Roberto Antonio Rojas Saavedra (born 8 August 1957), nicknamed El Cóndor, is a retired Chilean football goalkeeper. In 1989, he was found to have deliberately injured himself during a World Cup qualif
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 0x7d1ea28c39db6eff346d7a090ed0a159465a8d26e47d932244a5dfa644ea1694. 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/48433c3c-9554-4fd9-9e6f-770d55c8c732.json and https://artists.proofprofile.net/proofs/artist/48433c3c-9554-4fd9-9e6f-770d55c8c732.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 0xe2a0e6461eb8f8d7e700cb8453af3bfaa3f0e22e40a4f14684aae3cfaccb8c6c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/MXF366006362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed85fe84cdd397a885e24a7e6c35d8d82379ba3bcecc5dcbddc2854c4fb606ef. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-19T23:43:02Z), 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/MXF366006364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8e9212e814af00b6e7c1d59aa09887bf98495d92e2bbf2ba2aaf748f53ebc3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/MXF366006534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00598c5c701594143a1b8740f20b338a01632d3b39796059344fd5aefc25b60f. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:54:13Z), 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/MXF366006367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf466d69150b6800e7e91a3ebc9947eeefbab17fa6dfab5d1f1182dfd582c8d81. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/MXF366309259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8944b424afc634603b69ed1500043e74e60762ad545a4604cac16f68799eee94. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/MXF366309244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d08aeab71d3d9d0a756178d02ef8954696495c3c3e7420c930817498d3af99e. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:34:19Z), 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/MXF366309247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac8e68dd0d5b860cce5ed7962101887efe728054978ae01b5f3c7c611b96d6f9. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/MXF366309245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5b0fd9b176fd111b2cc91ed9749b0573f5636750c08aec4aa98b6f19de004a. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/MXF366309246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678dee32e674e61678f959cbfbdd11905a80d8ce93211d8cfc8af59465175241. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/MXF366309250.