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 0x0e57df3fc0011e602cbf4c283820dce706dfebb5a9257be999ea23ce596fd609. 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/d526db3d-eab9-46b9-bbde-16b4018c0397.json and https://artists.proofprofile.net/proofs/artist/d526db3d-eab9-46b9-bbde-16b4018c0397.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 0xbd20cc82ad21408c582380b55ab551375cbf447b981e4a1396ac4d52a1b4a400. 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/QZYFZ2482333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad198a725f4b496a46a0a4b1674413f6904269bc1519cb87b55506e15914381. 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/QZYFZ2478628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7b2a7990b55dadc0f634fc49684dc5d7b72fa021ec20a03da20a871353be70. 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/QZYFZ2449971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dfd0731aea24162094f7605fdf346288fc6837776251886f08e7ba348ee9421. 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/QZHN62426027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c5654e031cef54f2eb0625e782d82cd24b1ad637977f3cef19101df85f94b3a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZFZ62473633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9d8685dd24d2ca04c73844483c5bd2c4560beb4e9bdbd698501f3dafae49d0. 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/QZTBA2393363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc6086c07dfeeaa8daaa0e817729681eadbf837f495f18358d4a1db43fa438d. 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/QZTB62374463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb3747979940ed2b145ad8ded103f1624222799660363a12142f524761adae5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZRP52314202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b74abc7054833ba72668d39d4920c20b7a1a60bd29eefa48c0069be6385f745. 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/QZNWR2378545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62dbec08f132f6710ed02f3d73fabfc9a3921b94e6772c8af9716b8c3369345. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZK6H2308256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10e1ee7eae58f255274442439e1eebaeb4884e1ccc4163f9f0ecb1b46e7993a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZK6L2362603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed404a81e7c59e49df3da1c126203ee84f3e8ad581b882fe17ca911189d1e7a. 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/QZK6L2362604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a3faede8f36e92ca8e2b6d4dac8cefd9b0d765f27857e2bad10d2864893cd4. 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/QZWDW2335796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30becb6b8c2fb40eb7d23121e1243829316b033af12568813d978f9cd39332b. 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/QZNW72372183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b67b370bef07633ab161078c6ee83935ef3c105ba6e8c551dd26346599420a. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZNJZ2223044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b017ff8267011d13eb26dca2c8eb7419185150c4cd4b31193afd22cbee653e8. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZMEN2351278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c7357f437c43688de7fa4c14caa0cbd78082ca246c20ee0197811cd6fdf4894. 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/SE5752255559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3eda1279471bab2acbd7d0996379d056bde40c94f91bce6df96fedd1d510ea. 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/SE5752255555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb151ced28d49009b4321d24109321957859be612f9892b3f44b7b5ac5a85368d. 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/SE5752255580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4c7b1f2cfbb94e8d7a428d51380a3e4b75535f078736ee35b94120f1aa3e62. 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/QM6MZ2482220.