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 0xf61511d1815cd0b034c64f879e45a73b32e318ce7b35c4dd51e8ba8e0f28d80a. 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/46b70c0b-7d26-47a0-94cb-94c53fd66fdc.json and https://artists.proofprofile.net/proofs/artist/46b70c0b-7d26-47a0-94cb-94c53fd66fdc.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 0xfef4b321f4261621e367b0d4ef4650ada90bac9562bcaacd9ae09f661df85282. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/GXD7V2587254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x968426cc072f3b60588d191ff9cf0efe9872091ebe4b76bface27cde7fa8733a. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GXD7V2568591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99cb599df54af097410aba3066b8eaeb4e53ff47242e92a82ffdcff5c2f3fc7d. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/AEA3A2544090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222c902b8ec68aedee0510ee940acab65057f3c09da23e4472ac1c3c85bd7f0b. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T10:52:01Z), 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/AEA3A2119541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd01c53b7781b25b50cb294fa4b0ce93b2bb77bd1bacc69f7fa207fc44e22e7f1. 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/AEA3A2103240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6326289aa8d005949346587842473799dfb8310901a2d0552dc28ac5c9ab1956. 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/GXBAV2102449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4514bd1f1ff654bcfd6882080c316701668a2a4f49c7230373bd6476ab0e950. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/GXBAV2111306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b19421cda3153c90f922dd5f59e05f2d230f2ff1d0b589eb64be82ec63158d. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/GXBAV2015298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230ec52e8c893171f43fa9c2964acb9a5b10589162b814db7293ab2384cdf88b. 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/QT5M32599839.