Algiers is the capital city of Algeria, located on the Mediterranean Sea in the north-central portion of the country. In 2025, an estimated 4.325 million people resided within the urban area. Algiers
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 0x32ea947a5c01d26942f7673d4206ae2bdc23d9608b7f9b32a46db5e105fc6c9e. 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/4f22f50a-9ca4-4ee9-ac94-e98f5a052504.json and https://artists.proofprofile.net/proofs/artist/4f22f50a-9ca4-4ee9-ac94-e98f5a052504.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 0xdd130422e1d7a8d713a7eeb841ac67488797eb73b2c5cd0483ebb5dccab3d8c4. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USMTD1505704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e0f523038a867cd23e3911ce52ece84dcc4cc1d69fd382a459f228be75e716. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USMTD1505707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80dba1a702babc6c6a8e2cf1688a574eef986f3f88418f64f78d8386c397ee9. 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/USMTD1709156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f0b8f63d30446452ed1269ad922f94f28ceeb29c28b0ef35ee8072b2f3e97fb. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/USMTD1709160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f0eb04f9686bab62f011d6fec53d76b3588cc83b9bbbc2b98f3189e4a8f716. 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/USMTD1709161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802899da77c9af3b69167585b04c8c753d8df3643b5ef775072924197888fbf4. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/USMTD1900091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x868910c3f464ffe1774739a81232633f17e03932f11ceeab7879d33ffaf7be4b. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USMTD1900092.
Irreversible Damage (Lil Obeah & Petru Birladeanu Transylvanian Dub)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b04678c7f8b11790498752ba8d587740c0f2602bc9a307f96c7ed851cc5db2. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USMTD2200083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x548252fb0bda026a23279cb9b1210bdb7da33a1e7cace9f9d3975dbef7de2122. 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/USMTD2200084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf9a8ef33289d1ee3b76d13bf003b461fb5e89fbe88792d912e90d7c7c25845. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/USMTD2200087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708d64efc1e1421155ffccd3ca26397f95defac864227ad99e8cf885013d65c2. 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/USMTD2200088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52360017b8cf01704ce80a09dd91eb8aed9fcde228ca28a8928586c019c800b3. 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/USMTD2200091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc58d09174e8352e0a02ac4a2ec9cb596d78c3084fdbce5b1a68ac48fc2ab32. 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/USMTD2200092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff6081e7330dff5a63bca86708620df2cd25d51fdb3231e6e99b8a5a11dda73c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USMTD2200095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe112e8d6d9230a473e2e1479e5851440187c3d906257f8c41c2fcdaf04152b3a. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USMTD2200096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b04678c7f8b11790498752ba8d587740c0f2602bc9a307f96c7ed851cc5db2. 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/USMTD2200083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x548252fb0bda026a23279cb9b1210bdb7da33a1e7cace9f9d3975dbef7de2122. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USMTD2200084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf9a8ef33289d1ee3b76d13bf003b461fb5e89fbe88792d912e90d7c7c25845. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USMTD2200087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708d64efc1e1421155ffccd3ca26397f95defac864227ad99e8cf885013d65c2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USMTD2200088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc58d09174e8352e0a02ac4a2ec9cb596d78c3084fdbce5b1a68ac48fc2ab32. 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/USMTD2200092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe112e8d6d9230a473e2e1479e5851440187c3d906257f8c41c2fcdaf04152b3a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USMTD2200096.