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 0xa36a8a95800d92a38d58479f74a2ca848dd026a81bda6b3adf98b7a930330221. 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/70f91aed-9393-4ddc-a597-7d56f4c4901e.json and https://artists.proofprofile.net/proofs/artist/70f91aed-9393-4ddc-a597-7d56f4c4901e.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 0x218521199a9b0d39c2484e9d0edc522b1c9d49042aad5e9fec11983943350f69. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/HKD012307229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d8e18623610f8e5b5a18050e850cf98594cf245f80019960cac3ae242426d7. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:42:52Z), 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/DGA0M2493724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea10f560df8b60b981763ad8cbe5357a1f888ad928c43999b7e0c9c2e517e860. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/DGA0H2490060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b956c9987de488a933a591a759f3dd239559c76348a14d0f1b40295c2afcdd. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:28:32Z), 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/DGA0P2484873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72e881c0decf9fd9ae8fe46d79f0349863710ec2a926388f7e56df025bff737. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QT3T42505028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855eb751a3ff1ba8d36fa299c1dda6dc947c83a500ece3a5848ebbf6ca75ad13. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/FR2X42575671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc65eb48616f20cecf00930d47cb7ab2adcc4446e9756d3bd0923f22b20dafde. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/HKD012414047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71497d2aea82eb9ed6e83742de897a888db6f6dc82762f0f3725d319db8d8d3c. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QT3T42514080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x055ce213c1933fb6f0e4dc97a070c2f5ac008ca5cf92f096a0b665b117461699. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/HKD012508518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95fdd8e4d64a3234a5ec1e7f626794538e00ee05da89602c85b90e3263b50880. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FRX762573844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd32563a15454362d5b5702d932eb2654919645cc8d9d837a2a6dbdfb8229244a. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/FRX872508676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a7587286aca99f6ad86269724ab0e1ccaf6d1f8b7de77633e4ce62d28aa676. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/QZWFT2553096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a68871e238e3685811adc50f25f2857e106a0d4ff40e0555e9c8208a5a74e82. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T12:59:52Z), 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/HKD012556648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf29d4a0f6980aae9c366f3cf82db0e14c095060b05d46ec29a3e97f37beb147d. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/HKD012598107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8c507f0bb13015d46bab324b2ab4b1a12486279b5dc5d30d72159103e8c0bd. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:10:16Z), 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/DGA062546888.