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 0xffa0d32ad97d52f41c4b153d0eefb0c421c3a19c8870766f5dadd074d02fbfd5. 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/528a6eeb-57ae-4b43-9ba1-77357f0fab28.json and https://artists.proofprofile.net/proofs/artist/528a6eeb-57ae-4b43-9ba1-77357f0fab28.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 0x201a1ae64d041ee8476453da25f728cee3312b66e8830df035afdc83a66df3fd. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/SE6QE2340572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9227931a6c597a7697da970acaa074fdbc8f7831b3ac1438b0e24332c3720c6. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:00:43Z), 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/SE6QE2340574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91f51e094a8e86b41dfdbd10111d43ec0899af924ee7bccbbb33b683da47e11. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/SE6QE2340576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39587ef31639e407b3e5b0a3c35c116b03f68125d7d80a0c20ea15d826c867c7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE6QE2340577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b29448fa8894f6875022d52d00bbe497034350521139537138d2db6e1d0ae7. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:32:20Z), 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/SE6QE2350071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb631a494f72bda150376e4d288ad6ed4d2f06b39af3659ffbce777f08646213. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/SE6QE2350072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a8680c212b6a9d3bf17059d70e8f207421883d4b25046b0f4e7e258b5b917b. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/SE6QE2350073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb54dd679b1ed1922ee7f53c61b9f6be17d9d209da9e426ad5a320a12f3ff59. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:10:26Z), 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/SE6QE2350075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x732aa3447bae6d6ef03ea8c8531788a7f0cb42f15121d830e81e111979f68d27. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/SE6QE2350078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca6bd0346ed90fe86826cda1bcc6ae176d48dabe4446ab36ed196f3bd3f70771. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/SE6QE2350079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5824e1e91e2f556437222f0317e3ecd2626a0cadf12baf41ba4ac26baa82d30b. 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/SE6QE2350080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb5dd0cd65bbbcc5ce68788a950b88f9b7977fef7efccff6a0557418b8301eb. 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/SE6QE2350081.