Santiago de Cali (), or Cali, is the capital of the Valle del Cauca department, and the most populous city in southwest Colombia, with an estimated 2,280,522 residents in 2023. The city spans with o
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 0x1e8f4dacb8e7ed7b53c5a103aa34e34d4389292fa6bc30b6f00db93247cf336f. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/82d0536d-e73c-4dbc-8808-0de7ae624dce.json and https://artists.proofprofile.net/proofs/artist/82d0536d-e73c-4dbc-8808-0de7ae624dce.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 0xecee34a97e5f52cb9f9362729f1ffa158ec565caa768ed1ca40f8879a61ae0ed. 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/BRAR51900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe974728e318506a517f58fc498964d1e7bc196349a1d8b162c1ade707ddb43ac. 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/BRAR51900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc7da33c0cbb58954974082d08767f7da065641e55072df1bd83d6bbf88c7f9. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/BRAR51900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f78bd9167125a51746c08c53d85d8e7754c2358949bb7aeeb2fc50b07376a93. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/BRAR51900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6780d5f92a8016ec15cccf264bf7e6666a7a0825382005382a54190ada5d72. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/BRAR51900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a511d33baf650433eb7892f1b47f57ea91481bcdff6c17e5d86ba4d410abcbc. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/BRAR51900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc56b31fecfab73b23f24467ce8f4ac19e856238194191467fb2e9b4d2f34057. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/BRAR51900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d4ccf0492382188802cc80486398c1db2529dcdebbe10aa1597866e5a7a6238. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:24:13Z), 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/BRAR51900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc073e59cdb2c572dabdc9b31b4dce82029718f15b71ccfaba2c68f3baa2b110a. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:25:02Z), 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/BRAR52200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe07a4bfd5b4a446475c2a22ed6c122f9e3f0ca0f10c1c8abeda4b874eb1d1f93. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:07:34Z), 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/BRAR52200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f99a451a75eca33a5690ad6c18324092c36991e4cb8e5774aeecea23a281fd1. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/BRAR52200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc073e59cdb2c572dabdc9b31b4dce82029718f15b71ccfaba2c68f3baa2b110a. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/BRAR52200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedfe8b828839bcb8cf11d9ac3fe475a68045f5833d45a79468e02beb41add9a2. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/BRAR52200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90fbf75eba01ddf0124e4d5cc32564796271bbf7741d8100cd8bf790e2cd325. 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/BRAR52300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0698c75717d0dda62a21209d084e00c1c9e2b3b8f54dc0dea172a0e42ccfa04. Chain 2 (Bitcoin): anchored in block 958351 (2026-07-17T02:38:05Z), 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/BRAR52300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x027a43d3fb02369aafa9b93a456f9a65ccf5ccce030fb4cd63e1e595bcc5fd8b. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/BRAR52200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3239a7368f8c33ffea2ca2b49787802f4b830d4201b983d845ae64671b8fcc11. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/BRAR52300001.