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 0x291cd5ff51f4c4dee9ce46147e33469ce30034f75d2b5e02672db0269ff9f27e. 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/5332c2b5-a738-4316-b5c9-60857d3ca669.json and https://artists.proofprofile.net/proofs/artist/5332c2b5-a738-4316-b5c9-60857d3ca669.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 0x419556518365d4ef41912ea7c59c9e3910cbae9963b34844e4edbc65861eed66. 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/ZAEPW2400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78fde7e0ff08d7aaaba25eff1ff1cd27a3d0522ec2b555b2cf3880c9dafd85c8. 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/ZAEPW2400032.
uKhome Lotto (feat. Agzo, Optimist Music ZA, Seun1401 & El.Stephano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd671ed5cacaa90243ff352ba334d1f761e760188eec13163b6b2a57ddd43a1a1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ZABZ42400016.
uKhome Lotto (Edit) (feat. Agzo, Optimist Music ZA, Seun1401 & El.Stephano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ea0eea8d40f83d26403ef4db02c31fc0e6b718328775f8bbf12ecd358e08ea. 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/ZABZ42400017.
uKhome Lotto (Instrumental) (feat. Agzo, Optimist Music ZA, Seun1401 & El.Stephano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17dc74b57d82bfc796d2d38c3b3efa7b119b6a5dbec15a76a0e2303525d09c7. 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/ZABZ42400018.
Mavhoko (feat. Optimist Music ZA, Ag'zo & Thama Tee)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeae125ea4c8da4ae5153909e6e29c477050078a14b8c0d4a75c0903070571cf. 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/ZABZ42300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752680e935391663803145865ae0dd1213f71fa978967ecfff8ff46e501daade. 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/ZAC012401351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeaaabd120d3a5fd86a5694e33417dd76398968816701c1119dc0e54a3e19a3c. 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/ZAC012401349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752680e935391663803145865ae0dd1213f71fa978967ecfff8ff46e501daade. 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/ZAC012401351.