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 0xba3e0b4a88d0152d0943440e684bbd520c454cf28430de6ee0f9c12a0af57213. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9bfd524c-76c6-4d5c-b51e-d71f9c8ff2c2.json and https://artists.proofprofile.net/proofs/artist/9bfd524c-76c6-4d5c-b51e-d71f9c8ff2c2.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 0xee38b9b5aba7cb72810f4a57619fb2e1d9ae1ef316e33e0b39ee1ba018311408. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/USA370951999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58559ef94be7a6c3ecc39002eb71be036d04ac4f64d920653e60b41fd2326ac3. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:04:36Z), 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/USA370952001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2babd88099d1bc70e09bb6f81ec9ef38cc0611c0274ba5adb09f0bbae7bd4095. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USA370952003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77034bfba8619ab7f52bb154fae4b95a2836a1df048841084e204dfb57821408. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:59:51Z), 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/USA370952008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f21bbb15e46442c69f17a8ccb3265dfea1a67e06825025f09fb60be6984548. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/USA370952010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61bfae78442a83d0663f5148ed87aee6a6894126917c8762875ee400c8d03c84. 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/USA370952011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56652d13abb15433586ad940a3292b771fec6c867afb8e1879cf7bce45b5701. Chain 2 (Bitcoin): anchored in block 958660 (2026-07-19T04:21:53Z), 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/USA370952013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92880e22a28fb91284e0cb651d41ddac5e8f8f230b0256f12bedfb64589f5e5d. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USA371046804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9499073d803998c1a74b91ecde9e19c8e1fb8a5c5172b6b1bf449e495d32d30e. 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/USA371046806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01bb6f7cf7566bcba36410f5f6072a0d7c8f662c26d26491cd56359972e5c2a3. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/US6R21323868.