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 0x23a68cddaca094c912a7f7a79aa41356c284e3cffd65f4532f39cd183b000286. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/20bf429b-ab6d-4a15-bc2c-1450c5ba0aca.json and https://artists.proofprofile.net/proofs/artist/20bf429b-ab6d-4a15-bc2c-1450c5ba0aca.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 0x4739c5e69b89c4a099b9c05ad9f9e9ca6b2b66fa224bada0b7dfd8ecd0415b7d. 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/QZWDW2351922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ad4dce284fae71b5bdd72e31930d1cfe7b2e069dfaca10fef7306aeb122be6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZN882558392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373f9a5e5b30213c6670434c5216092126236aa5b2b80adcb1f320baabbf2c3a. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZN882574845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6231bde80e2eff6adaaa9a3e427c553c2fe15c174c7ba5cea03a6fb106e9d6. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:46:24Z), 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/QZWDW2459229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9da47be01e80b6a6810e0b93b7aad4d6127b21e4c6f49040624271695b1dad6. 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/QZN882586891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59a055cd3c19d4f7f36274bf068e4fa7a5e0a59eff336bf9a7dc8e76bd87a712. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZWDW2489256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164bc90dd05c3ea460c52a0f8700e993bfbc06edb46a87e14fc8262e3f7e6cfc. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZN882586892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ad4dce284fae71b5bdd72e31930d1cfe7b2e069dfaca10fef7306aeb122be6. 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/QZN882558392.