Antonio Castillo or Tony Castillo may refer to: Creative arts personalities Antonio del Castillo y Saavedra (1616–1668), Spanish Baroque painter, sculptor, and poet Antonio Castillo Lastrucci (1882–1
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 0x0fdb75f8e17208379bb126d56d1716ef9cceaa6a166e227efdd8f0b90b624167. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/047f1bef-df93-414e-9afc-0ff0dc62c2b6.json and https://artists.proofprofile.net/proofs/artist/047f1bef-df93-414e-9afc-0ff0dc62c2b6.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 0xd10338200bc186e6e0d6b32969743ab2a55e076603b267c3a0230d4a45ffe96d. 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/QZNJW2326316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ce7f770452535c194d3f22d3ab5b19214317a74e8b75a44284a68d3a3710e4. 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/COFC18505601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf054372fff87b3f362708a9b5185fde7d50dda35a32bb6b92c981b60fa6186ed. 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/COFC18505602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a3a2bb25f0bc3bf248131d1fc87007dd74f2c2f2de3f108513e4afc1c49ce4. 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/COFC18505603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3004e2463ac9c8b0c2f49dd230f50cd11e5f89ae2c7d6c35aee8626756bb2b. 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/COFC18505605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487fd3c59f3c8ae7244f5804ee3a577696cc90ec355d69064f632e8883fe3eea. 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/COFC18505608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bedd06bf59805b82cde551b065c8caec88a6fc5c019c65a4fe893dd4306b0c2. 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/COFC18505609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a4521bdc9931c6ff663b3bbf04ed3879115c4711d5f888b1f93511ca9166ef. 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/COFC18505614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80fa76cda7d6529aefde35970dcd6a6772c0852e56a3b0b57000bd4b643bdeb9. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/COFC18505616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f07b55190e12b3832ec6c1117b00a5fb923a8fb13e61f06ba4aea6b360bf08. 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/COFC18505607.
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 0x724250e69e0abbd9f4b94ce3f14509ed9fcc1ac321166c063d98e95f50407f21. 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/ES49G1400606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a31694389a5f7d61e6bbc77858576761f0d7a897f496f4a282ac304ce8edf53. 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/ES49G1400614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418dceb181980243e957fc5e29591dde560612a2e80ab47320c3e05f766286f5. 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/ES49G1400615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c0557df15029919883fd84bc531de87914ff4b5250ac8dde89a41455df1c7c. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/ES49G1400603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x900e7c7426aa3ec7ccb04db884bc774198acc9789c0978f4a9706c3d9506b3f9. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/ES49G1400617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff16aa5f67b135b09ca1277fcb3a7185657bbbecf71316c6c3a0e4ce23b50da. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/ES49G1400620.
Contrapunteos Con Jerarcas del Llano Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd325594e5ffaeb726ef32675714a690c067ae482f93f305b4b2ae5ce5216eeaf. 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/QZNJW2497325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24735cc3a977ce66d87c5ea6c92e0989f84a24195c99c325bcde93b34df34276. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZNJW2497317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x435089d203377ff6d5641c8283cd189f7bee85e4f9fbfbb634874ffb2e21cfcf. 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/COFC18102410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb816d59637834006a1d7e78dc5283cb4214649a98cef2b332e6a59f4d9ef8d. 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/QM4TW1508407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9300e1594932c379caa1ce89cacca7a317ddbd8c67cafc7e52f3753ad5521823. 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/COFC19500102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d9e4bc0d37ba6f042086ee51cfada1f353ad6b2ecfc818afa0a2d56199cfc1d. 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/COFC19500108.