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 0x759a144693d0bef17a530ec82f63da606c06fbeea3fca96a00cb75ca60e587f1. 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/bb0a81ab-8c9d-4f41-a9b4-27fe53fdf643.json and https://artists.proofprofile.net/proofs/artist/bb0a81ab-8c9d-4f41-a9b4-27fe53fdf643.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 0x837b2db24b2a4c0d7d5b98326d7f047076d31c88c45bdc44a81921ddb02a3979. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QM6P42018840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb92f9342bf00bae801d0fa97144bc3e3506c18fb2016314f46d9d9a26ce9a58e. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QMBZ92091651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac93e0638ae6d8610739ba340726c7efa09bdf6d3c372b576b2b4c63d3e3d5f. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QMFME2086951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822b3804b4de8a605edc054cc0a4da77c01ead87e35ea76d601d44bab344eede. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QMFME2091423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef451bc5a54aecb8d9f2a659ea441eccf6398bd6267f3ee5afa14a45a7b6ed33. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QM4TX2192367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80618bb4e26738b00d1ec4504eb99610b873678c2dd0c147bda4e3aa9edb9630. 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/QM6MZ2147436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa9516f1dd7a661c1e8d03ade6910246160803c88ee14ccc67e1a2452054c17. 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/QM6MZ2147405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e2555e4a6bde6101acda6a621c50cd14e46323b92cf56110fd81675e5c9bdc. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QM6MZ2147666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d6cb0abcbeaa6eb774f2f2cef4e7ab5e56e3dcfa94157728dfe96c37806972. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:19:28Z), 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/QMFME2141817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b587e56f91eba531a6a39bd369013e71a19499f534d5b21eec9ad33f5179e5. 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/QMDA72176612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479b2b9449ad9beffeff4529b6ea12a57831010f7aa49117cd4da8a296b08bc6. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/RUA1D2243697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6429e15db67dcb05289508bd6ae5866de7460f953214698b97f38f55a961e49. 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/FRX762161757.
La Baldoria - Nicola Bascha con Danielle Milocchi per СIAO 2020
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab6c4cf45b9315d5dd2e70d73940d5a617870b4413f492b9bd9b9493c363c5e. 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/RUA582100133.