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 0xf4771348e458d9156fa42effc435413af6b47974d31bd3623d7d94827af09767. 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/0cb3e35a-8598-4660-b5e1-8e89e9aab884.json and https://artists.proofprofile.net/proofs/artist/0cb3e35a-8598-4660-b5e1-8e89e9aab884.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 0x9ebc1062b03f817f8ffe1ec0a3ae7a4afd1a2a05356793c994a63f6378bc2865. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/PEBQ91401026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f5fb705efc525aefd4166c7ea229c28a9fa2cf4c3e4be33dbefe928533c219. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/PEBQ91401031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3edd58bada511210a9bf1331d6306d739bd3c46b5b379807a11f396350d954c2. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:19:12Z), 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/PEBQ91401040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89946a0af05dfc2c2f788f52dfcef96a7ae569a9c4e240c22e49f8edc3280534. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:45:50Z), 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/PEBQ91401041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9a2f075818ba7b4c92b820b89b1f858ff748c7a4b055fc4011e058e6eaa1e5d. Chain 2 (Bitcoin): anchored in block 958602 (2026-07-18T19:28:16Z), 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/PEBQ91401047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11fc8947e4c87c401f587ccb60f69c50be2dff62bf5310ac607d6b1747654ebc. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/PEBQ91401049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7b7534cfaefd4ac43dbb66065556e8e6978842e5209f45d3e161bd666c4a4d. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/PEBQ91401018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec7d2656d971afb5efd0897089202a8fbcc9af38c9943cfd566116009a71d9e. 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/PEBQ91401022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b38f5687194edb28178d97d78bf8bd117d82d9b228250686fc2da7ba09830a. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/PEBQ91401025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8db3869598536960f165e91609002753cc712f7c321e5f3ce2a96fd76ff7579. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USL4Q2019731.