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 0xe9ef51fe0ae1b22f0e33b251dce7c20eafed17f3853e42354e9556e14d6870bf. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9d9f29ed-7665-42c4-b1b4-8cf1ee2f9630.json and https://artists.proofprofile.net/proofs/artist/9d9f29ed-7665-42c4-b1b4-8cf1ee2f9630.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 0xd4b19988771590fd1beb5b4f22dbecc08a1d9191280b1e45a14d2cb1a8ecaae6. 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/USYFZ1452002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4777ef423459364614cae2db5cf826f4d2abe8e56640859d4e12a535464f8804. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T03:00:08Z), 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/USYFZ1452003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518770caee22ecd87cb3a653a3ad13ced156020313ed0ba57a5b574797b5ccb8. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:44:25Z), 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/USYFZ1452004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8a26a49a3f2eb4147793a5d4f4a4217ec8406bab688938c774a2677056fbab. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/USYFZ1452006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad7164ea7f52af155825ce61129ade0c7917d6bf1713ae0b87328bb85db6b18. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:25:58Z), 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/USYFZ1452009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b22a5f240a547c76993494341708c5b5adb5668092e22e4efbecbbcf621615. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/USYFZ1452010.