SE6I32169079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcea97a6be4aa8e7478f7842f930b1caf07712ff881e4ffd421fbd352400e199. 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/SE6SA2089573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e11309447504c7db92f624695257b2f29601c10efd5ced04e4c36916e38cc7c. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:00:42Z), 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/SE6TI2106113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a2c533d4a88ddb679873466c2d995f311d38eb49644a856a7c1fc6077ac545. 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/SE6TI2106114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b32c267a3b2c51d8fd4b42ed8018f3fe62a530dfbb83f73ced8d29aecdbcffd. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:04:38Z), 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/SE6TI2106115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86d2513df730168a74a44292cb64eaeb95159464b73630a3dd67d79c5188996. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:22:02Z), 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/SE5752290690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e3de2531b5a0ea47de434cc5e81b03061b7c5931699b3e5ebbf7f8ae452dc33. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:50:50Z), 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/SE6QE2361672.