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 0xdb985779feb17ba91bbce7a2c011748f4bd669fad8637ecdd95e4b2c9577cb07. Chain 2 (Bitcoin): anchored in block 953848 (2026-06-15T22:54:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/01a305c6-6a05-4e50-bc36-32ba161dc26c.json and https://artists.proofprofile.net/proofs/artist/01a305c6-6a05-4e50-bc36-32ba161dc26c.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 0x33acd16d33978aca85fd78568a6ff567d7ec30ddf429ce8071b0bbfe54f21d6e. 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/QZNWQ2279896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a435c7b402136c964813fb9685436c34cf34d2b7081f8cce895c016dcc61d3. 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/QZNWQ2279897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6dafd94532af286b6635b02621d0e11e776e827031099367aa4ce9feb4b9f19. 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/QZNWQ2279898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e06d0d6609caacada7e2fc490333c61cfbd615abca71497b400687640d3c7be. 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/QZNWQ2279899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09465f619d8d7c10fdcadee65a7678d077a0e044835626ca52fdd97f90469114. 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/QZNWQ2279900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc70fb082e675c41fc77ccb3c9b369028416d87f0dec709e8d3c833e0a80c1af. 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/QZNWQ2279901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf028a8e978d9aebc11ae578c73352cabc7273cf71395081bedfa84ddb26dbea8. 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/QZNWQ2279902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0186ed51919b30ad5971ec0cad7d1ddce8754563f399a5b47f68dbd7379984. 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/QZNWQ2279903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432c3208537dcc26228cb349704e75767cb03f699b26c59d50abff27d4d0b142. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZNWQ2279906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5ee48ea92d6140fe6cab7636b0ab4387582980b816f08b09b8fccb6293d6b5. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZNWQ2279913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda414d278e0dff6dad4a11e73cd3ba119711978e697810f85941febb3166469. 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/QZNWQ2279915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b33d2731818bd5eec67e5cb4822b9ba2fdc2729ca22dd1a60b3ae1f2eb5a983. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/QZNWQ2279916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e0134008a162a0f63597c1c921067c15ed561f0eadcb293eb55990fbbff398. 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/QZNWQ2279919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21268cb83e9ffb16a9859a5c1d521bca803c77133ad4aeed044c98f486f80b98. 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/QZK6G2308155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28cfc778be15565748e1081a7a6bd14d4894be5c8a3bfbfdc856d72b8da2d1a1. 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/QZK6G2308157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b25ee37e9587e9fdd633f1975eec46be18da76872e6ef960283eaa9cc0276c7. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QZK6G2308158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c9f02711a4121bd8dd23b131411f27596eef539d72ca2957b211753964b87b. 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/QZK6G2308159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462d229a94855a7f3c5593e348d4e6ab4d3fa3052242c16f6bf339427c511893. 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/QZK6G2308160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65fc2f3e4614c7a34abf08400d27ca613aa4818cd48a1c27fb067acd510273f6. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QZK6G2308161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a0d8a72ee4ec4bb633979e2606a93043a84a945743b2fbc4f5b6a2015f448b. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZK6G2308165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52376cae1eb090781e967535eb3d13ec1c07ca539dc0b1a283ab37c392df9f69. 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/QZPEW2425354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab81f6f46c06be5d5566dcfcda82e9be5df1e9ed47938472e8ca7d1e99cfa652. 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/QZK6N2574549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4be3a689ff1baa154e556caf578281b4ed6cff02fde124a9bde501e47cbb6f. 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/QZK6L2557100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5316109aa781aa9f3cbb281a23704a391ce924d7de684e845d5776b3b5d03be0. 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/QZFZ72568941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b2911b726c2db552fee5eb64542ad60f0941f7ccd20caa3c365638333058dcb. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QZFZ72568946.
latesst is actually the oldest techincally
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a795314ec75d26f21a0973b2c5b192a1af5c49645ffd464d9a95ee58b535521. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZFZ72568956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97fcd3f2530c56eaba9a72a5b998ac0c885cc47a792cf7cb084b9eb2a0bce9e. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/QZFZ72568957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8cacd5e16af7083703e7bd8a239658b96bb96bb7fe3a515152b2d301be53150. 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/QZHN72548062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f19a0c07372f417d16aad46cf025fbc09fca4bc22a3cd58c0eae1e06464bafb. 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/QZHN72548063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1be5564e6df02d36555260c2c705822e7a20bc6576cd4e7feff823c85682bc1. 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/QZHN72548065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e47a20aedda973fc55f8831e11ddd6d02a1621c3af22a44dd9451fc824f467. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QZHN72548067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba196b4fedb4cb07d7f61015a4eebab4d26db8916db52473e51943840acca82. 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/QZHN72548070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26acdf0087abe8d1152e6619b1042a958544ba5a7458ab8d97a8790ac1dc21ec. 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/QZHN72548085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6cd1f453e478bda392115cf9a95d4d99ff47632089e75b72a2776f1723a88d2. 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/QZK6Q2538647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa979276624a78fb41bdc7a5ea8ed4de94490a31b69a4d651d58fa722012cecbc. 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/QZK6Q2538648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e706c52d0907ca917a6bab98453f71236cc413b46b311053ae227cbe288383. 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/QZK6Q2538650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74dc42b202bcf0d8095728a1914cc739717d8091210c9840f9ad45df8662019. 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/QZK6Q2538651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d032652b84ff29266601fc41199e80fe2f72694ae66c3bef16cca3f27a44b6. 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/QZZ7N2455126.