Datu's Tribe is a Philippine rock band. Known for its songs "Sarsa Platoon" and "Praning", it was one of the bands that helped dominate the Philippine rock scene in the 90s, along with Wolfgang, Razor
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 0xda1ad41cadbee841b35be379b29ea14ff37c40d15c7306dbb62966b28d884d95. 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/1ce5f6bd-b502-41fc-8d24-f4c9894d67b5.json and https://artists.proofprofile.net/proofs/artist/1ce5f6bd-b502-41fc-8d24-f4c9894d67b5.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 0x5337e9e2148332ad09bb71efd9ddac604ddfe3fbf7caa7f97e881b8bac98d1fe. 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/QZNMU2033278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58038f19d2ee92898403d3ab29fdf85f196a109cb1f194ca1899cd768e869a25. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QZNMU2033281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c12c806914eb60dc9b9032c96bdf8b2e48bab85f07afb4a1a27e5dcc212b4a6. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZNMU2033282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56953e3735f40faab9ffa71c2a7821c74e906de1de33ba0c607afb7cd670dc69. 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/QZNMU2033283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe1ee90d8f37b817fb3c1f5b90d5ebdecf2081b85289693dd439d8b312bfabb. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNMU2033284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5cfdeb03a2fa984e40f84586591df8cd1263e55bc75e11fc19d49895dedcf8. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/PHU011413201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c398c16d8e9b6ce2397d9edcda4ca98973a7488a1d61d37bdac5d99a51203e. 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/QZNMU2045593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb368ee3c2ab0a7bae3c28bcae74d84ea0c1437d0784182c4e3e0720e2a4ee70a. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNMU2045594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66bb9360781084cea8c6bd2fce34456ea3f5d17f04997f13c7e0e215df4d86f5. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/QZNMU2045595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be87b44d17a80c12cd0f5ea0091df520827b0e4ba3cc083ee79433f6f544c6a. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T13:10:36Z), 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/QZNMU2045596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0090b2ac04ee3967d31b0e40cc82f97693fb6c52bc897f4ce44d82f5dc3c084. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZNMU2045597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x095964cd95f0459092ea58dbf9b585fabafdd3b48eb26f08a05f4de6d05d8fcf. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNMU2045599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa877f40807d07c741890fad97dbb030904e1bddb3ee09de69a4b27b2a9ff8962. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZNMU2045601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x583c36590f75d0a37929d60dd9eaacf4a9cd7c6b3df03128da949167958d7c22. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNMU2033371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d36f471f4219f3d5412cb9316d6b7708776ce8b34d5899968a2beb045ce71f. 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/QZNMU2033373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e1f4ae3953e7134defa2a20d006c66fb66f5b83468dded37476775dfd474cb. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZNMU2033378.