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 0xaf166e39881879a3f0d16300fca104b264958c59925b82536ddeef212fb84242. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3b241334-1fed-45b4-a9a6-29ed002b2d90.json and https://artists.proofprofile.net/proofs/artist/3b241334-1fed-45b4-a9a6-29ed002b2d90.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 0x0f443169a44ea08b20f2a1f599a08489c44416e5addf87bb554ae4e1da037948. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GBSMU2596172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b6361844fef98599b989a73780230786b8cb1a1afd92d5c1962102808c00510. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GX8LD2458144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3135b65e9fc11e95a698409928b3d4d8e8b88585216fffce32371d1424688716. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:52:01Z), 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/TCAIA2438487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa92c33de006e4c72d4481624b915b18d33414a454b5eed3864c3fcc8c3c4c425. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:06:40Z), 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/TCAIA2438492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec9ecc064c2801e7c87b57b8949b9be3785a0faa383b4d79ac75dfb4a43ef9c. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAIA2438496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe244bb9d3257688c054ab97643e16b024f7797825f775aa49d543f6772892ec3. Chain 2 (Bitcoin): anchored in block 958351 (2026-07-17T02:38:05Z), 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/TCAIA2438501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95b335ebfa55cebab1a00997f6c27c878884be1020491e83e09bd02d50f8a90. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/TCAIA2438504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8148e528f3512bf93b2fb43de00db24c0bd117d8c2a95dad84cf35b013c70b7. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAIA2438508.