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 0x017274035ef7f05b0fb6708a31a82c79836fe71bfa195323a9351dcbc251617b. 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/99d62dbd-ef4b-4bc9-8af4-8ad9d14206af.json and https://artists.proofprofile.net/proofs/artist/99d62dbd-ef4b-4bc9-8af4-8ad9d14206af.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 0x6bc5f696a0537e0afcedc7afb65d587daf5ec9f1e1051a752d8f0a6d22f85a75. 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/CA5KR2241360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4324db6862bd2bd842e78547a88955e3bc7e206840eec45817412bee84c93f. 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/CA5KR2241361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df7f30344d3c05d8cf38d086ecc8313e226fbe702894a81e18bfa78c64c3fd1. 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/GBKQU2353163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd07b0f48370a3fd1844c74350cfd4721478d99eab259d8bc0a02685f07349f. 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/GBKQU2353165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0482352389d96d6f2ae43b8349444cc8ae7524e90be1f4091e7bca063ae8302b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CA5KR2342092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67edb9532574b2b47e3716e58ae247e8344134aea1ede1edcdc014f7e246bb24. 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/ZA56E2527397.
Wamuhle (feat. Just Percy & Mduduzi Ncube)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf20f8fc110e899649197fe4144bc1bb7a2ba18342efa07a150d4ea93c46190. 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/ZA56E2527393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c576dcc56cc9979f5e449560311c05febf643ef49bc12a27dac0bc226e4c95f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ZA56E2527394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3baa250efb960d8c6c8332556bb2c70778f50385c3d49d4649a59490f4a3d912. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ZA56E2527395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f5776729f4ffc495ae27577c2b88d563c6378df3f8517c46aebd28b8032bd5b. 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/ZA56E2527396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67edb9532574b2b47e3716e58ae247e8344134aea1ede1edcdc014f7e246bb24. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ZA56E2527397.
Bad Vibes (feat. Zito Mowa & Ammo Moses)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33861d2725600b6a6df85c0d5d10614c7caf17077923d8194e67f0bb56f56fc2. 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/ZA56E2527398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1595c04a628d4ef74b606012f27867895978e62f9d54ebae98265cb3271a5cbe. 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/ZA56E2527400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8323045072c0bf378430eea20d085947a42e8705a57d7686ca74d9e964e9acbe. 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/ZA56E2527402.