Bongor () is a city in Chad, the capital of the region of Mayo-Kebbi Est. It is located on the eastern bank of the Logone River. During the rainy season (May–September), the Logone is navigable betwee
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 0xaa6196f47632bc63717a1fac70ab6656b69803f246cf9491d7d19c30e15b2fc4. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6183663e-f496-4a2f-a70f-ea751620e147.json and https://artists.proofprofile.net/proofs/artist/6183663e-f496-4a2f-a70f-ea751620e147.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 0xbfb03831439cd93c03482744f43408e9c15d3a30bba2ef1d22e8ef0c6567d128. 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/QZES91972701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1785e1724a21289b27ec0741eafc3da14a80691386093e0fac34b3325685de3a. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES91972702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x919de8b4020a338b4987610c84c009f36d5b35d314a95e1071385d39179e9929. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/HUMAG2100024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1917a02ce2f08575702ccdd1d129d45bca5d7d967e7035ea2470844c1c40cc. Chain 2 (Bitcoin): anchored in block 957579 (2026-07-11T14:35:38Z), 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/HUMAG2100025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41230bdb138c74a6f99f75801410a760005e8d8788a0c4b3fd35a4c163f8051d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/HUMAG2100026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9219e4aca986b95017c05dd96f42b2c54e1248e85004b12956449dff838464. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/HUMAG2100028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c1e23d337c3e62bf9fe93b240deb4232028a7b130af5aa0fe6a1909cacc978. 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/HUMAG2100029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a0fe42719b00c5450da88c1cf27ed5d3ecafa4ab31339890a65e82354fcb77e. 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/HUMAG2200069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf014a57441056fdd564bad8657dba0e8471876c6e3b522eca280c7040cbfb02. 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/HUMAG2200123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076478d42a575afec0b7715c89e59215add07211b2ffb6ee8c717118437b28ac. 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/HUMAG2200125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d166de093ce0b412dcb554edc8fcd9bb80bdb86f0cba782184e06c477382e5. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUMAG2200132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f66ff2d839af94692be2757204de0639c710646cbf08637fc0559b391cc3c8. 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/HUMAG2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d207fc65782a89ef79110a52604c76744d64cc4899c3dfb09a1d4408f1713c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/HUMAG2500088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf7c33caa82da14dc82d4bef2c5708e50765c9144f03fceb1047ee079f124e8d. 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/ATR981332547.