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 0xb5af386a884cd3e390a833d264f7dc8537dcfe8c7000496dedac488468a6643f. 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/6b69119c-c160-47d3-a19d-3d20a3573a87.json and https://artists.proofprofile.net/proofs/artist/6b69119c-c160-47d3-a19d-3d20a3573a87.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 0x7d205eb6fed5bd857a5e395eca8f65e3b521e4c54723cec51d14f7849d5e88ea. 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/QZDA52334386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf851209b7773e7875c2de43435ebf57622720758de697c591d8cc632cdf65b0. 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/QZPLR2266399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x630456c59234453cb53231ed38de0d9aa89316d54f7492a31e4afca4f275544d. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/QZPLR2266400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8133280b0dab2f9c30383316702939bae13eb372d85a4837b361b6d6e79df23e. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/QZPLR2266404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068e2aafe7d6534754a4f99509b5b1522f03d10ee49062b6fcca6c3de9167a4b. 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/FR96X2297122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d8b5418d69a162edfa5ad5a9878ed7c389880cb0722c29d8df3cc94e65acf9a. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:06:31Z), 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/USJ3V2104187.
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 0xbf3d4e24fe768f63a48cb9e88b2bcc84cd6b3d6162f96a7817d852885e7737f4. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:29:11Z), 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/QZTAY2356738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77cab6a5384f8201cd0362ec9a761188a296654977b7f57026fb43118cb5e5dd. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZMEN2448062.
The Holy Hunchback - דער הייליגער הויקער
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae3d835d2418de9ae8d5f872a49f17a6cf6b751e02bac434824017ae087fd9b. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZTB92364926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72466a9b3810dd20d3975c6ece58c87e6f59ed62fa91cd87eb9b90e854a07d55. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/QZTB62228540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b4cb21938cb2551e25b4c28d0cc0bc9ded52de7cfab3cda7200e5ca223d8c5. 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/USJ3V2033811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc9580249e2f18ebc5a2876389a9f8a0c8fe45b8e30a5121f74119175cb6bfe. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/USJ3V2034134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31979657a521f0be0abcd9467af0303d1f66c4fe8941583e88cc53690a17c6ef. 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/USJ3V2034135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea88ab005cbb0a3488a287c604d3fd32bdd5f5fc2ec89d33ffa37a85d345bdc. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/QZPLR2266401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c23b83e75308b84c0591e62e39d2b471084a5954cb45b8476ecd87a0f3560b. 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/QZPLR2266402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a21ceea469f90423eb9fc575746fe7be488aff252b8ee42985697975f801091. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZPLR2266403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd537690b9cd4a5b4463aca28d4b1737326cace6bedace86c22542aaf3e80c0. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/QZPLR2266405.