thumb|right|Elmo and Rosita film a PSA in 2005 with then-Senator Hillary Clinton Elmo is a Muppet character on the children's television show Sesame Street. A furry red monster who speaks in a high-p
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 0xd400021d3a56d235a835890f555ff5474e915873e451ea9fcb21bb7beb4e51fa. 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/e7eb6133-c2fc-4a11-ab52-71ea87668e94.json and https://artists.proofprofile.net/proofs/artist/e7eb6133-c2fc-4a11-ab52-71ea87668e94.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 0x13a36047ac205c91c6b84ae32cca597cb803913ea924cf9953434c8d6f221580. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:19:21Z), 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/TCAEQ2037138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf864e3108a67a56bd6809f8ae3daf189483184f4285f8d82d29734ea19ee001c. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:23:07Z), 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/TCAEQ2037191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf261036545975285da6222f8f2c648b3e1c04d96a1914d87d73eacd90cf9cebd. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCAEQ2037280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe67465b54be4d83749ba4baa9d3f41410416bd6df7238d60e406c641faeaf51. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/TCAEY2021737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954aacb185bdbd216712180c64b9acb87e73f8e1b28a655906e2ef051ec7c7b9. 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/TCAGF2266938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f4f8eae3f3ef570035f6d7fe14600bd891fd72bb1193215bf7dfac1ddf8f1d7. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:21:16Z), 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/TCAGF2261010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc622642898163dcc83482509b5a7f253b951ebfd811178ba86d93a2fb7bbad4. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:40:34Z), 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/TCAGU2317362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf5053f6ca93d5fa035ebb2410738c2eff112039f8983a6df36e5941c346e2bd. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCAJG2582059.