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 0xe0ef3c5986f0a1084462e7a938b0acaff84d4c138af15b43fca144e9d051bfbb. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/105ac965-6ecc-4f7d-a047-cd285e47683a.json and https://artists.proofprofile.net/proofs/artist/105ac965-6ecc-4f7d-a047-cd285e47683a.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 0x2c9be5b288ccf621ee7cdd6789c2bdebe303c1dc474bd48bac76fa374bc0dd1f. 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/QMFME2221637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81a7573f3ddd86ec5b8a20c862b934511c10e04443813471413ee7ff7c78b09. 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/QMFME2221639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1384e11f6964c8275c1e580d045bde3a2930f132c3574e929ba29422bc44bf65. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:59:20Z), 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/QMFME2221641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf891f9f0f1b42aec448be52f5592ad662195e50665ca5676282d6ae6a45de351. 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/QMBZ92250885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda656bddbea17beef4440c3ec6bc88c8a2681048dfb9e21feea2604f8dca37d8. 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/QMBZ92250886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a778c584c035c3e2ae4c2f0480eeea7d4d2fb435d25f7ad6ad01a7148be885. 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/QMBZ92250891.
Devant Le Miroir (Remastered 2020 New Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x669117e77c378c49528f6e14189c239d685006488443284e1516ade612d1e889. 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/QMBZ92063683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa855d8e75e0b391b126bf35d77f3200921844958aba7703675c79beb537b50. 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/QMBZ92063684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6df6b2e56c9b3d5f4110ffc17c6c22a8c789333a543bde0831a9dde633eb349. 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/QMBZ92063685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf58755dd500f83f2e891ac6a74c2f35d4b3d6f50a4ba06dbcc842385f9aa86. 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/QMBZ92063686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bbbd9ceadb737f45d5dff9151b5d3a85ef29b43239aae87eff24d5fde10a709. 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/QMBZ92063687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e383d092a4c32db4d93498c1e77467d27335b59e8870137dd9f7dd30f24c6f. 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/QMBZ92063688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee0d0db66c172ac2cdf11bc0a0a8e8d38d17ba0d42457465638b14a3555b171. 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/QMBZ92063690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b8386ca1171f79511204a10aeb6c4cb46976e157e44812e0b0d687e65563833. 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/QMBZ92063691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb43dcbf239e25c5dd37e4da71fb6dec39e484afb97a5ff2d59a15a83c1a4243c. 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/DELJ81968642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x948b0cbffc2d02ad093193ee38feccaa00f3892f3c8efbb4c2b90ff8d2e59abf. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:55:52Z), 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/DELJ81968643.