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 0xbc54f553824fb97d2d97a20306d737c731f7992c54bd4ab0d415a872f34e13fe. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d0197dc8-f032-444a-bf13-84f902bbeaf7.json and https://artists.proofprofile.net/proofs/artist/d0197dc8-f032-444a-bf13-84f902bbeaf7.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 0x0cb3f15b418c77356aa4d0fdd5dc7cf2407305429f255b1453d738777854565b. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:20:42Z), 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/USDHM2024046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a8ca59580fcc162fbfb2485e667f9b0fdb75ba334b67edb3b20cdc018eac523. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USDHM2023851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a8711a1504196628054bfa3679adf6c898d250e5ae91ed7d5da387bcd20f7a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USDHM2023856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802107c7edcffcfb9c4013ada1c4897fdbffc982ea61e5e10e2c36f16f3835f2. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/USDHM1526220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d18e6a2fc587a42601ae794f8b8eafb0b6d8550226c9165bffde36a537c206. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USDHM1526222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6150b3395ccea205bb25fcdaf2e4b230e8f976813f1be89bbc2478d19f80d843. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/USDHM1526224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79ce3c9e4cb3fc2109591d8afa6dd11495caf8c0c2a20d86333844c35af5248. 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/USDHM1526225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74a531a49608ea927a889dafc998be902a50a48b85909b01bc0f92b2fdaab2d. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:37:41Z), 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/USDHM1526228.