Casero is a surname. Notable people with the surname include: Alfredo Casero (born 1962), Argentine musician, actor and comedian Ángel Casero (born 1972), Spanish road bicycle racer Belén Fernández
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 0x9132183ce97ec64679203cd8c3acdb93d3d7de5d90e5cc9e6ee08dc5a6fef78b. 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/01feb0ca-b5af-416f-9cfc-455081f1b338.json and https://artists.proofprofile.net/proofs/artist/01feb0ca-b5af-416f-9cfc-455081f1b338.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 0xebf6e63a37b6987ef176dea5bf47aaef7d6a5b79ee16c088971895ba16372d23. 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/USCGH2164785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a34b681d8f430dc128556d65f30a3b21c6dcc53767e463212cc8cb35fb1328. 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/USHM82151757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf33a73b6ebf6744b6b4c42268d1dd8434fe27b350023553da8aaa94d76322c. 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/USHM82155508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25997eb7841343908047319a36d80f031fc40deb6987861a883eb560af5d2bc0. 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/USHM82155496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d72b04ec3cccabc6ecb6e1720e186e2732260ece94806cc3ef48aff95bf1ec. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/USHM82155501.
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 0x27351589c20212ef0048770091c4e5de969db1e3fd9a932fd89d675df33d77b1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USHM22097039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c89f08c2f51a151e0ae82d5971c85c443a2e808037b56af7e405d4056a4c3b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZES72326917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeeeb03c7727204d38caa2e7d50f083b5283a7b587ce1460156a0502f5070166. 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/QZES72326904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb681b0ed8c48eb478b2a0d7f78e2cca0eb946cf560fd06e9c02414d9b632ac33. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZES72326919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa01f7220c8c3fd80e978732455e79907bd8d88805e8211b175c9257b8ae368cf. 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/QZES72203667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c67a9769eb614895e94cd2c390005e7d39c30653ed08185c97df6c0ae32fdb5. 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/QZHNC2290787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d4ae4560b9fe4bfd41b5efdca76b615c3d7be77ecd5c0ac6f3fcd82aa8acbd. 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/QZHNC2290796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7daa2be954a25bdf59a5e69b2eee7903deb8746016c8585ddcd10470be4ea576. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHNC2290802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b461483e4e1812d8fc0d269a9b7f90e01ea2b89a47c08290c40681d48aecf9. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QZHNC2290790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec2b3529f3af2676872361ad4d93a3fed178e50b4157492d22cf7a3c4a85281. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QZHNC2290798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0750a541d7e0b714b53c761aa6fc1e5546584caeadb59ced8c78b6fe9f4e04ca. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZHNC2290799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d657b768762be54c9dddf60799ef15cc823d7e59d5e8cb968fcab2592f4c62. 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/QZHN42560285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd894c8721ca2db4cfcba3e8d04929343fec0c102748be5d0eb34c309ca01c6e8. 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/QZHN42560287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6fd6054b749d74f0c99c0fd6cd0c574ec0caa1b42fcc5fa8dff5ac469b26fc. 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/QZFYY2510766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6abc056389b14ec8e2d607c8b6d4a4e1c8c98aa28720ecb47ec372d6a61902c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHN42560289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76bfebd6fbdb5c1b483b14fd2c5aec0d4110105a1865975545fbb91aa9e3ba4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHN42560290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe248649c52bebbcc92c90fd6fb19baac70d35b5cee180ca985e4e900ce7b76. 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/QT3F42419090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb69117de7a15b0b74e6915f231094acdccd3ee2dbbf4764c649a004e417812e. 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/QZHN42560292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8495aa034100dbda86eee1d2476f7daea5e6aa2294cd8f0c7d14a671b7abd4e6. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZHN42560288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa329b08f646fff81f24597367f47ad64b905a98d095c08f4ee0d3dc3b899c7. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZHN42560293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd72907193cc8f0408ad030750e0de18e85d35f36dc5ebd3b25b2398d9b06e05c. 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/QZDA82312460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3f4a86e3df7d070a86980a49eb4beaadc9496986dddd431240b05f39c97732. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QZTAS2470784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89095230112be8947d4a7e06cd247e9ba337bde3b47f37ffd610c98c6bb75dde. 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/SE6I32462867.