Samuel Marbella Mangubat (born 21 December 1990), better known as Sam Mangubat, is a Filipino singer and songwriter. He gained significant popularity when he participated in the first season of Tawag
{"copyright_id":"0x7ed25d8746b4a98b105ea3a85eaaeadcffaa9d79521a1b571daba1f35daabba5","name":"Sam Mangubat","registered_at":"2026-06-12T12:05:26Z","symbol":"NIM0292594","token_address":"0x2b7335f304af868bb09afc28e042f8246cbe7d9c","type":"artist","uuid":"e3c2a8cc-ede3-4b4f-bafb-73b4b5793d6f"}
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 0x7ed25d8746b4a98b105ea3a85eaaeadcffaa9d79521a1b571daba1f35daabba5. 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/e3c2a8cc-ede3-4b4f-bafb-73b4b5793d6f.json and https://artists.proofprofile.net/proofs/artist/e3c2a8cc-ede3-4b4f-bafb-73b4b5793d6f.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 0x8ba806b2d7d2922d85afbfc391260ad9b69fe5d089ce5961cf0a20c0e56a3b11. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZARB1867540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d69224d1b033da1da2c3855a87b79b202a85ca65ee024d9ba5f3b0d0a00ba5. 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/QZB4J1873330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf061a4e71bed82e9a5a8f5df0b450d361fa1a191f0a448b23fe1bfbe29377208. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/QZB4J1873332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3faa7f22a1edc1783abfcd352b7f8e48e263ff9e5cc7d77d93542a0d077347af. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZB4J1873333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0a268dcb507fa18a9ac716e9e21c6d7d091c071009ff00fa08bd496e7cc59b. 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/QZB4J1873334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe91397997a82cbf5ab65bd35652edd5a69a375af9f084f894ba52875ffa18d80. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZB4J1873335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c3240c8abdda728284589772c832d67c05fd85b03a015158c637456b71b3f7. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZB4J1873336.
Daniel Padilla Hits Mashup (Nasa Iyo Na Ang Lahat / Simpleng Tulad Mo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc769a48a2a6466940830817af8d7fed99793fad0b7553954c5f3c4c3385be894. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHNA1914824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5edc01830eb516ec6d9f028d21ee2be364932c2057d17d1d566a2f03fe8639e7. 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/QZFYW2080735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ddb84feb8831eefea8fbf6b8a849f14e019369907204b886365324f16adde2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZMEN2091607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18abc1a1e976fbf3e6a857aa5ea32267e31dda7c9f3ac226c0e7d976466ef7a0. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T12:33:53Z), 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/PHS032001400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2532fdae0f3d908ac229c9367cc351c45d8f0413f9c59040a4e23dacbf1ff1d7. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/PHS032001531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61aca48b163c8b02991526abf58b341b7f0da8e40aeb0678ff6257e6d971601a. 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/QZK6P2103226.
What Do I Do With A Broken Heart? (Acoustic Version)
What Do I Do With A Broken Heart? - Acoustic Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b53a1f8ed09313fbe758d0e83b1acd8835b692a8a63250023150205802d226. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZMER2192544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767024b0919ebee8cbed98194189585824a9e5fae81d496f9b22839ff72cf848. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTAY2327730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34e93c0a895681634d4b5d576cd7e00180c0ceb097ac305fdac7a2602ee440e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTBD2376334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c3ec69af396c56c2853ebc0fd307cf5126e31f64d92c9598c6dae05606a7b7. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZK6Q2448861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d0288c57a6ca5cc92554506f03441489955b646026b797024ad25b729582e0. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAIK2483272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa8ff652491041abdf4b4827a69bf80cf9d856a42d7d0525706abcdc360a9b3. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QZTAX2406378.
All Or Nothing (Instrumental w/ background vocals)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95757df654dd6eb58a6de40097c505837d5ed586bfb91db4679b13e3e5b68e2e. 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/QZTAX2406379.
Nanghihinayang - Instrumental w/ Background Vocals
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bdbfc7a8f48131b1ff6da3036064053bf4affa9f8dcbe35c015328930f36256. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/QZNWR2512480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71aea136871f3cdea0dd49271a79e07a5796e85a105c63b39c29eda93d302df. 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/PHS032202164.
Himig Handog 2018 (Love Songs & Love Stories)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe269a3d710681945fc980c916f748b34665b0824a426757542cfed2aa5a2ad6. 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/PHS091806123.