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 0x0c7b88b01b6077fb7ccf237cb34a0e57c022369bccba6b81e4f4d4fbc6af2c8f. 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/7d4a2e7f-8afa-4954-9553-513b2e62209e.json and https://artists.proofprofile.net/proofs/artist/7d4a2e7f-8afa-4954-9553-513b2e62209e.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 0x59da283baa743e69d73db0a6d4444c02dd4520c76b5253dafc3a7679c2d4bfd9. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZNWR2247573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x948cbb54090647e238d81715ea2d3e7a60f27e60f2e02b19971005607b2e17e3. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZNWR2247575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278893a6d44df57dfdbe0edf29ad4fc5f10295feff9ef8864b08bc576cbf894f. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZTAY2246497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f391f0e0d8e5dc1c1ee6fd5c177ba0437a48218b168652b29fdfd561e20212. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZTAY2246498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4b9eba81f7b98a9044d034fe131d0a56192dd49c7009ac0a35665dfc7a9906. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:36:14Z), 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/QZTAY2246499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x156e4209f22debdf5cb1ca1735f1989d35918dd13a8cacdbc65c28b766ce2593. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZTAY2246501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4720de5bb6362c93b459e859529f2eecc120eb4080d4c7ad0cec5f9d9b5637ba. 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/QZTAY2246502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e207ac29b7bc4ff05735489d86929ce6cf2f51885e3ad82c98c7688a7faba2. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/QZTAY2246503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f05a67d57621153d23c85e79cf90037d3ee336d94cacb1562cf3fa011b1bb6. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZPLR2204752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d97cd3f4cc18c0496815dad32f5fb3700f73881b4375ff81cede09f09d407f. 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/QZTAY2246504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b956daa41b059c8321bcdfc55ba5486e59239b2ccb868c7ae5fd0d043e6e6f9. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTAY2246507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92728f032d3cfe7a6923d78c18d347283b902a11796613a4cc0e72398cdb2b3c. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZTAY2246508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1155de5372bb1a1e87322641dbed2ed9dd7610e0c6300d5fd52195b2c2110e93. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:24:07Z), 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/QZTAY2246509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b8b8fa221244a3a126c7d2854bf2f0147d90f52ebafd6048a2510da91e53ff. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:04:12Z), 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/QZTAY2246510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6c3b5421d9ed2d269c3d83f2cadd1903088965161e700699cf65d800f3ec5f. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/QZTAY2246511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f7f34ddba2d1f9476b08ea410b8692ada2386a0b9746ea0639997910bf2043. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:56:22Z), 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/QZTAY2246512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0495538b6c42ce2257484afb9d7c16bd505415702a95a45ce13d98e5c90c429a. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZTAY2246513.
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