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 0x89e0cfa6949c0d752c84ff6e6389374c46ea3bbc1c912e1f53bd15c5db8219b1. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b8a59a74-6b70-4ae2-bbc8-034ea6497e0d.json and https://artists.proofprofile.net/proofs/artist/b8a59a74-6b70-4ae2-bbc8-034ea6497e0d.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 0xed01f325a332da6144f22f24f74327e7adcf54ca4d991641065cee135684f4df. 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/MXF369300058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3253e39b7049ac2e792566a3c920a99da487f009d7c17e9b4deb415b9065b1c. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:08:06Z), 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/MXF369300060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7267de6f28c6779560438a7178990d07e99a4ca3bcd0f224a2c379088a1fd587. 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/MXF369300062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef9a4787d3d5226f1ba0271e161b561f409068c7f4fe5190419e805c31ee459. 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/MXF369300066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81883b9ce24e7d0625f3509bdf38d62d38cb72c26a2392abc002d22ace31ff62. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:24:07Z), 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/MXF369300059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2032f235def73e220072bf1186231e4cad17c635ba679bcd02235522a2df2dc. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/MXF369300063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a040e75672519e17e9f397e4caf96fbcbb6e9040aabc4f4c57c1c6184a9594a. 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/CA5KR1974451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4187f9025437e921ca58b3733b657cd8c5071a9c7f5af157f45a6bdf5570fd08. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:02:32Z), 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/CA5KR1983019.