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 0xe4f2823781c77b2e7e54d5ed9a3caf306ca1e41e7069777fa143b38642411c8a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8b000f67-f1e5-40d6-ad2f-89355f50dd56.json and https://artists.proofprofile.net/proofs/artist/8b000f67-f1e5-40d6-ad2f-89355f50dd56.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 0x26f03edeef954ab1bfcaf70ccca705d7d51acc1a598ebef3fc3b3cfd9e7428f6. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QM4TX2200799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4583b0a852e0cad771e61f76ec9cb0d3b7870f2cc907982088ba7f75a7e5eaa5. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:30:32Z), 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/QM6N22295367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a8d177b8ec7f0d32307453cdc126f3ea14951d1db0bdc515b41580f58e7921c. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/DEPI82306870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d514b2a8d84f6b1114ca671d26d34b6b2b40f231152447fd6572bf89f41ae5. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:09:24Z), 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/DGA0L2398963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30edfcf3e655a761d484cf86827b037607a1d1fe3330ef95e53be507b7f0b5fd. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:36:17Z), 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/FRX202551278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4d5dcb7ded1d77f8668e1dd77b3f7b5811d0f7b281c35de0db0362cede847d. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:08:59Z), 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/DE1IH2500001.