Nathaniel Hartono (born 26 July 1991) is a Singaporean singer-songwriter and actor. Hartono made his debut as a singer after he won the Teenage Icon singing competition in 2005. He would later release
{"copyright_id":"0xcb5eca6850cfca098b496ddda45a146d64cbde56f189accbe1a7503815df7d1b","name":"Nathan Hartono","registered_at":"2026-06-12T10:02:39Z","symbol":"NIM0264086","token_address":"0x6afffa1de04354a0036cfbd4d55761cabb5ab7be","type":"artist","uuid":"cdb2b39c-bbf7-4fa3-934a-5aa40a09eeed"}
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 0xcb5eca6850cfca098b496ddda45a146d64cbde56f189accbe1a7503815df7d1b. 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/cdb2b39c-bbf7-4fa3-934a-5aa40a09eeed.json and https://artists.proofprofile.net/proofs/artist/cdb2b39c-bbf7-4fa3-934a-5aa40a09eeed.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 0xd920bf6923bf1a9e021fb6b2677a1b98a7541f9265bb55b6ef3a28f5ac606227. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SGA052300079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf541652b3416caa39e6db226b9e121e41402b1acd5e35dd0aad6cf95c4cd7e46. 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/SGA052200060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x950ba055bca77ff5b2da1c123d71610e0f2e0ce331a0c36d2b7386b8097585b2. 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/SGA052200107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee682864ae514ef8f051965ea6d5c10b5bc246caf45942203e3bbe5d1f0cd24. 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/SGA052300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae74d1e626716fa1e2b4c695d58c96706911b8bcf690c8f6fbda7d5cd41a563. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/SGA052300049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8feeda8b94f90a7a23c99ae43ddeac9c72d93ca34d97f97df09fea2280a57a. 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/SGA052300095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e93cae362665589d956b9740c6cfbedc8cf4e6297c8fe335af9e9a586928ef. 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/SGA052300103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e2f785c9bc8045e5f3639b40d42d3eee13603e58e4a62572d09e289264641c. 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/SGA052300104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae74d1e626716fa1e2b4c695d58c96706911b8bcf690c8f6fbda7d5cd41a563. 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/SGA052300049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee682864ae514ef8f051965ea6d5c10b5bc246caf45942203e3bbe5d1f0cd24. 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/SGA052300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x950ba055bca77ff5b2da1c123d71610e0f2e0ce331a0c36d2b7386b8097585b2. 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/SGA052200107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0597dbf36468b723bfbea254f1d3f1d5a6198a83750283f593e1e681ba0ddfbc. 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/SGA052100034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2be104e5fe865a51f2e92a3fcbf8e391a365bf6214136250f0a02c9203ce07. 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/HKE672100310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943e62c5a95b40f749d2899106f4def219032e8bb9272fb1b74e19114305ae2e. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/HKE672000429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eeb3391258e627523b17b34a9a44c0eae9f9b173d5a4685a2aab0d2a0eee11b. 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/HKE672000430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5815e96f39de0ed8548216e37c9658640dcf08428d5f1c1e225c84553880e5. 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/SGA052000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdcc40e1e0838656ab54919c91b82059d5b0cfe8ae560dfadb75b2de4c05ba98. 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/HKE671900525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e0eec9a9438bbe18a1d3ea0aca665796b082132a82e47b2ab662c614e63a09. 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/SGA051900016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97a756c3e17633cb21d272d0fd88879c27210122e38138f1235aa39f44297d4. 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/SGA051600118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33066012e2658647b16e290f31bceb041aaa301556d4717a3f692074f4fbe68. 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/USHM21385501.
Layu Sebelum Berkembang (From "Langit Ke 7")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f4808f77b301502f9acd9f6ec823d9b10a56c7c3d72ec70defcd685b7e23cc. 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/USHM91279999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0498a317cef2cb70acb5dc617957dfe6b60eed68af41f93e95df5a48d2249b2. 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/IDA041236101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2be104e5fe865a51f2e92a3fcbf8e391a365bf6214136250f0a02c9203ce07. 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/HKE672100310.