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 0x147516d7021276b9c39159c408cc4ce34b9946785f9b0c218688457c057e24f7. 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/b388a8a2-b085-4d02-834c-742d672bf8c1.json and https://artists.proofprofile.net/proofs/artist/b388a8a2-b085-4d02-834c-742d672bf8c1.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 0xe3ee650c859b03fdcde3c1592b9943ecbb6d8787c6406934f9449843a19aa3ee. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/US83Z2459629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1445e4e69b8cc644df9bee3fa633370f41bca4ebdd3a2a3a8390d544096fecb. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:37:08Z), 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/US83Z2476547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae5c95f2d61ee61e714177afed8b5d67622827c6022a493ad2cc1709f5c9c6c. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/US83Z2479745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0b1b80161bd9722b9b133aac647bf17cecef0d45cfc5c8bb371e97b00dc3b6. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/US83Z2482772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa3ae838b20beb7f08732916b347484b790f2c78f6f1d8a3ef8296685299ccbf. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/US83Z2482773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf56a6fcde83c50a5cb2a46e97ce244cd74bff8aa62bd085aec57af7ac195bf08. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/US83Z2498142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ce6a13efb5985272d91277ed2c22844c036a09d7594d17ebe847f33c92b899. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:05:47Z), 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/US83Z2498143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99693002a8ad7199ff243f1c1385924c7fc13a0818f727299eb903f8634b02b0. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/US83Z2498144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79103f7af2a589a699d71c263652c1d2cb7f78a43a2223f1b0b5a12678f2331. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:28:09Z), 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/US83Z2524646.