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 0x9af1c2fdc2ef7e0f8801b1cef3956ecf4c061e4fcc160f82bf7435713da95dab. 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/cc23e9d9-6674-481f-93bb-72522b8ec8cc.json and https://artists.proofprofile.net/proofs/artist/cc23e9d9-6674-481f-93bb-72522b8ec8cc.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 0xb4c3aa1d97b6a930a8b7de0da480b38aee68234286835297cf124c3151269abd. 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/ES5051501598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822a503d368462ae9959263695eae2e93bc3d5df7af7b23e1105baa8fc746558. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ITI341600138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a5c039c8f216b5f1a3149741b401c43063bd42aed640dc55e9650ae11a290c. 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/ITI341700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa8e710d670e401b0b9087c34a1186624b6f3512fccbd90dc7d49f67c8d8f0f. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:26:15Z), 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/DEAR41888755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5060519ab5f49dff41451f1d7e6831b6d848a2fa5522c5e74e2c2b9c16a2a341. 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/SE6HN2110755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ff506b3c4bbab3bdc51a701d71467df86122c9c7c52e7941a96b8d3842be71. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QMFME2186583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20ecc806488cf69df5694101f5550e2be4aea544300b792395039a84e8698b4. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:50:58Z), 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/QMFMF2111561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d25cc153656007e52111023eebcd104977ea671072ddc1be5e0be05ef99fe0. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/BE8LH2200100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa11bd1a84e892189ed14988426d01f0b8cb5ecc95d25cd21fac0e27bd71540b0. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QMFME2295642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5130d9ee5b1a6b43738fc9fef60d58274f244a406fe7b084af0bf966293afe. 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/NLT2H2400528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a5f535b3b5a83bdfeaf2a74a5c9fbe3110ffbff50524bcbbc3b2b532329cf7. 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/NLT2H2400655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x633bf617103246473a684a9760a29a592cc0d68dd2535df6c671790f50db5ac6. 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/NLT2H2400857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e0916ac3f4eb135e0fe2f7b9f6e411398d3ca98557e28c8cd3f426fa2d6cca. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/DGA0L2490902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7dfa6ada36338510077071eaab0edabc55bd1ee3d789afe07dbad6e20d5a186. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/DGA0Q2495857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f63cd93dcf04520e417e625d9f1ceca0b02aa25897b43b5bc6a28b0ec0599e4. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/FR10S2527232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe134a3bb50e8a3c9c1aa598a69359feef21d9d69f123e083888273a235b6fb11. 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/FR2X42578840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1338e14f6afec8b5712ccc371107547c0c248ebf37ed2755d6ea69f09d20c69. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CH7812543167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde82e2183622ded691bc0f8550adb98f6b59a2cf9baca5a1e8e1eeb869a99794. 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/BE8LH2200134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc2e9ba4d66b67a2ecc9909438473a0f5b54c6bbc615f0822a447971dc4320f. 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/BE8LH2200095.
Lounge Covers Of Popular Songs 2023.03 - Chill Out Covers - Relax & Chill Covers
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc2e9ba4d66b67a2ecc9909438473a0f5b54c6bbc615f0822a447971dc4320f. 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/BE8LH2200095.
Lounge Covers Of Popular Songs 2023.01 - Chill Out Covers - Relax & Chill Covers
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc2e9ba4d66b67a2ecc9909438473a0f5b54c6bbc615f0822a447971dc4320f. 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/BE8LH2200095.
Restaurant Lounge 2023 Vol. 1 Background Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc2e9ba4d66b67a2ecc9909438473a0f5b54c6bbc615f0822a447971dc4320f. 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/BE8LH2200095.
Coffee Lounge 2023 Vol. 1 Background Music - Café Shop - Coffee House
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83346138ee9a5fd7c5b2537d74a78cee02e6df01974381c6cff0521154cfe0d9. 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/BE8LH2200137.
Bar Lounge 2023 Vol. 1 Background Music (Music for Bars, Cocktail Bars or Coffee Bars)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde82e2183622ded691bc0f8550adb98f6b59a2cf9baca5a1e8e1eeb869a99794. 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/BE8LH2200134.
Restaurant Lounge 2023 Vol. 2 Background Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09b5f441e8466b4912dcd61f546d9167af3681281b82263fa748dacaed3cb08. 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/BE8LH2200135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde82e2183622ded691bc0f8550adb98f6b59a2cf9baca5a1e8e1eeb869a99794. 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/BE8LH2200134.