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 0xf70c1f0ed6f06970eba5a03b7ac9d842f6344c583536115af4afd0a3afa3d1bc. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/909e77df-0f58-4fad-ab0c-8e491635858e.json and https://artists.proofprofile.net/proofs/artist/909e77df-0f58-4fad-ab0c-8e491635858e.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 0x3c2a85357cbeb38065f2b7abca37051ca59501f5198cd67524b45d064552c986. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USA2P1691980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa41c2a95a065f564621bbaa0946adb85918128a15a4a50c14c41f12403a1c87. 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/FRX202249200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a61425db0110c5b9215cb49ccf59fe581d23256b53f9bd7aa7cf4d94ef648a2. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:43:36Z), 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/FRX202249205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1821565d85efcfc0f2feaa99da0e1c138cc5c4213af3d26c94b86a3861f532dd. 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/TCAIL2419392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e1d8407d9f2a13afd864448195818daf3c7ea29bf2d1b2c38fe9498bdada6fb. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-20T12:16:05Z), 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/TCAIL2419446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe15d2ebaa40168a1906b8542af3f461b9d08933479fb99db68e05bb0d5effe3e. 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/TCAIM2419434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa67c6c894051b9ae699abca2f8d1e4ff7b97e3a3d6da3fe56370d784a1222e9. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAIR2460390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7332753a906e3cfda85ea7ec1d739cb77ce4943e9f5b89f260bd151e1a7811c. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/FRD0K2501450.