thumb|right|Reconstructed kiva at Bandelier National Monument thumb|right|Interior of a reconstructed kiva at Mesa Verde National Park thumb|right|Ruins of a great kiva at Chaco Culture National Histo
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 0x0825868a6ad6fba39b4179b2bfe8a95ac45b442add67526c15ca02771a1c45f2. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5630b12e-2c74-4daf-93a5-1238255e5a17.json and https://artists.proofprofile.net/proofs/artist/5630b12e-2c74-4daf-93a5-1238255e5a17.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 0xcabef2eafe0ebe3c3d997fdae20d8e52746eca8b112f36b13a66bca7771b31d2. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USHM81205530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5784cdb9aa5d91c92c725b2f108898d706d03ef586151a5969e6702a009307. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USHM81205531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaae8b00c10a6bc7c26596d9417bf4fa7930f97bf8295502ea84bc53903a1cd6. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/USHM80674598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c779418c20a8fb9385b1bc3de2c4a82bee5c9c666a3a6fbde820bfbe0036cd9. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/USHM80674599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2542bb4d36da907b5009d4c039f47036a9049bcfb23bb5d91287628889396d. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/USHM80674602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x156294753e57bb8354081821a9d3a75b466135c946655903c927d8c8d5509fa9. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/USHM80674603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0d66e71eaf6cf05089b3d73a1a8b506335bcef7b180c676b15671be4b49d08. 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/USHM20680125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d0005755e33cb3a8ad7afa526f3d6fa42c17a311ea1e88643e303c08ca07b6. 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/USX9P0979378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1e548a1430ac534725a3e2cbbef3aa796296f1503ea418d7ff79398123a2df. 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/USHM21118420.