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 0x832f092d8b2b94b9b2c3ac0cd40a5ec49b4eaad34a4a09ad094b2bd9de68d0e6. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3d192ef0-aa55-4583-9658-344a2ea477b6.json and https://artists.proofprofile.net/proofs/artist/3d192ef0-aa55-4583-9658-344a2ea477b6.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 0x2271ac0a76a394c5910fc8215e75e6643a0d84fac9af25fae4e4e5c631aa8805. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ESA011608463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54327cff0268f434787054f8f6f0156ca0d92c205fee308b02f146ee271d72f5. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T21:00:57Z), 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/ESA011608467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a9e09285360a815a6e493f8ccb08ff85cdfb71f899b0a57a9feb1031f1d0d4a. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:41:16Z), 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/ESA011608470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647666a562e2ca282ab9cf0d384858caf218ab6d91a78c0eadaf4c9db27dcbcd. 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/ARC571600707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6997918b3167e62da6612a9aa9b493dc0f1dd098c96d9ef5692402ed256cb08a. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/ARC571600709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb8b8851fc0a173048a28f652eca42d8ee681e1c1c8f126117f991fc4ee6b29. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/ARC571600711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49d17810a5bd0b54e3ff8424750896d2f21b271af9cc4f86d321e071099d710. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/ARC571600713.