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 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 0x6e4f1e8c9a587a3b56824904b659148651bafb1851b7d65b32c92486dc28946f. 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/eb8368ac-869b-4c40-b901-757431daa87a.json and https://artists.proofprofile.net/proofs/artist/eb8368ac-869b-4c40-b901-757431daa87a.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 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 0xe73e47bda79769e4da685c059582f07fa352e50166e8cd5a1b0b1c87df5f1997. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZTAZ2295146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366495f43af3a3ce49c9b4a7a0e8dc77d972227babe9b1f2975585be351d5f15. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTAY2293780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe8955b3d34f70a294cf0d094950c5e614f6e5f03e0989be677e7e22d7f50ee. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QZNWT2344678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7686d2020c621f50bac92249799f6d563352f1583f9fea83a70909b123a8289. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZWFH2390047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ef7e628b1eb3b3d6baf8fdf186900f5d59debfc63244b88fd931f62ae0b506. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZWFR2367032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4eec88e40728235c4f24a4b80d7e3e6909545f3e937c6eca1d60649d8e5e5d0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZDA82482958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d0283459462b21b507d62df84c1821422294f5ca87bbf604d82917ac665c6c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZDA82482976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5f141cb6102d33dfc374f415ea8a1c75605094bde3e9707f79329767be07c4. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZK6P2465456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a253cad42dcd40455da2feedeb03c5f21d9be57930b51fa4d176247162b73ca. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZNWR2411921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6418a051becb71ca4a092b15a636f397f484d1f16d7e1ef0d982b0ac4793c64a. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/QZNWZ2416344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x909ece1dd1527b35ace817eb2111d6815b026c5e2ce67c6120b887112411e43f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTB22408221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd391ed89a3038127879da111c67657a36a587e518cc2caf53d6013b9bcf2be. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTB22408223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a263204321090aefe3bcb1e9400856a6b2f2238c69779ceeb22ea903480193. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QZTB22418490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220c93c9ee1f1ef5bf8daad54a8151f26d21be934516ce1859a9a75828c3abe6. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZTB22406476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e67190bb4cac6b47d2a00028062567b73ae6bc459a6e7a836feb4f145e22ac7. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QZTB22408243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a1f4bab38640fa2285e8052a63753cfbac4bcddabe6de3ddf5c09dc4467c05. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/QZTBD2434741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41aa1b5cae0eaeca968ab4f7a7a40b99063c018888d115527607852fc8ecd15f. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/QZWFN2447668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9938425295044201a8af17510f270ea6cb03d9ff8a81e5f93a002e8388ba24a2. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZWFN2447669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e9297b3ce2adc796b0193ea485ae43fb33e89c646ba99d73d61d3082a1f33e. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZZ782494663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11fb9c0ba8b6da39410f46f75b08ccfd5d240495a681cc9f2e1d4d4914f697e0. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/QZZ782494679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4362d2144827545934f9be53e01edb56663a005a77f0cc9be6e0719a27a62df. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZZ782494678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65fb05abdb8f891534c4076261d8e48dbc15c9011fc0ceb6b3e7c752637e9323. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZFYZ2599872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e492bfc694849bc9e9de2930c81dc8a7d69d77700657b3cd5ab29d8fcf8f49e. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZFZ22501936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5608f905d97a075ddfcad5510468485c9e7e7e75d86d59511b0df04072268002. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZES52533299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c7ca0359899e7ba757bb2c4221d66aca56faeab33ac0ff78624b22890b4294a. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZHNC2547131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a0e6a50f2176c34e103f0776666a0ec6503a3f4407d38fb0b9f6bf0b8e2f51. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZHNC2547138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd1fe55716c2fcbcc3c4767c9d0431f21568af825e18c192a1b5b422bbddeb1. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZHNC2547143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c72fcedb053d21cac7d71df18d7cfb04181ecd54907fd2c361fabb9021d532. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZMEQ2508182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9bd72c8fbc7c8e48e539ee6cb9ceb3fd3cdb58eb0c4032e8595e2763cbfd04. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZWFR2512086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9493820dc8e5ee924bd7c594bf82a418dd6ef9638e3d79014c688c2ccca28a3. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ7R2501570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f54682f3462d0bb1cd4465184c45e25cd7b64307626e1f51c7f8952f49ba73e. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QT3F92554433.