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 0x877880e8040685be6fe75ebe98445e7b7fb711423c92fe97f743d828abd53e0d. 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/cdbf150e-bc57-4f7e-98a1-e19a0f1eb0ab.json and https://artists.proofprofile.net/proofs/artist/cdbf150e-bc57-4f7e-98a1-e19a0f1eb0ab.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 0x598b2ba4679fca37406ea5cab2fdf00a860e796a9ab0f95b084bdf4016d10503. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTB62211136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb83232574ecd9a7ba5aa7c7796344bd2206184fbc737c664c7af8c85af005a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZK6J2251631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x598736043110c6eaad0d031c8e7645b7e1ad4168d63c711fa4a5d459809e8ab4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ARIXB2401042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa462590116f36f757433bca50e146126d428678889216562dcb94ea1733a138f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ARIXB2401077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e700877b5f2f1f4c4bb61c56251d891503db89bab5ee163a471e7adce96709e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ARIXB2401152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0074c67829aecb49a0a55ebfb36bd2ff0ab4afb4cb5b254b75d14414c943fcc9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ARIXB2401153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7aaf4a1f58bbc39e66e327af3976c2b53d29d629a2fa2392fd503d37f8a964. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZFYX2229309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18bc783b150823c0612441147c37ed6df4ca093101058acf2724f5e9e54891ea. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZES82265440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed6e4a076ed0a0ef29398acebf3a8f3f6d4892e9239ac34999f7258ab993dc3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZWV32446981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a28abbc632b9f2b2a534c1f6efacf1bbc1f68e327338de7cf1396bf0048b736. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZK6N2361301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2c7d0ceabf3f1cddd173638569a46b86c2285bd925c4635942056be3c609a4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZDA82384348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70e7a71305caa501520f1253c2b79f8d237e93afba8e0132625de14fb71bf4e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZMEN2243202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3198c88bf9574d21b10b2fa607868aefab8d7074c586d7888d9600581b0dc6e1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHNA2275751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a99529b40d3d5c67310221621e7719fb41d0d82eb802d978e5ff5a05eca1ae. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHN62275535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83fc03c382cdaab724f34f9ccaddf6aff40f738fcf5bafc5b3c201e82b6c6f8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZK6H2138382.