DYUM (89.7 FM), broadcasting as 89.7 JU FM, is a radio station owned by Palawan Broadcasting Corporation and operated by the Municipal Government of Mabinay. The station's studio and transmitter are l
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 0x1bdc187f2501c90dc14cb4d9b6eb013a5abe4f958c239b998c6f9bf72c2edf62. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/49a577d6-5e6e-407a-a257-32a08e0da190.json and https://artists.proofprofile.net/proofs/artist/49a577d6-5e6e-407a-a257-32a08e0da190.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 0x3a19a778a833dfac251086bba6ed1305c32d10fdcd95af1910189cffe110e694. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:41:29Z), 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/GBMA22564040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f1e78783ebd198f5a79fd564ad265021389363396980af343c1b4be9118251b. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/GBMA22564041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b53dc08ab2ea3394ad14aaf322c0177b2ba1c995b4f9678a3b7621646a5cfc. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:57:20Z), 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/GBMA22564042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666e1a0b5365120e1e42f8f0e5b266ae0497bf1c5b3e389174538eda5fedaaab. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:58:16Z), 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/GBMA22564043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7922b9fafee7d10b2e9e62719ed98d9c638f2ffa90bc986c9c85af92436fcda8. 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/QZNJX2512701.