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 0xcc7d17a120667ce4976ba1be8ad4eca3128ce20efd020085f1acdc6eb47ab3d9. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/12ae86a1-af6a-49c6-85a9-cc4cddafb93a.json and https://artists.proofprofile.net/proofs/artist/12ae86a1-af6a-49c6-85a9-cc4cddafb93a.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 0x60c44aba9bb7095c18af1699b2e920d9d236958a804cd0ea38fbb51c848f3a66. 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/NOHRW2404010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe949a7462116c2e902c2f12ef329ae0bd20197c24225cc9e0528db5d3f6c0eb1. 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/NOHRW2402030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696e703a8e5ae64b4a206e4f7c26614b5b5db818b12a77f874d21ec60aed1a9a. 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/NOGTA2356210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d2e5e0e14cf4993dc02f413b22aad8074c3fe3e7d998c4745b801ac866aa93. 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/NOGTH2116210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x577d7afc15255a835da8dbe390202bc011c9249118811eca6e21608befddae2a. 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/NOGTH2114910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa16faf9214a88f94c4ecb444e01e7919815aee9c9f0d98ec5e0f314f0947cc2c. 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/NOHRW1909060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb3dc841fc81e314722a3526df1fcc78d7b72849d7d1a17d6146793890a5572. 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/NOHRW1909030.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848c684402ec71716d8e47689dcd6f94b47292f18b1520a9f965bdaa438e58fc. 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/NOHRW1909020.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4963f4805766eadec46a3da3e248b8cf6d69b61c4ca869b03d20ef2175b01a37. 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/NOHRW1908020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b939ddfb47be8512018bf19d53b5cdb01fac7713f66be7725d48878f3208d8. 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/NOHRW1908010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6657f85062e55b124f4efc4c005edd653d24f2d2329405e9f733e93e17daa69d. 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/NOHRW1802010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c1707d26ea3fef1f324a2ebdbd6d1e8192ddff4dc03da91b582a9592cbd0212. 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/NOHRW1721010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8a789310de364b9a88c533152e0637b6677a9c72681a5df4a7e3c6f5ccf8b6. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/NOHRW1505010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0e6db76f97352e85b642e62caf8d79d06ce15ae1f916c34667f74f9ad0ae66. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/NOHRW1501010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d6a40c951d80ba82d2b0ac5b3e9ea39cd026f2ffc53ac35067939a5608d3ae. 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/NOHRW1407010.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x683ad6440825ff7ca7490734d727b09487a1716601462e619358b9cb7dab5731. 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/NOHRW2104010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8dc5e6398db6d64360ee40860fa72b72f5ce701e8360a68af658272da6a54d9. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/NOHRW1404040.
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 0x423dd9ecfce09eb22c3194ad10463baff95a8c1f50de41c8fae90a8be4fc7624. 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/NOHRW1407030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee97a30da529b9c78abcfb79b75eb8a3c874c763e8bbeb28f30b7284bb584e9. 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/NOHRW1403020.