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 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 0xb47e56c50dc2b31fa7737decb62aed18b46f2eb80248ee35169a698fd4022c7b. 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/d1e13d5f-c4a0-4b9b-969b-47f75b808b3a.json and https://artists.proofprofile.net/proofs/artist/d1e13d5f-c4a0-4b9b-969b-47f75b808b3a.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 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 0xe5a01251e8a5aaaed041e6507e2fbbe7e66caf99b9a200439f9cce3662dd4d2e. 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/SE62M2370970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364f437cf8aa1dc4b28851875b0ca555a1b01a1c6b767a41b3cd98fbe994fcc3. 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/SE6A92374874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcec8b0aa99b331b70c86652c20b16ca6ffa56ce95d87402dcee77d692f641282. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/SE62M2326797.
MAQUINANDO MALDAD (2023 Remastered Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4842b26aa9d99ec70befda13e0bf7810de23675353e57c696b71c10b223e8c78. 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/SE6QE2394136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe901e2843a966bdabcbbbe9d727fee1dc66cb56afd68a871c41d116a1ad1a054. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/SE6XW2306772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb60af84f58890f5487369a940d4b9929b7b6787c811e294f79b33526e569b336. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/SE6QE2340744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f1334fcfcbd6a4d9d34017edf3f7696420dd6e2c514895a5adba99d1dbc134. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZHNC2325068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b284be395dc2a8229536fb8d5731ecc70941795e3834075df1a44f9995ea420. 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/SE6I32377320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67447660f38e2b911b13085df62e5f6ad7af2886c173c9752f227ce8db04e326. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/ES71G2313102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc3f396b9f7a59341730fa8fbfd483e678dd9225e28053339114545695bcc39. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/SE5752381366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bbac0456592e150d78e9dbc2eb40516cd4d1cb70e65fbf1bf2bb230df29334f. 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/SE5BU2368142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2428cc5334285e28fce35d360603da4785d10b89dd404b76d38cd089e8ff2e58. 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/SE5BU2351352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841375b9b037faafbfb8d0ca87202188b07f54bcf27df637693e66f5abb824d8. 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/ESA092303681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98aa8390b512f6ee3940cdcea7a276e21b771efa9f45797c4174dbea12d4595f. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/SE62M2299741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63fd59c3c3a43be7645c057990f689d8289bcb427b2483e43f86c8864cb65d9. 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/QZTB82295047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eeb34382aab5f1d67f5df6223172642d1989eb94a719be4e69b9ac3eb7ecec1. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZDFP2037085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb91bd46d85830447b0ec1dc5d87fe355841b500fc5c7cacd72ad00221fd49ec9. 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/QZDFP2036262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb3976fdd9be708f5b2ade864914720ed7907ff56d21a9d90918ed21dc688169. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZDFP2035266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d8a431fe8034851e8d4c9e88595f53246c667a751622754b572220f18dad9cc. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZDFP2029434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c0b0e046d451317340be7a3acf295bd4b7def79c700eb545b52adc6d410184. 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/QZDFP2029079.