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 0xb9988f1dd1ea6a1deb52a09d79ca55434c7005fe24fc6e598f1c00e28a77a01c. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5ecc1ce8-1062-43ed-980f-4fdcfc57b4a6.json and https://artists.proofprofile.net/proofs/artist/5ecc1ce8-1062-43ed-980f-4fdcfc57b4a6.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 0x2b5825cb4faad2ff1f96c2c5b8f0cd5af494284d2d9d24bc504a072009c50d81. 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/QZNWS2466503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb088d55a43b847d940d8a011deb3cf760090c8b73f8c244365de97c676e1da5c. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:50:42Z), 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/QZNWS2466504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3986360585e901368dfaf21f8debc7518c972da1988e974ed4d7a95f320dda. 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/QZNWS2466505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd159e516c0f21475300cad0957dd7fa28d22b3bdad3d490855233c44bae49c7. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZTBD2416294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd446f859e9fde3a5ae1fb776eb386cf29ed2e6004ecd80a500d88e9430c261b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:40:04Z), 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/QZWFK2429030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf157c5f62ee8bd1cbe0cc95f859dfaf0d723e613ece7fc350fede00327aaec30. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/QZWFU2450324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb16b2a53bb162add1fc4f8adf9784a38257c1f257d987d827a6c86a42dacda42. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZZ7N2451987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6124ff3c7f4def57a2a921ad094f16ae90aa62596ae533708cc0ccfafd04e9a. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZHN52504935.