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 0x9535b3a3bba0c3777fae6f656a2ab7c06143a8c6ace6d194cb56f0b861b1ce5e. 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/43b8d0a2-5af9-4fbf-9dda-d2edc2a1c47c.json and https://artists.proofprofile.net/proofs/artist/43b8d0a2-5af9-4fbf-9dda-d2edc2a1c47c.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 0x692135d0feca7c17d3081de351fe88249232c1ff2f19d83cc7506f96a3af8185. 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/USL4Q2286442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd2e5f58bc8220fd46d68e21fe33116529dbbd9b52365d85e4e523714632239. 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/USL4Q2286443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09edee7ae0f64896de4119b2c0f10e6173d3fa11320a8d4fdc02a8fe73adf094. 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/USL4Q2286445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6173f392267d9123ed044992af566f3a2912a3abf67f14ced7136a6deda8f394. 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/USL4Q2286447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f70e0789bac7c4e6cb52ada8d0e59951b8c0635cb77a22a066265a02cd9d279. 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/USL4Q2286448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ee61f5319955da9fd97c7ca77cbdf2e3de87633be2abaab49888819530d40b. 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/USL4Q2286449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x226d945d7d54ca253834d14973cc8c51e4952fba9a36867f395c0236e59bfb08. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/USL4Q2286441.
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 0x9ed75b5009f4919ff95f37137549c66d23c1af6c7999b53e5801d1a70c672c16. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/USL4Q2286444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a9c876fe8392cc372719a35262b2ae953a64208e4b5a096e264a85c16b2eb8. 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/USL4Q2286446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c5d05c320813fb5389e2605cf8206283d1b2fdcc225ac04612f130f1d0b41a. 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/QMAAK1586839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52abdb7d56fc971eb842f43981a984c9b3bedd8beeff2623eb20d7023a1b2d10. 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/QMAAK1586840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0234842b368e864b1c5b3232d54ab867d2ed2d96874de5de65f25ebb4e0731b. 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/QMAAK1586841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b41e725d2265a9b5f25e18ac964839cbe4ab6dce811719c44ad8c8d417bdc4. 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/QMAAK1586842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5bc19d9dac6143374774aa89b8330454b4c9c4cb707c0d6ec798957540727c. 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/QMAAK1586843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6758541cd6642b5d1c770799c49677ed875d26f7d2098037fbdd8b5aa25a54d7. 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/QMAAK1586844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eab90ec3eec905326b249147d2eedc4c72034bb6515e0cdf6774f6f8a4e1595. 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/QMAAK1586845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f294e2a09951c5765df1456814a7fff0097c3a6a757b14bfcdb7c8cff92e32. 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/QMAAK1586846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa24bc4162e922ae10fbd2b823690e58b2782c91c60078f809aece536235a664c. 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/QMAAK1586847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb406cc982b42c72a28a7172316558dc51b710ceac9bcf0d1f76d45a025685089. 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/QMAAK1586848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48c6731f186fa2bc84bb96ceeb655518dbb35eeae52ece60518f77302f86db7. 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/QMAAK1586849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6daee18f4410f6952ec4f3789638153c777bfca5c571e183aad5685012d06494. 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/USL4Q0752497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40b087fc79dcff464d29d6d0f9a22f30388de254dc94f4d4c3f8608ddc31202. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USL4Q0752498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a79186cf68fdc01f8181eabc374b509ada3786417874c2d56f28991eddca4c. 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/USL4Q0752499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a043b2d5d45be892b41c8cd27ee19be942465511c5644e527c2dd5d7f50c90. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USL4Q0752500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e0ecc30ea90d778788cd088cb2c875b2fd1b54329b3bcae48ed2e3074fd065. 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/USL4Q0752502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b708824c4b53577b0b67908e04d76f894c06d508945614a2b24ea3b4809040f. 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/USL4Q0752504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a0fc2545495ed95a3357af1fc220085773ea349809fc01da43a003aef256f6. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/USL4Q0752501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b95c7802afa3a55357d9eb1a2744097bfdacab6f4bff7e0a2b83cdb4e8366f. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/USL4Q0752505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac6b8eb8d372dd8593d0c39e49e2e01dd5a2f261afcb26904c045c0a02495b4. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/USL4Q0752503.