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 0x95650c1f58e87c5162743d8208c82ccc46ade159c92ca3dd329a86f4d2e5cc7f. 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/31bb9342-85b2-4e42-8968-c951569ce3ba.json and https://artists.proofprofile.net/proofs/artist/31bb9342-85b2-4e42-8968-c951569ce3ba.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 0x97c50acd3480970c51897ba4b7941d8a354430b38d00cfb5524cdf3e96665095. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/GBKQU2104739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808e8395f22227a013cdc00bf5e5a3bc3edcb25766cd23d645b8299b4d1f293f. 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/DEY472371651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389a0ebb3ce41d6d37f5282f134309e8a989834623e6fa4877319c3252eab791. 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/ZA56E2416238.
Stuff Sama Grootman (feat. Malemon & Mdu a.k.a TRP)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd543360b69d617841bf6c2661083e0e4ef82e715dc287f1404805df906a23097. 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/ZA56E2416243.
Tata'Poyisa (feat. Mashudu, Tracy, Mdu a.k.a TRP & Mpho Spizzy)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd110f04448df8c3bb9d2afe748f130e0d751f0a97202cbf9946a2dbef248a8ab. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ZA56E2416245.
Amaphupho (feat. Dinky Kunene, MKeyz, Tracy & Mdu a.k.a TRP)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643f5c6d5d456083816cd97ca97086a9ced87075ede85d76b5bdf3813b24616b. 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/ZA56E2416246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e422b7e7c1a7d50b32f39bd820533f4f891d684551b839af26537769cf5df9a. 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/ZA56E2416248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6bcc0505ab01e515c50cfba736e0d76293d712e5d35b835dbdde6b1e77f2ea2. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/ZA56E2416249.
Ngenzenjan (feat. Mdu a.k.a TRP & T&T MuziQ)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9afa83a0563daa5965df1c8bdc8c5a90f2b8ad1f2c65b6f995d0036c9ca38df7. 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/ZA56E2416274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823f2f01556d2bd05979f2802154f18fd78efa204967bb3a9f93fd23192be38c. 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/ZA56E2416275.