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 0x8858e35c65b14c8213c6837251ea0770304ef48fb53a098d9f6382ca619e1253. 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/4ed7649c-b72b-41e4-b9e1-fc63bdbdfad6.json and https://artists.proofprofile.net/proofs/artist/4ed7649c-b72b-41e4-b9e1-fc63bdbdfad6.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 0xeeca4858d98c818e715d45ee5196d361c53c9567264fc72c79ae363b0984e820. 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/USJ3V2021352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3ec671f67c7d9c52ff66636e3863f12159492d471685c8e62d66f3153a4e74. 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/USJ3V2021353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4099da5b7046e06385c35d6986da093b181e82fedd7e9bb1d3d0d08fdfccc76c. 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/USJ3V2021354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9d425e8cba57811bb207fc939f748bbc3432a84e9f5df01d1bfec1e2ae57b3. 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/USJ3V2021355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd003232690b0d838b038f3278a424b1eff46e7f898a50e6c921fc40feedc1c. 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/USJ3V2021356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7517c87603c9e16a7a324607ec43f2f8f1a736731014dd7a819d79daf8875fe. 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/USJ3V2021357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a9652ca9d793a0b7152c8f8bb1be88581e9b73888029e505c7e9c2028f239d. 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/USJ3V2021358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb813503cb3061be1f40a09b1f771a654b4699093788ef6b2216210479aac34d0. 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/USJ3V2021359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf23ae104661d8d5f9d786e3e1c04c2dd27c66a252630ab171ede01d5bf6bc2. 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/USJ3V2021360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c72298b42d1b47b1171cac61cbce58e2e0e970936a5116bc9c53b433aaec336. 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/USJ3V2021361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86fa5553ee47214dfebc2fc6396d2608c3176e21b3a3a88aba1849df6180bd38. 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/USJ3V2021362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c83597777ac8cde104703253adbb7d393974bb9f7ecc81257d00b5fc02b24a7. 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/USJ3V2021363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1385b20e8b1afef19c99986c5cfae98a908b3cf6155d5e0db2eec321ce65cc42. 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/USJ3V2021364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6442a080b5a56f25e34559dffb2ae18ab18330c91c4a4829d5766b48c3de1524. 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/USJ3V2021365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e596167034ec6fd6f834bb38575a5d303f171474f0094f3fed2e7a68f4d8f7. 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/USJ3V2021366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda2bf6d4f7530ab46898530a7e4ff98ced8728bdc6d42aace6f24ba5ba700f93. 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/USJ3V2021367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7997111bdb58425388e782ebc2948fa41f7905eabdd5296e3c7407bd9bb6fe3c. 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/USJ3V2021368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf968d52af58993ca5781e53ae2609c185fabbd4dbf453f9c4128c3bdac72b4b0. 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/USJ3V2021369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ac4430e88d623dc6b556b764505f1a728c57b961c03e661b717bacc17d6aa9. 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/USJ3V2021370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b818ff6b48ccdada73f0707910d4bab0ff30751f8a41057d6e8768daaf12d49. 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/USJ3V2021371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111364f925becdfc089c06372f5103533e439dfa5e4bfad8664510aad5a9c033. 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/USJ3V2021372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d9cc5d35290b796f2610b3819b77268a78e0d6eb651e748cf584d80d01b78d7. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/USJ3V2021373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1c95137c3910a2b536508cb028cd363916cf2ab04425e2f527acfadb56c88e. 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/USJ3V2021374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c982e038f6861f6fdc948e5a969f3e1c7a6581078a8a1eb95bf747bf0c3c48. 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/USJ3V2021375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b88dadf2a15b637f12d374fcc52abb34d4a2e20c6eb3d273c0a5cc67386c10. 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/USJ3V2021376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x714666fe5fd5edcb795f0fd30d25957a77ee48b36673c981168e02dcfebfc87f. 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/USJ3V2021377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65e68e15723a80d3454eef287f9b2035ea695390be15b608856451c41ea5f4e. 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/QZDA82245505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325ddf93e23961f51b25ed6e98dcd092c487288bfcf6e34b2193c53001899896. 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/QZDA82245506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c0db0cb94ae475d6b969c11522dbae4f4cf29338e90716ced0964e49c650a7. 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/QZDA82245509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3cf628e11c3bbf5f706e0285cf4d57fd0434e8234dd57763325322f35a93db0. 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/QZDA82245510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb044864cc428517ef1993a3bdd9c437ac18cdaf7b922eb9fdde99d15db0fad8a. 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/QZDA82245511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a646a37a5abf83316011d17430c53742451688bfc1313dce890068f302e85f. 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/QZDA82245520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa88c382bac8b9b91d0d87e6d94c336f1faddfbe422c4ec55478eae2e09a6b86. 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/QZDA82245521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aea3394705f4b0646befece2cf42ffdc807f8414397d6197cf7aaba3c87d4a3. 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/QZDA82245513.
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