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 0x7415f25d3e55fdf60d7cbce4b4429c781877d03df68fbb268af85ad7ce479f27. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4609e5b8-732a-492f-825b-134221fd0962.json and https://artists.proofprofile.net/proofs/artist/4609e5b8-732a-492f-825b-134221fd0962.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 0x1adb9b0f3fadd948610d17d6bae0491478ba576fe0ff597b641de3608a59fd14. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/TCAHM2353163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e9ee54c683b12262c2062233165f97b628e230cac2735ec5bb1d24fefee5aa. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAHM2353196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c3fab88aaae3804faa156505f70ec6aea01df94a121297b33ded9cc67a46a3. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:26:03Z), 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/TCAHM2353203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40bffba7488211e7e7b64b65d923937ce995fc8363928dda365eab7118e142f5. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/TCAHM2353212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf886d57bf6ff95323a78d178791ad6e3bf8bdeadc36be0d7f5f3c4de0bd86bd5. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAHX2418856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9434b0406e23799851fbd014937462cae6bdf28060475cd027eaa6dead823d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TCAJA2486150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa90023c8ba0da7cd3555ede218a8317d744d52d13c7d830ab428d1c573f6b33. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/TCAJA2486163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb64e431657e49d31e9e6826942e978a9b34215ea85cf08c9107f8b75c3968f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCAIZ2486180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb8ad91fbbf29817deffe7246dea1173ac768c283ecbbf3479070d29778d425a. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:08:08Z), 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/TCAJU2530459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d0d8e91251abb25df78383763c6bf0e37ff5115c4190b8f8e3863a4e31f4b2. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:30:51Z), 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/QT65Z2529174.