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 0x93e8ca2484d7bb27e0f18dd364d9e4efad477462df08d5240ec22563ec0f9528. 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/ede6b781-c4ce-4c02-9ae2-e6dbcffae0ef.json and https://artists.proofprofile.net/proofs/artist/ede6b781-c4ce-4c02-9ae2-e6dbcffae0ef.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 0x5cbb13e35949c6c6c1b92f4d9f154aee995e0f284c78b1394d4a035b69cd063d. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZK6J2048497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf48d44855a2ed5d3be5bb81cb94e3ca86a7331536bba297fe1885bcd4719c5. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZK6J2048498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x533e574f252caac38961720a8b528dac5095ca29cdf48627b1aa31a3a2383190. 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/QZK6J2048501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea11a14a00cb5034a77e66f93507cc0f8d09b6860e8193c809fb77ffc1458dcd. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZK6J2048502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe77bfd5ed24e57f4e9b05eb330220dd90e786aeec69c58fbca6c515fd0b3ec43. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:39:22Z), 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/QZK6J2048506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4abf2100e46126fddfeadba63c29975c32a9201e4273ff096070891135f5a6aa. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:56:05Z), 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/QZK6J2048507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30a13c9dff250d4dd43df14205584173231b6cd33c46f19790c371534080c9e. 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/QZHN82260878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe065754b83c7e6c7e30e40b0f4c299722ee23e5e3d41c5ccd52f70e5c5baeb74. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:27:47Z), 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/QZHN82260880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf36e2824f588f767c3aaca434b411128cb647dac39b216058cfd815d22e4ea12. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZHN82260881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3630d209f50134208ab9f6bcbd3beaa740f4bbe79fe6e943e78bfe502e352d4e. 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/QZHN72299763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1bcc6345c038f00507fa6b9b581d9e43027f464660542046d76b9b1d3a4cc09. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZNWR2327194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f46b05c9009aaa38ec195986a22d9cf811f2e28a77bb488ff4015dde8dfd6c. 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/QZNWR2327195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbdd460f6730b98b5816348344ebcc4d9f071389b5b127d427d634174b525c63. 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/QZNWR2327196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78e26bf660525faea851bc991702292ea04709ae32c414609c1ab0160b9ffaa. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:21:52Z), 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/QZNWR2327197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3195bbb37ebe04909b42259a5f42db654c65f453be2a22acf069e76a830ce1f4. 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/QZTBD2326977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb62dbc6da306b4af76f74cf30a05777bf217c6613f469523b9f7511899e1ab7e. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/QZTBD2326978.