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 0x4e32a7c2e534c53d93e7bc3af5dae27d76e03206441db6c74e1e27587ae2371a. Chain 2 (Bitcoin): anchored in block 953733 (2026-06-15T03:12:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/96b0d719-46c6-47c5-8c09-dae063ec863b.json and https://artists.proofprofile.net/proofs/artist/96b0d719-46c6-47c5-8c09-dae063ec863b.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 0x8a1918d2755bb8edc44457257a83e236cdc14e855ec7fd712ab3faaf5b4d23ac. 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/USCRR2413002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd768bb2c70b0766dff19c746e937ab8abb571db9006225b17b33fe2d2d511cb7. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/USCRR2413003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b7f18a8c952f4916221d7a22e0d2df951713491d3eb15dda68cc982e22b37b. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T19:03:12Z), 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/USCRR2413004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93043d353fea4e752162b1fb9581741d7f9655c6aacc23713b40f5bc13f12d1b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USCRR2413005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2818b65c6ceebb659c53c61c2dd2d9cf1572cd1de0fadec5966828ea3f342a78. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:13:37Z), 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/USCRR2413008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0431f6fb3fc5c6431b6fa081d7884219e689c52c4be28a2af7c4e0787ebd19. 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/USCRR2413009.