Mito Sibal Fabie (born 1993), known professionally as Curtismith, is a Filipino indie singer, rapper and songwriter. He is best known for his debut mixtape Ideal in 2015, and his EPs Failing Forward (
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 0xe0c7ebb14b5191ec11763552f231a7a00ebd5761cf7c51420b0c3b8be328d119. 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/c3238859-38fa-45d2-85a3-0afd311a0540.json and https://artists.proofprofile.net/proofs/artist/c3238859-38fa-45d2-85a3-0afd311a0540.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 0x9dd4d2eb319bea3c2ec847437b0c43dd9bd8bd882bb07fc9ba06ec9ed0ad5d4a. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/FR10S1539864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec0a764c6595a6e973307ed05d278e8e6d7d7cd041a43712c8440a2e128cd24. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USCGH1782263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde0a2e2e8100331482d252bbd6c282f757ec3c5dcd05fe1836993cc0cbf6e9c1. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USCGH1782264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03671acee7aeee11d12667522567c2fd1074ecb064702a91e1a3c6b902f5421f. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USCGH1782265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc9512bd0b7e30948731674028798600de48565b24bc6fa89b0c2cd70de868b. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/USCGH1782268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x287a2a4c48b114883c4c7b705e0247c5c2b82967259ee50aa6639f464c890d99. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/USDY41770757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad42a2b15363b3c53cb27f1735f0bed2d1eff84765baeeb2c5069a502161bdbf. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FRX201774691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ae21886e69449fbfdbf8b12770a0f0cd5068e1beba6928e82b4be87d431fff. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/PHV031910674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60925410973cc00cf8b7f15c6a458c427050d7a781bf68ed346b4a68b0a4ac05. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USUYG1271218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3faca57b6d97b4048c5581b0405f7946fbfc06353473d64d4a28ed590a08e1f8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FRX282071590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd78239d8426cda1707b9c5cdb9ce08bf47dcf4472be703afb325c9ece680c30. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/FRX282135580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5adb878afb19870059c17360532cd8399bf546624e2707687f1fe22d8f49b0f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR59R2306830.
Sunday School (feat. Jordan Dennis & Curtismith)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c5d8c7461f8d021c0f2a05382b0858fdf21c0001775cad8af863cc819a37bb. 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/AUBM02100022.
Headspace (feat. Nadine Lustre, Curtismith & Massiah) - Remix
Headspace (feat. Nadine Lustre, Curtismith & Massiah) [Remix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d799b65cf7889cd166afc70312cc4b8a3a7f811d2f766514c72c7825df0d70. 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/AUBM01900219.