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 0x3c45b62be610724cb97989c1e3923b8b91d78a2883e32984bc696eb01eb9fff2. 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/f4941fda-2f74-4989-af94-2662e694b0ff.json and https://artists.proofprofile.net/proofs/artist/f4941fda-2f74-4989-af94-2662e694b0ff.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Twits (Soundtrack from the Netflix Film)
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 0x2f06ef80792c5543147f14d3e420feadec54f97282d6bb3de0d7e9769854c665. 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/USHR12447821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb48d0924b31c0c76c07585d0ed3672a1cd3abba2d0749d393137207849015e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USHR12447822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d9a79c0bd4c25bbf19d36686593d227edfa0f50aca2a08fe8bb428f557aff5. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USHR12447826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd03962db984f012ff6050a213ac785b712cf8208192263b83fe24302a66d9f5. 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/USHR12447827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff0928f2638c982e52275075ff354d9c452edd5616a7e3fcee486c4bc9f8d66f. 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/USHR12447830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97419374cb215765b34b7722ba9ad8739a26c21cbdf76ab10b6883a37b75eadc. 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/USHR12447834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12eaf50077fe1bebd6f769c25bb1b78a40159206b5d2efc4b0577fe086f98fcf. 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/USHR12447838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb14af3ec1029865b90bbb7544f335a91536879d6e1b3f88bd0ff35ebebd10a. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/USHR12447823.
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 0xe4941329a747b2addc3ccf16ad38901bb2dc401ed149dbca664462c12a0f6b55. 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/USHR12447824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x349b4b1af9c2e68bfd0cac21692ae5153a1b224009d4050c374856af622c8be4. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/USHR12447825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a2a709ec7d5535f423681d9f34eb2e42aaec6a5d9da81fa0e5b2ddceb07e000. 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/USHR12447828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4882abb809f76c7a7fdc7c637d5f295b0bf2fa0e185bf1cbdd4c5c6cec37c592. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/USHR12447829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb792e0659e66b10a86674fb5502176e3397bc296538ed4ae5a8e46293b43408. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USHR12447831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c72c50e65a44da210e0134afcfa5599e6ab630f7bbebd295f31ee433e99e69. 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/USHR12447832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23f48e3f9bcd7224228d8262cd6c09f8fa682ee9017dc88ef8454dd5f6d2afc. 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/USHR12447833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4013c3518789351220473ecc8dd604693a3edd37051933ffe06db95c0f4372be. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USHR12447835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b374591bf165018d3cdbc30e2b7c8f62eebc8c82b7a81d3cad3f457b9226049. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/USHR12447836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87439036235eea1a0493243ea93399ee6c01c39de3bb689b5830c92b43132962. 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/USHR12447837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d66b0cf7c7367e541c064040a230d59a9325194d5544f25576ab4293d0abc55. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/USHR12447839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa63b2da6977e584cf435d4805b63e49f41666c229b244473768450ef9a88a269. 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/USHR12447840.