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 0xc9fb208794f75f5ca0517649c81f151f70879d94696febc4a52f66eabee7a39f. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f0e9b068-ee87-429b-94cc-58bc95b58c27.json and https://artists.proofprofile.net/proofs/artist/f0e9b068-ee87-429b-94cc-58bc95b58c27.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 0x94fe7fedd21b78bba8336ae50c20e9b8b362dc9a78ee9f4c67b74bc9f908c13f. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:39:42Z), 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/TCAGP2250920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d600732551127838b0b2fc77b0f3be1305a22b5a641e896e07898ad88d7dee. 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/TCAGP2250922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531947bd6802b4890b6f66b709da3055ef59c238e93ce0c248d89ce4e1757f47. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAGP2250924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a75b520a398b4a18addd1fc8f455b2abc535edd9cd15cf64d5b1d4b9ab3f321. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/TCAHD2329104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce9cfd089fd574cffe3dbc82d83fa0b58330a2496b912e3e572fc8146d5b28ac. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/TCAHD2329114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x297ba2328155f770e4c5b6a533e9def3e018a5951f823416946d51b58dd4f255. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:03:24Z), 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/TCAHD2329122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3a517338e1012bad894c072008d1988861cd697a5875e184e737aa26e211e8. 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/TCAHD2329131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c2c76b9fdfdddaed0dacf2e944aeffda1de9e3117b3c606f1af81700194ba3. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/TCAJF2564735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dbda5bc4bb1e9705e772ae13f5b30ff81e319574846f9827314a77757bb169f. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:10:27Z), 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/TCAJF2564743.