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 0xcd9b18d8e5b7b247765aa27eabbe2672c114a3ccf5d93bb2abe024aedb8b22b7. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ff58e5ab-20eb-49ee-a8d6-82ba60841547.json and https://artists.proofprofile.net/proofs/artist/ff58e5ab-20eb-49ee-a8d6-82ba60841547.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 0x8242bdaf7446c056c471219b9a8bb1588f6376140a823b90dd74fd6d1ae8c989. 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/ES71G2433494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176a1539670810ad5ff151a04fbcc1b4d913c9d6a139106091d3962c632dbb0f. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:40:25Z), 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/ES71G2505202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f4372b037924cd816070ebe93c4f05c9a4297423edfd4e0841d63b2c0df3d8. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/ES71G2510528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6f988ac9fbac92c6cf07dedbb946385773ed7f28888f5b0a404b67d25cf07d. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/ES71G2510550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2320a53c9e7b71022c8f7c7e6a791b128e7ce99b59e6be19dc9de11874593d. 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/ES71G2510553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1400ffeef13048bd394200a90db39b6ca3508a6a38079225d2083018f90cee6. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ES71G2510551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176a1539670810ad5ff151a04fbcc1b4d913c9d6a139106091d3962c632dbb0f. 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/ES71G2505202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c9f079c2780ad60edfc6581631fb6b5bac520c078b81e192d18502caad96ff. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/ES71G2510549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15cac19d2dd320061b2b2be0d141482288479b5c4901174c95a1e1b266741b2a. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:29:30Z), 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/ES71G2425780.