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 0xa51dadb308a471e33e88f0b3aed1f1f3e39ae0cf26331f0693c72d6e6ab90be3. Chain 2 (Bitcoin): anchored in block 954650 (2026-06-21T04:51:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dac1436f-7fa5-4002-9611-a49cf2135bcc.json and https://artists.proofprofile.net/proofs/artist/dac1436f-7fa5-4002-9611-a49cf2135bcc.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 0xc93dabe4c25347c135195e7fe82c4b3d40ca0a9e3e0a1ccee991cccc61fd3ccb. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QM4TX2432722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4b4ef78ee15c6d36fd529842e6982ec58f94681f1c0b9a3f99a58f83e0d0f2. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZNWV2590184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34d17dc80c3b4cc3a99e5fcf197a10c7a4e17220a74fa090732b8ff3ed6b374. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZNWV2590185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95336677374bb810536b08a3b6aa063a1a93c4d93f35653ff94dfd829f69788b. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:23:14Z), 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/QZWFJ2593834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2437e1edc5b8ca1468db1a32556e11a737e06a6f7b30458fbf3e84fd1e98dbdf. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T04:56:30Z), 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/QZWFJ2596247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaad2a9326d812fd5793bfeab49fccae1376f229278733e3ebdb3ad24925a925. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFJ2596249.