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 0x616770366e9ad5effd854e814a18a3b85e57cfc1091215ba72e3a8187a78f15a. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6f574aa7-a337-4231-831d-c19bf2d9aede.json and https://artists.proofprofile.net/proofs/artist/6f574aa7-a337-4231-831d-c19bf2d9aede.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 0x361980df639b484bb845d5fa0b80e6697d621ec29210ff38f7e604f3156bb3a0. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TR9480100094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d8f3db4f8fddf8c857c90f66d6318776ed8d8c73228fcd586e95c2dac7cc6f. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T04:21:41Z), 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/TR9480100095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41143bd6457d26a776202f52e1cc0a118d32ba94fda1412fe386e30d1f8333a7. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/TR9480100096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b5dca019b06036220f4bda10410d464164627ad597404c3155c9446278cf96. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/TR9480100098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896b852882cd3d24e812a36963a117608f7d936df47f2d785c6204a6e8941095. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/TR9480100101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3695aff458d209e474da32389a9f108f1227495541dd3198c9dc2441022f3ff. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TR9480100104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x155c5959e5d0966770a0c7dc0e2815e0d6e247b880585035df3c5f32fcffba74. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/TR9480100105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74dcb0678e92a7409ffbd335e348227356edf6f5ad9bf130d28d385d4ee0fb7. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:09:29Z), 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/TR9480100108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf5283522f6886dbda1d6432742488ad9c6c9082dae3e9a890bc94ea5ced0e8f. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:38:14Z), 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/TR9480100113.