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 0x7f8f916dde49b845cbab3d67c151d6ea93d808f3110299d05134bada7460c050. 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/997dff03-7988-46c7-84f7-fc9b9748d6ff.json and https://artists.proofprofile.net/proofs/artist/997dff03-7988-46c7-84f7-fc9b9748d6ff.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 0x833ed4eb82494097987e256186e3316fa48e19f1a1dd55ea394784d396dd4588. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/SE6QE2372017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8744a4cf8b9d0012c3cb3d5f3dc23465a0ee010a77a1ebac517da11aff90269. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNWT2029975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a5ca266f234dd3aea22d54bd984f215a6b1e37124117476451795225f47a5b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNWT2029979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563a3864bca80ca7b5f7d8118cd6fcc69a9ec6b8e6f43eb33a2f48d053863a5a. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QM6N22494854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e5728c4f5b4652500e518210d3d50b17b44c63e4b038e30e1eaec43cc35111. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QM6N22431341.
Tango Supreme & Alxapo - Qeh (ft Boontle RSA) (Sped up)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e74ba15d126bb9353270a1ccd8bfc4a65bb8ee8b0cbce4a5d3c3bf978db89ca. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QM6MZ2406047.
Tango Supreme & Alxapo - Qeh (ft Boontle RSA) (Radio Cut)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1ac9552b48129db5ed101bb540845fd222baea4ae81cb07a00c0fd2872623e. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QM6MZ2405931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98200fe2c6f4919d3bb6d7318b230fb67dc24300dbf293d1d70b33a795299283. 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/QM4TW2474693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e3d16568e0b95464ff88003a8959ccb070359db3136dc6d319e44d8b73aaf8e. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QM4TW2433312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779d989e3f37017cfebab35efd640b7b3695ecdfb977bd760844fdb08b2b96ae. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMDA62347899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd623dda52545b58df9dda64df2205c3c9cf5c0476d17b9080926dccf458545. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/SE66N2287535.
Kwaze kwa mnandi (feat. DJ Maphorisa, CowBoii & Al Xapo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c310cac4da7e921422f10c0ce175345d03c4e307165fa1a4c3e3664d6845e34. 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/ZBN532400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a740626d9f11e0d7566eb042173cc773e11e6c3ccaa54b1cf7d1d31be21e9a7. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/ZA6EE2000066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748228aa15df6e7a42ac58fd0e67762d88415a7efa64fdd692712ba8dc15bddb. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/ZA6EE2000060.