Alexis Puentes (born 1974), better known by his stage name Alex Cuba, is a Cuban-Canadian singer-songwriter who sings in Spanish and English. He has won three Juno Awards in his career, with two wins
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 0xaca18b587b7d207cffd031381c06a33a65513d44f0429a9ed9341113cf39d4c8. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be40135f-6d57-494f-a2cb-6b82253491d6.json and https://artists.proofprofile.net/proofs/artist/be40135f-6d57-494f-a2cb-6b82253491d6.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 0x6edc4b1fb7fbf6816f62a2377c459f78a05587a5b7d0f965285a5d0d2751867a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CAPF62100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16bc17ecb6bdff5bc409935ed6c8815b41d68b7bf8c24216a6c9a1fe17659c0d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CAPF62100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6127467f6dbf8fdb8a4a719c2720a3ea120591a7801c182c762487e9b2b1bc4c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CAPF62100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2399182cc34a939d6ce3ae7f38b84be777d6cb900304fc5d4e6fe445f428903. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CAPF61900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb8bc6dbd33ad8838a5627bacf2d183c71d4fc3461d078e8d0f2ba0f9dedc0f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CAPF61900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7cbcf7b0c09f8e6d08e5b0ddd36ca012f995ff1e8d73f6c3fac1ab87ae2d1d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CAPF61900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a351ef18e7b660eb504257c4dc2a56558f82b8565ab764032f65a73a1c895e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CAPF61900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494068a34c79fd6741a907bb9bf002c26bcb13145e2c4a43125d512493a0b3c6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CAPF61900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a048f014260a7628a1111595f63a4bd6792e654e62d64e16b1d4a6fdca4984c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CAPF61900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c0f7109d2e3b9fd25db77e40dba02990e32bc41410e931aa56c979cb9c8715. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CAPF61900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x964a9bf077d68189798f7bbbd91b8ecdf9ff10ec88603092e3039a3aab3056cf. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CAPF61900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ecb9b1e8889f5e1020714d3728ba19aa34ea93e553b82a05bcdaa01e702181e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CAPF61700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24642499864e5ef2ec801a2ac1bc9181cd8c06dc6d96ad504f872e58a545a3f8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CAPF61700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa0eb78cae2eaf0b62d79302486c4187306c89701dde726c3723c4ea1c81821. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CAPF61700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0809f0e7ab712fbcdcb4168fca171b9e3b7c663c3cca4edc32013e6c256818bb. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CAPF61700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7051f7fc396b155672e089e26ab6656071d912cbcf65f697942af6a9fa28cfce. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CAPF61700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4af57375bde8fc24b5c71dce9972f445bbbcfc31134d21545b3fdd794f6693. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CAPF61500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f0ed388ac97fca6a0fe92eab95d885584d4209da64e9555528867616e35112. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CAPF61500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ec46fc493f96f5191eeb2236a0468853c3f58a4ee4af6ec75b98643b63e180. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CAPF60900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5ae1c144d9f4bb095e82796bccc8d156312f4bf2d1db917cb099afe7bdc2be. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CAPF60600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2a5c70dfd963e33a09fc7cf4b25a8430fa03541320675127bbbff6d9949efb. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CAPF60600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba35a5328119213a20428d2cec0aac6b9702dff9e0da48f3059a809fe98f2bc9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CAPF60600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06fd0ae453123cd8caa8818591b8057f8d61e883447e19b16a80640f53237af2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CAPF60600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed2174926b811e46d65d89bfcabcd462a2252bf9ad644eef33f58830c47e1fb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CAPF60600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0d5c3d8db2fdf85cac66510a2ef8a4d17abaebedc356a150a5aefb2b5a9283. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CAPF60600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd80e2343dd3268cb87de61b169620c448c04c31944f0f212ed69da53e52220. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM4TW2218978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e27e228b83d673083b7eda5746a9d69c28e9f10868782694dd22058c39938c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CLLL22100680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6edc4b1fb7fbf6816f62a2377c459f78a05587a5b7d0f965285a5d0d2751867a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CAPF62100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce62bce8c5599c64f266e350d766e05b3920751487f1e35635a37930bd2d7275. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHZ32057136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a351ef18e7b660eb504257c4dc2a56558f82b8565ab764032f65a73a1c895e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CAPF61900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x964a9bf077d68189798f7bbbd91b8ecdf9ff10ec88603092e3039a3aab3056cf. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CAPF61900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7599434fd51ef72db3c64feb85cc177ca996a9fa7428bcf419e97b306c1ffdd. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZGLS1927221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e483c75d16d0bb43e118f9f79dd44d4e3557bca260bb80d70ad3ae247d5d2b4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US7VG1972180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c194b4bae5082360f16d1dd1bf9863670a81f64c61198466872dad6bba4c84. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CAPF62500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62492e26a0c0e495577cc015901b7f2ee9f4b65f1eafaa7f0dcfd9f72818541c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/MX2682000043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4143d613b5f5b9bd0d6d42a2716cb74b4258a80d6e42eecaef486d575f7ea6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USUM70975588.