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 0x1e73e25334a530b8b73b8e8fc757d3d1478e6744abd06c080e08245061183c7d. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d8fb47b3-bd6a-4f8d-8b60-26e5f48c06de.json and https://artists.proofprofile.net/proofs/artist/d8fb47b3-bd6a-4f8d-8b60-26e5f48c06de.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 0xa291bc5a479e8e579f14b47abc148afafe04541091aec8fdcb14f264a5cf9d45. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/DEZC62580421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1902f4cef1546e9660f10e7fb5ce82c5aa2be9b646b4571163184d9beeed23. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DEZC62580422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc1a06664721b9acbcbb62ec5945a9cb17eb43da00eeb40cf675be80f722571. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/DEZC62580423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9607b3d349c13a7418610d25298019a6f86d8fce36076dbf1874ae7fad9a8c. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:04:20Z), 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/DEZC62580424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba52f0e5a5cf9119c4f6c83e2a143b393a23ab7d0c40023f8fd4298c132e718. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/DEZC62580425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e3a7fa7ab5748714585139b06122c9149e0fafa869ba9ea6f94303c94c26fc2. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/DEZC62580426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x129beb2e11525007577e8ebea48aeaf26f0168806ced916c576b087b118ca163. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:30:39Z), 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/DEZC62580427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f44cd89f7819a7aa58571da2af9b67997a90144e2a3b1df043932ffe785a4a. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:53:03Z), 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/DEZC62580428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6394e7ce00488deac3350f21cbdb7cff3df6b8630df33e26369e4868587863fe. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/DEZC62580429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e204949b4faf402a5237f169e30cdf6055af139efa90d15524c67a7f38e9d0. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/DEZC62580430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8113604f19623f0e22df375571f101925dc4d161fb91e1e5f33efb6e32ea82ba. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/DEZC62580431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3598102623ebcd1359e6d040622cb94ae121991ca8ec3871c32da2c8d2be4ff7. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:01:51Z), 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/DEZC62580432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d84d61ddcb5b25d21c1960f2ce525921a90648f4627c39503ca7f84049de7a. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/DEZC62580433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3cf1ba45aa780688ffb988f90011bd2b02209552b3ca6cbc8f801abc7ecc1e. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/DEZC62580434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444930f14e1d56a47e6a0a9c4f42d10299f0726c1b414a868ecf657d8de8943b. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DEZC62580435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c95eb6b12fc970cb5a934834beaf690137b465209478de2b9a0b3e2b214cdbe. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/DEZC62580436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x411f38842a8f1b87bc4e3cfb62595da67bc8c32134ca707e9ef00278bdaf3461. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/DEZC62580437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec64d9aefad1d5a5281b011512ad3ef1998bbd64753f69b3846b0d691d43034. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:51:07Z), 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/DEZC62580438.