Ouenza () is a town in Tébessa Province, in far eastern Algeria; near the border with Tunisia; 43 km south of Souk Ahras, and west of M'Daourouch. Demographics The population is 52,000. Ethnologicall
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 0x48ecd0a6266af8fd4af0e98c009927b61c9c31d07dd6764b996a7cb7eeef6944. 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/225f50df-9347-4caf-a87d-1818092bcc9c.json and https://artists.proofprofile.net/proofs/artist/225f50df-9347-4caf-a87d-1818092bcc9c.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 0xda6294bdefbf441d8f8a6923f1c7f8068d88cf6e697e8e46f1bace607dea0225. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/CAHQJ1830082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d10eb8002c83edcb51db739f67f6e303be1e80f0ec1d9bd05a6e328b6e7d487. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/CAENV1856403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a1fad87ead7ff0edc47e886739efa1dee670ffab2303479a951020bc2bfc44d. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/FRX201915739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb661559a56935251bc88e6e8f0ba68bd5a839c82fee24f9204cc1801114cf5b1. 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/QZMEM2084361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c48bf363f7fc40343c3c0211a820b1f34ff8bd6e7100b3ae7c04e54759bf53. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/FR96X2061512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b330b3483f599ff6cee6aa88af1c6943a21aeeb2548e43835e150030e30534e. 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/QZFZ42276636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x992e1880d7ffa1c6c974130820dd545960ca50c8c2cd0dc2a0eb3c3db8e76176. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/QZFZ52102830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd16b8231427be140a848d80925e38915bdb5430d48b212b9a4cadf1e72a0c5. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZMEQ2110248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e7dd2a3db50254fb060d2151200311b8fde9e3797bfa34ae12191f47b80ad2. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/QZES82192016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb727554e43be67c45b37a597771e002406c0af8ac147aceeae256e4858eed718. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/AEA142301004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f927008c3e3cef111b08f5fdd7ba0899dd2670ca58a76199fc6431164ea907. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRIDO2311954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb727554e43be67c45b37a597771e002406c0af8ac147aceeae256e4858eed718. 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/AEA142301004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b6269fbfedf316d693a72ea70f61ee6c303dd1b9341e0743c351899fd5430d. 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/AEA142301178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11465f1aa7423a5bf5d608ec12969a81844b057ccb7a3c24371a258ffdf09e9c. 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/AEA142301180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b898fb9111f34700b5f9c227138b85625e0ce2cf39d07fb4394b14e8d44931. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/AEA142301181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86652f82f475670d2834a6e71504b71cdc5698f70872f88d746db91877a5407. 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/AEA142402143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23490ab9ecd65115b578869cc11dbe11c91b930aa4397efd432d04cc5396539b. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/AEA142402866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71582daa32c77b29b33516aa48de1e006a8e2a55513cf73671385b0dbeee5b7. 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/AEA142402860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935be49e2077da7442acffbeac9ac64113babce959c937455f4e0f984535bb96. 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/AEA142402865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f4630f6c272d4867612b81ab1c0e4e281193aaa450a60eb9231a4120890841. 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/AEA142402862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689c7d6ab40236baaa157a68da3d223b46e6fd58a31afa7d68414845108d1dc1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTAW2342245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a04150a298ab4aca69c09d9b1ade30e8510713d532801cb3f4343d762bed84. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/FR9O62000170.