Brazzaville () is the capital and largest city of the Republic of the Congo. Administratively, it is a department and a commune. Constituting the financial and administrative centre of the country, it
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 0x96285879757ee1b996b0d2eb04e7e63093d7840a7e311081a689e86079370ba1. 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/051a7ae2-425b-4c1c-978b-12a9f8aeca9e.json and https://artists.proofprofile.net/proofs/artist/051a7ae2-425b-4c1c-978b-12a9f8aeca9e.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 0xb91f2100d2bc00926fc7c897aff631b970ddaf61fbbe23eb6fe052ff99ae0e73. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/USHM80440229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2667693823bf7717a9e1ea45d2f4bf7e7bcc27bcc9a456468874b22d8897f2d0. 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/USHM80440234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fedc2d5cfcb6a1c4b9973f6076f5f760918583ba704b06da07a12e4d06284bc. 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/RUAGT2459669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5dce0b5af65873203f59181934027a643675f9746af61e85fe56be4907aa22f. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/USHM90657181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x365013f1749b211412d79d306f57ca9d31cffd94ace2feaa757bb530e206de7a. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/USCGH0666965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd3eee2d9d476bc5503995fe584984a3ef152b81d6934edd311ba49afc8f2949. 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/USCGH0666967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f776d04b4c9dda85debe233a73782e9d3573ab2feef001671c8c26df8cb503. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/USCGJ1880465.
The Clouds in Camarillo (Russian Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64963c8610129459b47bd3f0548a84a29ddfb413042dc2782731491afcd9e206. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/USCGJ1880477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x066abbd3993885717b46836565b5b0aea99fc4a94e74338cf6a150a844bd35a5. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TRA170900678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d51770e509e986de9eab023aa83a5ba14aaf41de5b653a790989cd8ef46e6d. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/TRA170900680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0d3db737603037c4e3aaf43de96ca477f2e37ccd00122f89303d43dc3e98d6. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/USCGH1136858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49379860eebd0900f584a9cded9df44eaa5bd146eb47d0cad9acb39e2690cdfb. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USCGH1136859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1bc290119272aafb957cfc71d2cf480c3b7dba06d3d0d4f694234be87bcb4f4. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/USCGH1136860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa829f54306f8f9d71d46a0f292f4f4f94aa50b0ab51f465c6f0240dfa319dab6. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USCGH1136862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ebd850706aa7464482505ffb07831df92169781c998392ba5d316030694155. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/USHM91366423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576790a98de92a5fde4f8a8a1600ef8bafb0413062cb9dee2d0caf87072de3a9. 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/USCGH1671848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b9a8f4685fd386b8d5c17a1449f93394a99d664c92e3531e3754e870afd44b. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/USCGH1671850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ce6929089b58b07a12c7caf19070a176c2ccc109403517a2bba4e56492070a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USCGH1671856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e379b0e63204adb440a5d2ed18d315135a4b4e2c95663a8aad94ae367b77e36. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USCGJ2062207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0144119084b07645e46dda9733b781e34cb63218af39cd05e90ad6481338d6. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/USCGJ2062208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb58167d631f3d9dac819562952bb4fb320c89aef7cd7f815dc55913694d56f4e. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/USL4Q2272072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa188ca5b5324bcac0faa4a8e31c774d41c96f481d1861fe4939ac4ad859b9900. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4Q2272071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c0205fa102a106bf543cdbaa217b0c27ef956153ba7ecef3c95dcc6689bd4d. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/USX9P2348871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f11f99137b0b79655bcb31051b6a77681f80f034da9ed24c948ac09968f641. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX9P2348872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421550e7fdca5856647801aced6d390fdfb95a5373cff44550a5e25c99041546. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/RUA741951005.