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 0x25b78212dec4b024bf9b4f4997363afee9af4d3f10268382b080e14d96bc7209. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c202c863-e6c5-48f1-b849-2d1e8579e507.json and https://artists.proofprofile.net/proofs/artist/c202c863-e6c5-48f1-b849-2d1e8579e507.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 0xf82d0d82e4eaaae12137b9e1654fce9202d17b2b9652ee896748578c671f2201. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNWS2467244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51d527328223b9abe344bcb1e20d927761ded2feabda3b15ddf4059fbb002937. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/QZNWZ2414689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75de988dc3b7701677f5a7206806a65ad0663ea38fd56aff153c287ea405b578. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:01:23Z), 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/QZTAY2482608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ffe945ab07336ab813f4769ac98e2a926108856b0568d34ce6b04461e2666c9. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZRP52533889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2887fd87011bcd86de9f8b0cf51deb4c1c36558eff6252e7e3ae4f3850b3e4c. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZNWQ2518856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2e09b90bd739fe52d424dc730035f6b71a2c0b2105863701ff8c4a0fd93373. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZNWQ2518873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ebbf6958c936530747dbc6af1d32fd76b1db473007a6fccce37cdc6f32cae9. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:57:16Z), 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/QZNWQ2518878.