Luciano Pozo González (January 7, 1915 – December 2, 1948), known professionally as Chano Pozo, was a Cuban jazz percussionist, singer, dancer, and composer. Despite only living to the age of 33, he p
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 0xbdfdef33aa7a2f687b057cc505f7840cb4fc682af856e61fe900a70885553d57. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/13c961fc-3b61-4507-bb7a-82c8baba6cb1.json and https://artists.proofprofile.net/proofs/artist/13c961fc-3b61-4507-bb7a-82c8baba6cb1.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 0xc8f5e8b63c151fef79ba4ef7bdb7e023435747c33f478c9e430dfd8c30f934b2. 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/ES28A1010252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b7f157841fcd80bda76a61fb83f1ad199e6e6f4049070acc69a422d32f4295. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ES28A1010253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x104a263a2715491effad0b9079496cd192797293b183672907c85859a5880506. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ES28A1010255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02019d8e6dfb61d79e6992ad03993078812853be78e5a67d85e6346138cf92bc. 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/ES28A1010262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe141ec99478e779816be569f7f6ecdc6d8e2cede3745bb9db352cf77d1935265. 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/ES28A1010266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0062d01c099d0df13a90024dc6eb8ff71c456749d3d529cdce8f09d2f79a8615. 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/ES28A1010267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d023521bc87eb3502e08de27d14ee98ef08c421e404e0fe5615e6ae7185719. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/ES28A1010268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ea1273e857ee8b17a76026e21fa083fc1c212e3fb9d728d57bea6637d6519f. 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/ES28A1010269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa7bfc87462163ddda8b86a20c5e9834e4364e0eb8d75fb95c02da929c8a8873. 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/ES28A1010271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c1c25ac62a96a7e34c6a16a6ebf4c6a87cc508e72961fd5ae25629bfd356ea. 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/ES7710901701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a02a3062959e824ae2ec8f59c82121ae4fc848501fff752bda50f26d1370dea. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/ES7710901702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55e844a69759f29f35a73dcdd428252962e67ac5e58ce72aeab5141674fa972. 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/ES7710901703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed11ab04f8e3b4aab8e859424ab8d0631fa1d31f6b9e4776edcc0819e2ddb39f. 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/ES7710901704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6cd167927ea80af6fddbfd3b123f83dca062ab94cba219154e3e1e72ae77992. 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/ES7710901705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fcb1ef68e35ea1c81cf0ba61bcfc7ab866856a24a9304323a04f7cb5b71d562. 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/ES7710901706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d426e7fcd6060a18fd644782cd510857afe56061ebcda6c0ccb238aef1e2f2a. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/ES7710901707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785bea31e6344ab940ab582a7cc7b7c8fb9366bdfc43577900a45d1fa27cab5d. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/ES7710901708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eef538a10bcc557c985f7ab5c58d00989b90fc8f9f42e4c4993b88040c42621. 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/ES7710901709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa52c5d87390b415be7a8b1c650c4340a3cf4e14d9cd8f432cbce91a3fa86fcf8. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/ES7710901710.