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 0xd1e2be79ce03538972eb8f9f205a533d125c7928191e1b4117fdfdc7128e824e. 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/4e1b8065-5a16-4c0e-9ddb-32d2ddcb97ed.json and https://artists.proofprofile.net/proofs/artist/4e1b8065-5a16-4c0e-9ddb-32d2ddcb97ed.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 0xbb02acf748254563c2daa38d3119ace609510dba14d981d7800513531cfb2e72. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USQZQ2501360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434cdc5e7d7044ae6b943fe1c2512dbecde4ef3aa6246bee15f7680c46062b0a. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:47:29Z), 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/USQZQ2501361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850040ad544055de9f89abff0e8f9c45382f916bad3836494addb4c091a9776c. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/USQZQ2501362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe17c079d9d21631e3e815549cbbb76fbe95ab79da3c66740aa9ebc6ab4654bb3. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USQZQ2501363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bcf9ced8bc6737d740b8ef553b47a73a2f379418adb223492700c41ebad039b. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/USQZQ2501364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18830180c7bf17872cc5425d3f32446c48882c28e1ba27d94ac3e0f70c488173. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/USQZQ2501365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ac8d69e535bab935d1d4c4f1d86e828513238301f3a02696a32298fa4c59e2. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USQZQ2501366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc85904fd7dfc90adb4a5840c29852f8cacd043c0b9e6505916a70a8427530ab7. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/USQZQ2501367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa08ae16c62dff15711dd109f73430bdd55a1ae9b0681503589d83ba7a16f1cf8. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USQZQ2501370.