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 0xe01fe19cd8797afd0994c0ba5ba4621cf6786eb3d233446812e961cfe6ec2329. 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/0ee0a9f5-755c-4ebe-ace0-540ce97d005b.json and https://artists.proofprofile.net/proofs/artist/0ee0a9f5-755c-4ebe-ace0-540ce97d005b.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
TUNAY NA PAGBABAGO (50TH U.P. TRISKELIONS' SONG)
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 0x2b4bd8c08c97e29bd0baa93494d6e6c65d754c309f201e1df0d12757a21bab06. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWX2012193 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55082e867e40f87f500cf5e8438ab056b0aa9c17ac1de34923cbf52dd38e4d94. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWX2013659 — a six-check JSON result.
ARIBA ZAMBOANGA ARIBA TAU GAMMA (ZAMBOANGA CITY GRAND COUNCIL TRISKELION SONG)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde1b8a96736521f7b30546d523c972f2be06fe8788cd0ead17399b2683b11ceb. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWX2021207 — a six-check JSON result.
Ariba Tau Gamma (51ST Anniversary Song Collaboration)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2674429b444fcf12f0ee2c47c3963f224cc0cc6c893ea46c94c5b28266d4700f. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWX2012191 — a six-check JSON result.
Ginto (The 50TH Golden Anniversary Song of TAU GAMMA PHI)
KAPATIRANG TRISKELION (40TH TRISKELION SONG)
PASKO NG TRISKELION (A TAU GAMMA PHI CHRISTMAS SPECIAL)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa76be623217df7b91de2ae7db4bce7035658752d79c66d9c29054ad435238025. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6M2119346 — a six-check JSON result.
El Fuerza Chavacano (A Eumir Marcial Tribute Song)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15022fac70a765b33ac1b81d5e00dbb034f79cb6c1f58c7bff9e24ad1ee219e. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMEP2117210 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876ae3fe305dc93d16c4ee3e1f0901a9eeb493b3a25a554a998a734ab679fee5. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES92270752 — a six-check JSON result.
Triskelion Hymn (Official anthem song of TAU GAMMA PHI)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55e49388deb6b95b606d7cde6d6a66c4b2affa03d03edeaf3de2a40978a7588. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES92222805 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e698c7e7068f9b1741bdfee28ff06a61b3200059629d1733e7bca8a8cb9fe1. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMEP2201892 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f92bbe4a8c6fd7c80cc9bd929c0c858c4f472a83cd662f37f08a30427179411. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMEP2272249 — a six-check JSON result.
BATAEÑONG TRISKELION (BATAAN TRISKELIONS)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652c579ec2355f9aaa6808ec279515259cfadb4c3307bf8ce57daa16980d80c0. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWV2275804 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9518c6062250550106896b8e45b2b6f0fdc7bc76df9a93f08095acd50f9a16. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPLR2253586 — a six-check JSON result.
BAYAN KONG SINILANGAN (LAS PINERONG TRISKELION)
TAGA VP KAMI - MOISES (VILLA PANGARAP CHAPTER SONG)
Corazon De Triskelion | A Zamboanga City Council Song
PROJECT 55 (OFFICIAL 55TH ANNIVERSARY SONG)
Kaalam (Western Institute of Technology Chapter Song)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c685d39cd014ba7feb6fb58df4d44084fb045999609b3f4a6c3ccbc6b51bff. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ7K2583724 — a six-check JSON result.
Unido Y Solido (Zamboanga All Star Project)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa16f99b5770a64c6d01f6d885808ebcb68ecc2fd53b8aaeae467261ecebd4d. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QT6EC2511231 — a six-check JSON result.