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 0xb965699d381466c598cb66faa5741c59f8380b167598a3e67fe34983dd220255. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d8813322-acfd-46ec-b576-1de4e7d363b6.json and https://artists.proofprofile.net/proofs/artist/d8813322-acfd-46ec-b576-1de4e7d363b6.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 0x9520cccb2a4fa59f1fef13e5095c0bb222ad8c02e1c47629302f8be55a455f1d. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:31:50Z), 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/QZTB22438843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf508a15a2697dcb9f3af66d1456029f60d2ecd91645e76719d8f58bc63bb551. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTBC2498488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659c8c4e1c8b352a9774175f526ba340c61c0fe04761c0ceb592fb93dd870ee7. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:30:08Z), 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/QZWFX2425109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb677dffdc5582fda263816643af431f78709ea55003dbe4f61898e038f09d9. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:08:29Z), 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/QZWFX2425110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a7e1fa7ba69aa9f8e4c497d4ce266356dbedc4cf472808b4b51ff54b1af631. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZFYX2589315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a75321b3c8d9ae7fef51f6bc4a23445d659d0b719254eab98029de05eced6e. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:51:04Z), 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/QZFYZ2523945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87da737a05dd8b5fea61c4297a68c7ff326fc8c9a7243b9a02278c75f638d1ea. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZFZ42524601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8425565366dddf38ed3c8152f126f637bb77f6b04670aaf7b9b8edd69dd853db. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T10:20:44Z), 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/QZFZ42524621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e64888e0bfa96121216ff502aaf7be22712d9fa9da056206650e37e43152fba. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:11:20Z), 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/QZHNC2551776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9cf6d41a39b1d06813a620fc952548d90d420258c724796c63df59ad3cf3a76. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:48:23Z), 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/QZES92591842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a70e6d01a70414d47ba883976e90eeb152ad6ac85a875d5f678e80459b74358. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZZ7K2562267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e46560d548c6a61b96e6e3fab869b66f3aa135c31c670cef9ab6743c0478cf2. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZZ7L2563055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a70e6d01a70414d47ba883976e90eeb152ad6ac85a875d5f678e80459b74358. 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/QZZ7K2562267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659c8c4e1c8b352a9774175f526ba340c61c0fe04761c0ceb592fb93dd870ee7. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZWFX2425109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f50e1d267bae597f92f50b2eeb4b2e8056068b4d6d9d21ea1ccd4152b43d65. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:08:18Z), 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/QZTBC2519732.