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 0x2639f05e3262000196ea800c4cd945bc3adc10787ee86392ac927227dc2d82cc. 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/25d2ad3b-beb0-4900-bd42-d4e4df2f21ee.json and https://artists.proofprofile.net/proofs/artist/25d2ad3b-beb0-4900-bd42-d4e4df2f21ee.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 0x694772d170906d50f7866d7b75fe8734e610769c1a3c60a5e27c995375773775. 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/DESE51600210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ed97382fa019c04040bd19d29d2e37c8129f7db318d265142bb9f406e85d3a. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/DEWG82000320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ed97382fa019c04040bd19d29d2e37c8129f7db318d265142bb9f406e85d3a. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DEWG82000320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41fc3d1e361c674e158fc50fbfe9f8827f006df3fba00deafc4aea2b6e4fed48. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEWG82200259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ff058a28e76952bda30ea1ff44f1ee08f95ac9aa64613ae330640bd80730d5. 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/DEWG82100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b41b4f72be1fc5ccb075f2d5411977cc1c1e67db93f576225195ba7bab7725. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:58:02Z), 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/DEWG82200260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff4d396b6f40fed92c7c4fa9b131153a344a085d7b51ed52f5f4d5dc9eded04. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:54:51Z), 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/DEWG82200264.