Chanda Na Kay are a Zambian singing duo based on the Copperbelt. In July 2021, they won the Kwacha Music Award for the best Zambian duo. In December 2022, they won the best duo award at the 8th Africa
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a41f73f53ff4b6e1182c9502641230844e3b21c3dd7d6f5baf30a2ca6c8303. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8e91690b-6e59-4ca2-9b81-00ae2a2e69cc.json and https://artists.proofprofile.net/proofs/artist/8e91690b-6e59-4ca2-9b81-00ae2a2e69cc.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6587faf7d33ecce0a18ec85766d255af653f7812fe62e5fc520333d6d8ea9e8d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAFM2167082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb075776c6d031b6215887b85f29913903f3e65e33aaa79ada1513db147dab47. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAFM2167096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d9f8878d908de81d06c80edd5db311ce823b77578f627ad4ac5f2aa107d9f51. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/TCAFM2167144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0728ab8b1f3fe3e7a1e8cd3b3a5110586541b18c067b49dffdc38a7c604624. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/TCAFM2167146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b6c8deeb8be03e1c25d363d0339342f107712be7ef984a8707481219f3421e. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/TCAFN2108706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0efc1cdacd3a8a1eda0be0f9c3430984e2173a49943cfac33cbae8edf7b15fc0. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:21:51Z), 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/TCAFS2157259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94079a78a474388dc71c9af15f15c8780f70a49bdb1828981ea71e83421b8521. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/TCAGQ2235228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ad6eed804e70748810c67f73221d010a93409711e1e78861bdf4cdb38fa1d3. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAGQ2235238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44c2e901a6b840c92086533d98d10be1065d78c0302766ea5fb04f658fad988. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T17:00:01Z), 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/TCAGQ2235242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2791ebee45a8f55326f1cf1ff9356b51e8039899eaf01398bb7d84f6c30fbe59. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QT65Y2584858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1bb21cad6577b1ac3e3e1dda9e6bebfd55ebdabfd20170ad86fd0be8a371d0. 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/ZA40S2402026.