Nana Yaa Mensah, known professionally as Nana Yaa, is a Ghanaian singer who began her music career in 1994. She is known for her vocal performances and collaborations with several Ghanaian musicians.
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 0xbc42bab1f71ec822bf1a82ea5a723fe7fc7c9cde0d088eb229e3ff6619d317ea. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f7d8ef14-62d5-44fa-ad0d-b00aa48c1a1c.json and https://artists.proofprofile.net/proofs/artist/f7d8ef14-62d5-44fa-ad0d-b00aa48c1a1c.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 0xae3a835c730d3dff0d7e953573cdeb231959c6e62a519d5e8b7f729c1e5e38c1. 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/TCADZ1858007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423d0430b862ff2a50eea4e32fdcc7734aec0b1315fdee99863ba335c3007082. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCADZ1858056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d9f71c79b3618bdd83f338bb1c25ad66cdae0ce41e541fdc79668db0c946c1. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USQHL1807107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6700d9fdfce1f80cc83a973a18ee949c0a5e257d395bbd82255d9437ba46344. 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/ZA41S1827660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6304dfd74ac9d75223e853178f7111d88ff6615c008ec816babcdd169cee0281. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/ZA41S1827663.
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 0xbc19f3a9ead58c19ed19506af92ce18938cce31b3f0ab544feab53c03498ba23. 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/ZA41S1752738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81efa6e760a66d72f6a6e06be3779a68ade178fd5aeefd99dae57befa709d584. 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/QZHZ42093577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03dd4770aada3f7e29c5eb0cce27ff2cd5e4752ea2055eb8d23dafa6cf5b70b9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHZ42093579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6068457554f848f1ea16f34645564cad25121a9c01185a270883c57c4b07a871. 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/QZHZ42093581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x948748233ae00a5bc092a235685fdaf622fb10203b654515cec193825eabb8ec. 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/QM4TX1907660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12ecf78e89feb9f7514727e21f657110330aad228b631db54ec54616fe5e22a. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QM4TX1907664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7160f2b55123c4260fa9d4004a8f941525149300f9588a60bfe6d6f6f2b5060. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM4TX1907666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x125cbfcb601d7c0bbb7c56d1f7b12142ebb07c5c569d1de5507abfee3c26b2c5. 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/QM4TX1907668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe650cff35e6ff50b8f1e0383d4512de38682d6149c8c84651f68cd7d8529b776. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QM4TX1907669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b65033c369156f391d25ffe8183a6f8459f71dea2b29bab2fc91f0cbe9d520. 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/QM4TX1907671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954f4a349289d00c89785cd8c4a4c9ee91ced65e526c5698028c3ea48c548e90. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QM4TX1907662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63a2a23a724bd14403e6d1954847cba2abc376cc7e48df3a1b2e6ea790ca13ba. 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/GBMA22304242.