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 0x3703b76abf9c6fbaf227775a595ccc1d85a5c6960b86bdbe6c92069f6ea6d8b1. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e65b7c1a-b429-4f4f-8cae-2b50088f0534.json and https://artists.proofprofile.net/proofs/artist/e65b7c1a-b429-4f4f-8cae-2b50088f0534.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 0x9378d327acb20626ecdfbc3bf8f517eaff1beb8f751ff2b15f50e57b9668bf41. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QT3FB2570314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48a03486dc368a8a37ce9d46b41294da1a51bbdda8427cecf1777cbe25badf0. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:48:02Z), 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/QT3FE2584932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbed162551bc8d2c6c021a470ad5d7295d7026c5f910a7aea57d66c5e9789d25. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QT3FE2584938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d936685e3b96c733e2df0e7ed51bd22b51af88a4a3002958cba4ac172cf8a4e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QT3FE2584942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f89dc986582cd74b757b138af094185bf4f5142433ebbe3dd3f870056a8add0. 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/QT6E52508588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0aeaed86e8942a7af4a1d3a48f3d6909dfc10d5622d4c6b7d99d5180a34c5bd. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QT6EA2550957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2bc1206572738528a6063aa6cae0ff373f94f6d66130bbb22ae7c9deb147943. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QT6EA2550959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc778eedc7e13f819577ecae44c4782e3c1d35be24cf1092d6a0e10780be5ea3. 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/QT6EU2532591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9fc506208fb8a095a64ab0d7b7998d4e5700428c2bd01edde7ad9894b7a5c30. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T19:00:26Z), 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/QT6EU2532592.