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 0x319f11cd12cc862ae775fd56bae2d1ab5a946d03f4474410a89d23c7d8e28d3a. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4e2a722e-f5bc-475b-bd08-f6b1c270ec41.json and https://artists.proofprofile.net/proofs/artist/4e2a722e-f5bc-475b-bd08-f6b1c270ec41.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 0xbf2ccec0c7b4e7e754b2235a093c0f4586fcf1e8f2ada5b8900a0448ba578c4c. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:00:01Z), 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/QM6MZ1513202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x836d4f190052cab5dc72ccb31637676380d46c7473e70fde63cac64c420f08aa. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNJZ2576388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x334cef52f0de8799255dedbb1f2dd3c8066f3f796cbc389748eddedbd9194ded. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:36:37Z), 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/QZNJZ2576389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9554bdd0c646292ca3f06192c6b0f0660c1b08caa27afe28b4498217b008083e. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZNJZ2576390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17150175d59866e3ab18ac5fae2764ee26b145cc753819d815b4281c74ad578a. 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/QZNJZ2576391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c0c5f9ece555da3dbd05843d649a92d9f0a07df14e4b85759e51614bfbd334. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZNJZ2576392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd1690506089762b54a9661297c5ebe24635ca8c51f91cbedcb93d5d5a2505c. 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/QZNJZ2576393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x349820cf909e61595b790a5040213d5cf812de09bdfd2bd6f533423c9ea6b74e. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:27:49Z), 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/QZNJZ2576394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad78aa25844437e53b4ee932e6438cae4bf50c775172090b9ec4d93c25bbad6b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNJZ2576395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f6d7b16e01ae6156f64b580b3e0c9f447303b6b9bff341e669485b931ae51f. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZNJZ2576396.