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 0x31260672973279cca4b523e4a19bbbfb01547bf6b6215b61eeb35c641f99b158. 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/c84098fc-9c19-4c83-9b6b-7f2837725519.json and https://artists.proofprofile.net/proofs/artist/c84098fc-9c19-4c83-9b6b-7f2837725519.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 0xaef84d97949ec17c8424bb818d014921d9b597117b3dfa0745f6b0f76f210e63. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/LBA0H2000454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22fa66f6c2c904186ab60d3f66ed150a3eca9d7be849bfa6baf52a6a2f1584a5. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/LBA0H2000450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaece6a56f1e5f71645a6044d24bb0a7cd56ceb774bfcfc1e90cef8511cc07292. 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/LBA0H2000449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1003c89527f4e190d9f39e88a3bdcf92a2227421604dd081f15c43aaa8a3be4. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/LBA0H2000442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9212a4beed0f83482cd47b574117a8f7d365e0497fb3ca89783f3741bbd409. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/LBA0H2000440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db66756eb94713d0b505e4e02fb3397df2b46ea5824e543556c47348e47bb44. 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/LBA0H2000437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe62f11f019d97e28e5bd94894f6e5ec1c6008d71dfbeaf8cb0ad2bf036d30dd5. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/LBA0H2000805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9fded461b15c305f1fe3ccad28fe5f51ca72d3cdb9411d0a37317312cec531. 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/LBA0H2001577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9884a23f48a266b8da04693990f8fcab5ff5aeba9fb7fc2893c5f16bf8583c2d. 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/LBA0H2002146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6206036bfff8fa23a65b45340f8280648f5155541af4b567ca438d4a572d89bd. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/LBA0H2002339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6b954ec7d1fa38aac20ff8b9b14e031257dd91513abc718ada05d058e73127. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/LBA0H2004418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65f17150d6460504dca1555d2c589960f6d2d192625e7e63d09a3b90324fa9f. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/LBA0H2006000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ee5ea8a1f48ccdfe90695f9b78324f1c8d3f8f0092187b02f07d8c5d2a8ea8. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/LBA0H2008178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e79cf4d134eb97db4b39feab3a39dbc4410ace0620b137e9e10be5acce3ec4. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/LBA0H2008975.
A toz (feat. Farid, Oussama & Aymane Serhani)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec04c59a0039a9ab5098a8a1de9e3888a570399ef8e3362b0c89f48a7a6db117. 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/FR6Q11500122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d945328b45efd2fc2ea57492846795d3a6ef7394d74c6c0bd67057922df700. 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/FRUM71600579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38fa3583844b63e35bf5eebb712d689fdeec0f7e4e49958b6886de1a28d23b3a. 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/FRUM71600582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa916e434278cb7d871c97ec18641556d80561ce2eb4d6bab5a39775008a563e2. 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/FR0U91800194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8048fa9f0a60eb5e550037a0be06a43e34abfe7c2203cbbf8debbc31e357103. 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/FRD3G1900200.