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 0x792729378d6ba9c55f7d33bcb1a021b28aaa286134d92c77f4fbf1e5672d1bae. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e03b4b94-382a-481d-99ac-e30aeaeb2811.json and https://artists.proofprofile.net/proofs/artist/e03b4b94-382a-481d-99ac-e30aeaeb2811.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 0xa491539fa28d200ed2ab3a77bc5ffb00b345b21dda83ec7e14010a7081a2e370. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:07:33Z), 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/GBRKQ2499554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5257aaf753ea6b3c70dd3e250bce9ad84fc3139ec916869a69a8a4f279f67cb2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWV32467927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c13042aa23054969980710256f7dddc691225c71649d6527dc4ede22ab9dfc2. 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/QZWV32467930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11817705921e7a6f564bcebf5ef11bbecc30c583edbe76251682bcb80df2e052. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZTV32453507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f187f8249debdad5859532d4facb81e9636687c4d0560363bee243d95d65be. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:05:54Z), 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/USLZJ2551743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x657e8e2d34c734e32d896e9c42a4ba04d7a7aaec7488d7d655e96638dcc0667c. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZZEB2411585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a5ba95b002f383628377a0c7fa03f1d039bc997dbce6d458292d02403dac7d. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/QZZEB2411588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd783793633bdcdabfac33af1d9918fa723bd69ba9df278670e655fdee6984ab. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZZEB2411590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac3be3abf0075cbf4030a3ef678faeaafe8dc5ea4b08de0a0b9950d5a1b8e3b. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:45:16Z), 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/USLZJ2551754.