Ruben Tagalog (October 17, 1922 – March 5, 1985) was a Filipino actor and musician, famous for his works in the kundiman style. He was also one of the founders of the singing group Mabuhay Singers. He
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 0x4901533867a6d327b0cca23291afecf168c51901ab66a524cbbcff4471d26e63. 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/3d166e10-8c08-4ebd-bc24-41d73c63d73f.json and https://artists.proofprofile.net/proofs/artist/3d166e10-8c08-4ebd-bc24-41d73c63d73f.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 0xdc022ceb1e5aa92cb2dda32d705ea72e0874f33409d1f24050cef8d517b15687. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USCGJ1048925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4a85e9142228db94f635dc376af72b73ff6cdcde23beeb6d409ccf6bfc81fd. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/USCGJ1048928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca99f71b399de0ae6baa02a208baa1e3c6adfc82d85b185d98224e540310ce4. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USCGJ1048929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d5b6c0cc926e92ccd449360442d80ff0e68a179d4435e68dd3dda49ee8f6fb. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USCGJ1048931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ccbe7e91b6c97b652b959389d516fefcd521cc25410912fec1f7ce8cdb8e01. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USCGJ1048934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6197e433320a323e02d1a9a8b3b2981d770a8c5326f31f78fbb8dcd05f55025. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USCGJ1132525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6571eb2d541be1e3bfee20877dfc4fbde423df0347c85390bb2163cd57eec474. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/USHM20817386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28983b6dc64138a62f74c7310b56b8325f81933faf325a9453529dbea4ae588. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:28:48Z), 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/USHM20817389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1bd64f33abc3d64b1786efebb5546bd15afb2ba618b09017394743c4d701a18. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USHM20817391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179c760fa956af29f33acbd60e12d63219794555a41a7ada86b7f07cef922a22. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USHM20817393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1793a8ef9c90eaa591dbab5ebd563dba63b3b950f1933e3576c8edc3f68cbd8. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USHM20817396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3b06a316014768530b2f393ced97e20bd7af02f0fb7258e6f4ebcc9e1c61d7. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/USHM20817401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa686c0f3d1338ade311a88cee333b3319f94f6d7ba1340ef7bd28f0d585fe46. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/USL4Q0827054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e76956b91b813e1d58046a63c9fcb01c8c5f9a5b1871992052780c6d821358. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/USL4Q0827055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f467ff7353df8aeac8ab84ca62c6bc56b3f05365c8c6f686558a10896c2059. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USL4Q0827063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b94c810621173a229fe317f3725811919f17a254cf460768aa99e9282931d8. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USL4Q0827065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03aa3bf85bab0046625423d91e802d330f8f45df18113abd65d76c83a9f76f9. 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/USCGJ1216979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d258a1fbee4c8d64171927bdf30f7566070364bd4310386e988caa43943f49. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USHM91254547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea79fd3db6984c92da3011f89e2c7a711743152987db3c949b0bd2b9f9e5dce. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:54:17Z), 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/USDY41568970.