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 0x65e54f91b7062262633cddf7c53d3cfcdd24295873c9235cc1bc8bae5fc7033e. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0274bcc3-cce1-4713-a0ef-59c63401d413.json and https://artists.proofprofile.net/proofs/artist/0274bcc3-cce1-4713-a0ef-59c63401d413.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 0x09c47abe43d044bb6619f8ac062a31c7874e5757552a900b89881def2d40a8b3. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:25:37Z), 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/QZPEW2501459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfedca22330fc9d672321f3f4343eaa0a354db5028d8b75739c463588097f4885. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZPEW2501461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534bb5a29ccbdcb1cb157c5635853361dd348f8708cf9b0567e174da909d29f7. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZPEW2501463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc93be8a1dd9d952f0c21b20e8cbb41a23dc66d3336c7756dadf4067b98dd8b31. Chain 2 (Bitcoin): anchored in block 958351 (2026-07-17T02:38:05Z), 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/QZPEW2501465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bbf3a106316a209da2afb28606e51631f95ca0df4ffbaeb179abe5b5de08ccf. 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/QZPEW2501468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e7762ff482f6cd713dd271dcd10f694bbf5310f5dc73dddda7673eabeca916. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZPEW2501470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8a065689c02ea70bd6eb3c8bb1d033194ce696fa96cdabc05e8ae4bd9d1a7d. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZPEW2501473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d2af317e4b0d0d8ffcec3dbced702e2f6b3f457375194e4e47c3052a79ba7e. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZPEW2501476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4ed77cc2080104c99747a273a5682bc122cfdace5bd05a61edcd8ece67a7cd. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZPEW2501479.