Matsieng is a Setswana traditional music trio formed in 2005 in Gaborone, Botswana. They burst into the scene with their 2005 festive season album, Semakaleng. Known for their explicit lyrics, the tri
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 0x585b005864bb6cf26bf11da330545a43ea3db995c2b252e7c3d7ea7fea34c99e. 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/98fd8a32-f5e9-4438-83b6-248ee8309d94.json and https://artists.proofprofile.net/proofs/artist/98fd8a32-f5e9-4438-83b6-248ee8309d94.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 0x8f3034b1ebf1bacbd869a9877b9a3f1ece174f28123940a35dc54aaaf7101b0e. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/DEH740703092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7013fa8710f943292245c45a866f4f12588f23cb1f4f5db1c894d366541c6a6. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/DEH740703093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc16270df30e0058732174c9024372aaa02b74c9fd28443fee184371e6bb77030. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEH740703095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2301346200f912a6bde1ea85df372860d5e3987340eec3db235449386c6586a. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/DEH740703096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84cfa90139a4e9c7aee628054bce89e36f8edf9a1b81a3d4643a2b52b539764. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DEH740703098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590dda1ba6219f01e13e5b004334eee4e090329e4d6ce802992c89a8f4e537f7. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/DEH740703100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646a672539c52a3627f79c658faee3131c59601350d3caab68d24643bbcc5b8a. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/DEH740703102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b338de182e2957740b7491dd5378d7899075db5fdc3d28f0199b1f18c9d9e4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEH740501864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215f7abe57326d365c993b844b5b1e69ffa46bfbcdea3338f36b03eb3c7b7007. 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/DEH740501866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63e3b7073f0de56794cc0820b606e25431a13873c8b0811e0acdc255befbd81. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/DEH740501867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0581030f12e3d396de8793d33d5e1124e874090aca4492c3c8b5cef6151656. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEH740501870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea94cdf4fcb5e4eb14f360ad1b38df3aa6a70ed127a43e7200b4902ffbaa80bb. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/DEH740501871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848577edccb60fbe4f5daccd517735c079cde752ef8f911676af6764aa4e7d5d. 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/DEH740501859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb043a7b1416b7b51a010e1ee79dfe4cc84f0eb183aa72884d57c4decdc145e66. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/DEH740501862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6844d2ca3fc8f50de536d7fc25e24a97669ed35a3fc5e8cc503f5128800361c. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/ZA87X2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63657265d28fc8dcf7ceed945cd693f26fdf248bd96f5e8788aa92b7a55fb8f. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USJ3V1369177.