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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81366d6123ffa8e851196e57e46557a594c5052991ae1ea911109fb551b29092. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8e4df389-f054-4614-9a6f-759c67b4d8f7.json and https://artists.proofprofile.net/proofs/artist/8e4df389-f054-4614-9a6f-759c67b4d8f7.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e1436de46f099e3edca764b0a19e136898660a22520ff566fa9bcead34c30c. 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/ATN261455801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8194e2a7bcda538583ee79bdfe3b8d8cf5e182082d62adecb3b9f485fb7e7a93. 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/ATN261455802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d3eedc9fda6d9c68bdbd189d44c486b3215ff3375832a063914ff29564dd67. 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/ATN261455803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5c44d603ce57cf392dab3eb1f1acd4444ae65c3ca84eaf32b57e2241d6eee3. 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/ATN261455804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5caba1d130c43e1ce76b24b97566cbaad9bf388ea092e4a96885fb4d8cfeb480. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/ATN261455808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61bbcdaaa50f22bd08c264e42205bf9a8d8f9fe3923b4b088cfa40972bfe3ae7. 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/ATN261139901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x621a9e3d8375ee585be89ba0680f6961299c6f3a1232b509e6f3235ecaa81e66. 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/ATN261139902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7afd6122d7af0231347b86dfa41785851f05d444a69d534b06a568b651c243. 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/ATN261139903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed6e2646163e8adf193f23508736cd29b8f4df15c83ce5ae67c138645599dde. 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/ATN261139904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69267fe91f9ca36fe528e823469ac8ee7dd8ef89191e665e250f92711ae082f2. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ATN261139906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400031161948cd2920141c73374371fc2f16637c0307b8992e4f1b26dd9db255. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/ATN261139907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0213e2acc37d8b682cf7caad5d8fe77e02e9d166e2925183569c3f180bcdbc56. 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/ATN261139501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a1be88998caa0f1a8bdec4bebdb576ab46412aae56fca2c7920fbbb3079f9a. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/ATN261139502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37642a9a42f76725ac29188ae3d7110a3c9894577ab9ef9d40b901b7abc475c9. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/ATN261139503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d3ec8082013de4926d48438bccab656dea9e7fca3f1464a9239552086bdcc0. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/ATN261139506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa585223005f6c15b53ed76d22213ca332e4f04806714b9e81f47b795e9f742b2. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/NOERN1002010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b02beb1035947fb5750b51ac274af8ff8fe544ba219d47448a79b22eddd7e4. 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/NOERN1002020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10946e48941ea70b3779796bcb635e2f75f4edbc0ecd1e4b1dbd87716b2b2e70. 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/NOERN1002030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772324716cbf8f8cedcd03eeabad6534e80b0c7771df7861e72d08ea1c89e12f. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/NOERN1002040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5070412bcc13f7342e426ca64322b6f5088e7c88a9558a9f557d67d48730ab87. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/NOERN1002050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e936395fc5e96a084cc9acc7e5049d8437211b082a11938d509f9a67409cf50. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/NOERN1002060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac0cb7916b9481bfe02e9adfcb872ce0b6d5938c1fb909d13ce176ddf287d30f. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/NOERN1002080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa801425b375e64d74be57bc513973049116d1da49630d321ff83adf7e917ba28. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/NOERN1002090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d9c88790f8ec899ddfab73299b6f25ff95daf942862599eeb93341a7e519ae. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/NOERN1002100.