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 0xcc596a570c26406d61f4c6cca3ff610b058c202ed101749823f97e9a2eeaf306. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a3c20287-98c8-4160-8b8b-5153b6f0bab1.json and https://artists.proofprofile.net/proofs/artist/a3c20287-98c8-4160-8b8b-5153b6f0bab1.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 0x25be5ec859644cf8573c6a1c8bfaa88cfd8d80169fe8f9d03aa6a44ceadaf633. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZHN72209490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb523b1ef43ea23a7cb03239f69a4eaee8b9a5a7253ab80aa55c82d677bbcf34. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZFZ32345990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad9785923246ce3bbc46f6c939187ccc0987b115c7b4c4c3d1ae49fd9920716. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZNWT2351220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2817dc653697af2e4ac1d582b6f626bc8e4e454f9f0175cdc82d0fdd6bb942. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZTBA2544817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a3dad8e4d41634d46ab06a2319e1a5687eaa9ae8b3abf7b4e399bd351f1932. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZTBA2544810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97bb529889a41c0ffa99758e1fc0d6365bee9bef7b65bc1ec28e812cf9fa0851. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTBD2569276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f469e201b9d7972f113c4fc60aec0ad5f8853437a34392b3e28599a6509211. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:34:28Z), 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/QZZ772565183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1623a42536f7f7613030c9966e1bbebc95227a09df6e0a57d2fb9987009ce5b. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZZ7N2508240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cadc61d813b6e4aa2e92ca5120d06d676dc596559a7219d7e5e4362c1c261cb. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZZ7N2561394.