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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dfc1a12f6641f0f9e0c3d7c5a863e986a95d36523ccf65232c51e6c52948346. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9ae4a061-5f88-45fa-851f-a600406caccf.json and https://artists.proofprofile.net/proofs/artist/9ae4a061-5f88-45fa-851f-a600406caccf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
if i look back when i begin to leave, will they remember me?
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c720c70c9f03536a2530fbdf801f9ffad9022ac8ea1439557b9e9492d1960a. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/QZK6Q2015501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c93bc463ee82a66dc0a6d4af42c7a336cf09219fdd3473ae3432555c3401f5. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:38:40Z), 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/FRX762133988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16111c4e248d7b3a39364543c005e3f955092101e2461946633cda362c29a014. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZTB52211516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd3d6ddc9e4ef34fbae8b298ed3c1be22383b31ed772e99b6b1ae690b81ee689. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:37:57Z), 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/IDA172232003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16111c4e248d7b3a39364543c005e3f955092101e2461946633cda362c29a014. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZTB52211516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e6dc771b84a5e09dcf96c787ce34cd3a90e799baae5fc71ecce6640af6b18f. 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/QM4TW2577462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x828bde2e89b77ca4b2b2fb44431fc05c8bf2e322dd3561afba1b7e2a22f5e1bc. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/QM6N22580049.