Chad, officially the Republic of Chad, is a landlocked country in Central Africa. It is bordered by Libya to the north, Sudan to the east, the Central African Republic to the south, Cameroon to the so
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 0xff4ebdb31b0c348420cfda95c2cdc8127f35137bb44d95c205ebb056ce83edaa. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6f09ef7e-b54b-4b52-bfed-e54b704f9336.json and https://artists.proofprofile.net/proofs/artist/6f09ef7e-b54b-4b52-bfed-e54b704f9336.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 0xf4fa8deaabb6632f83f6eab2c19f71140503f2363109e7fbff3212496122a063. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/GX3Q92353286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbadd796a48d673debc87e84e2098553cec07d57539fc3ae922d6ecdb2f017d9. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:10:40Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX3Q92353287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700752451b84bf0761e11e9efe3943c13dff8a128cb602eacdc1a182379abce9. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GX3Q92353288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b54ae838b3890baeec67399dc86b2e87175be737396150651ded662de4e05d1. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:34:14Z), 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/GX3Q92353291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90077c0843d8451188154cc2d9002e0b0b4526764f82bac781bd2e88e9c9509. 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/GX3Q92353290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0cebe91f006bd29833858a60ca2d41c796a89ec39fc7a773e50c331e04f79d. 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/GX3Q92353292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549bc13a0e3a7e374585552d51918be5f749da9b914f13529bc4b8b0597ad0b2. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/GX3Q92353293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf994dd11a71554d3f8ee5210f4857ea9a905d8dd2a83abd446114235f55da90. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:06:16Z), 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/GX3Q92353294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d10568884d945a86fda832fa9c204983d988cbf0dc9c2b30fddc95eed43aa21. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/GX3Q92353295.