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 0xee46299199b0d62073f435928aa7892f05931d570e04827c91bd454b932a2a0c. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a95853d1-dcb9-49d6-abbc-aa9a8cd41843.json and https://artists.proofprofile.net/proofs/artist/a95853d1-dcb9-49d6-abbc-aa9a8cd41843.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 0xd46d16bd4da67aa77afdf1dfe273e90da94db3188ccd5922b830f1a448d0d035. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZFZ62410090.
All The Tears I Cried Could've Iced My Chain
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9866928d240ce4dbfbc448bc66d089cc25a2aa372bd2bf810aefa780adafb10. 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/QZTB42360121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4756f0fc8c423a0cb948153af1896b589223cc65b24664525b34940822c7a70. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZTB92373774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd9a7cd5b30e722e67e25c77645e74347d6ac567265e10a6d1cb1160d0e1570e. 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/QZTB92373777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a34b08b16860bf0b9d14f5cbecde65381d4b7e2021f1d11fc1dcb32c2e1f47. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZWFX2481691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50be584cbad10e3cdeda0adc3908822df6f181ba95fc2be87254dacf3c8bf2dd. 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/QZHN92462668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x903b5262cda901efa3b7afebc162b085103c6c6b418341877e7ff260e999c9b1. 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/QZES92490472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf415bbe52e8c29d935833aaf74c1d0a3a638467d03f63e81a0b9717ce4660d27. 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/QZFYX2409714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78203f7bdd56018fe524a934300242c828a290b6b45467710a007180c44640a1. 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/QZTB72396816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc87a74201116efcffcdf0acdefdb9324516e081caa0cbcc55d21f350a53a7984. 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/QZHN92392960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc66a88a31b517b6889d8a034b7af6757db1279d43b6918f5bad02327ab0d019d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNWR2217410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac0263b2337afc19dc927dacccbe8903372f67dbef96a66870ed6784b5b83826. 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/QZK6Q2209646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x439206b07fffe70f0b9099977fc8394f1880d0b78cd44169bae0d106bff1dfd7. 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/QZHNB2297950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2721368f8feb793975151572e6c5a3fe6b13f91bbdaa55337db2961a926d32b6. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZES72240105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4dabfbbad34d430b8156b2f48088e992c6b36bebfaeef12a53dabee74788859. 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/QZES72203373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22248d9a8e081f8070690ffb83ecf499d40bc5ba49e12f3edbcd894228d6a61e. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZES72238581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06b02cd5bf008c0ca95d11c520f8cc8ea566a3ec07825b929fd1be34f3a941e. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZTB32530880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0883fee9f5e2e35003f7c4152fa2a92681b00eea5f25b84a6363fccad13f7a5a. 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/QZTAY2518820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f0d02a55129949ca6fe53d2e6c205e98247255e788a000c09aff467f4dae2f. 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/QZK6G2542575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f0d02a55129949ca6fe53d2e6c205e98247255e788a000c09aff467f4dae2f. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/QZK6G2542575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5c84ad8b3203f69febde17fe3fc9d915e7e728022549c0e443ab924907bcd0. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZK6J2500729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40803422e698425757f5660dc13e9808cc51be3cc65f01a26c8798f946b16456. 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/QZHN92592365.