Yaw Sarpong (died 20 January 2026) was a Ghanaian gospel musician and songwriter. He was the leader of the Asomafo Band. Life and career Sarpong was born in Accra but lived in Akyease after the dea
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 0xa61f3788849ef67ef91ec945c75511c2f2d8345253255b707c05a194fb72e749. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1440f7f9-dc92-4040-97fd-c927c824cbef.json and https://artists.proofprofile.net/proofs/artist/1440f7f9-dc92-4040-97fd-c927c824cbef.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 0xcd57ac1fc1a552a122333479c92ec1d145a1de208c669ffc4843cefaa02add0b. 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/DGA062289346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc8f0ed9b0592f68ceef650f5374146683ca3843fa53e130a230b77e0835aeb. 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/DGA062289347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006a5a8212dd4b1be1a0aaa6e17f32b47269a7a7e5a97b88065e1b828a645334. 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/DGA062289348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab861dd28b03331024c04fcdc59c68c69f391cdbc3ce18d8a28feb673b855c1c. 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/DGA062289349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3094b1122bea90956e4cc290d0ee72b981cc66c9582518b68b53593dfca01d81. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DGA062289350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f8cdf28b9e8c6ac628b4b7e8fd7ef0b527cf6daec5fa24b0477c67c5effc133. 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/DGA062289351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578178849cfbf31c024252a7a6b49126fbeb198375e43df170b80de902a49439. 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/DGA062289352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc1a24c10fec6b323a59cdf39c52b366abb18ec7c20a8e709b03d1a49117f8a6. 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/DGA062289355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c43ecb52644a5311e281950edc6124f99db2a5632572a2f60d24cc34c08e66. 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/DGA062289356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83fa0ac82977eac7089d5266566b6954188a52e1e4c6551b3f79a70cd104873. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/DGA062289357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8d8d311b55e7a9c00ebc6e610b16e0100c63c451f975078735dec59a8f4172c. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:21:09Z), 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/DGA062289353.
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 0xafbfa8a4bcf2a23062ee7013ae6c69235393168166677415bae34c0ce76f8402. 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/DGA062289354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1edd890608856935b166dc575e58994ce5c7745630d5d7b0cdfa53daa87e2583. 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/ZA56E1504117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5360dc167e9ea69f2ced90b476ccd324b59e2d4b8978bbe5125c49b8a600e6bc. 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/ZA56E1504118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be3a99706957a2ed2657f59edbe77e5ad3ebf78905a57dda813749742f74ad8. 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/ZA56E1504119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99b954d3ad436f22e9167ba0bd084a15257ae22e2b5db9434243bcadb82b298. 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/ZA56E1504120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597228196b97d8734ea0d263ba5b8b1b16bf07c077e145c5c9078c4b7ab79619. 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/ZA56E1504121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad9d211e7bf8a8aa0b11e3c63b968e351887d7e0cc141d86b030835a0b4d4b0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ZA56E1504122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6357a97023559b0497d8315e737eb1344bb16fb029a8e8532f5dad87124873cc. 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/ZA56E1504123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77da4a0ca231d803b255d56d5b63783153398255e2830d2b9b0f215d5a067e73. 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/ZA56E1504124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126175492ac9eed726f54c10d7ef8c2e07683a6ae1ed788d9da230f286d19408. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ZA56E1504125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86159a4a08fee26e678e619ad44318cc9b1f490b392bf8352f9549f029eee1bf. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/ZA56E1504126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ce7eecd79a0204a747640b0b1415e794262463541d8218f9cf11b7877d3f83. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/ZA56E1504127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x707d6d24ab5c8d06a92ca5564ef980f30804c41dd8b9c2bfb8819c059a932954. 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/AUMEV2494345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51425829ca3302cce6221daefc9a70709888449a54668cbb2cc1c12616c69f74. 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/FR59R2116545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3d4015449d714b4fce14bb89c7d2beb98b16311e97173c43f0b7ff7323c271. 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/GBLFP2132786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a0f243f9f83fdf826a38392a1204bfaa99f9d11fb877466c56f3f1e29fed57. 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/GBLFP2117337.