Hamdan Attamimi (January 17, 1946 – July 1, 2025), known as Hamdan ATT, was an Indonesian dangdut singer. He became widely known after releasing a song entitled Termiskin Di Dunia in 1980. Indonesian
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 0x709bd8970df515fe93d8cd2fc018e40cbad5aa1ac714c4cbe2ab21e800c34147. 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/5451aa36-7e74-4c44-b538-27ab743895e0.json and https://artists.proofprofile.net/proofs/artist/5451aa36-7e74-4c44-b538-27ab743895e0.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 0x1ac7835117a33d9d6a514ccd153e91abf0f9183741d5847f2e16d521c777739c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:05:17Z), 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/FRX872155248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x326d97811ebbedb8881674d44390d5082a6cef0ba8ebf91765cb35a4ef9188b8. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/FRX872155254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe14500cfa0d2ff7238a29266b40071e758161a7db5da27c6d3c122e6644f29c0. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/FRX282264893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e28e2b21ebe18ddfaaf88b477416f806dabf77854f97d35a6556cdec528461. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:06:48Z), 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/FRX282264898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3caead820806c22c598972c5e8d657802e65134d7ea39dc610d1be88f8fe606e. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/FRX282264900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe32ad97d3c4507aa8d0a0b4655fb0517c7a0b5cf139afa63a04ba346503a21f. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/FRX282264902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897f28acf15517cb46796d8844f2ccc33ae11fd93c76a9fd7e7212f279a4c251. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/FRX282264906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46432ef44e12ba5de91cbd6aea78302888d18e4f927fb4c8d52b38a37d1ab4d. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/FRX282264915.