Alejandro Washington Alé, better known as Alberto Podestá (22 September 1924 – 9 December 2015), was an Argentine tango singer. Childhood and youth Born in the city of San Juan, his father died whe
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 0x98567beabc7aa4c3d3e4702811f5ca8443b0794040dffcd97f5f1767503b654e. 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/8ca464af-b0ca-4307-97e1-0cd9b2cd79dc.json and https://artists.proofprofile.net/proofs/artist/8ca464af-b0ca-4307-97e1-0cd9b2cd79dc.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 0xab2a0d2c081f6f7798d1294f654e4cdeaebfbd0d56510695792ca61398361462. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/ARG991005049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d438e49131f64c22471bd0be6e0088373f6ac6b7a14fc34b158c719fea7f8f. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QMBZ91359781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea5dd99c6d802ee849c8b6fce26bf3c982ce79639e2c75f52bdb6792f9aefa2. 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/QMBZ91359782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ffdc44b809d8a0aabec56cd5517075a513734b2291b5ff4edce17d719df0220. 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/QMBZ91359783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd07f93c9e602b2adf0108c16099dcf41a00a3d5495c06943f71d7aa99b1ff8f. 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/QMBZ91359784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bdb39a9b81adc34e81c46a69cee7306be530db6233e590562e2da4ca75e589f. 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/QMBZ91359791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb47896030659403a42caba570f7d0aaa51158ea2cc667142b47dfecb4e4144. 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/QMBZ91359795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94fc36d956e21b020dc95a2a74c3a02d6e751ebee4d98c1af8190ed1e97b5977. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USA561347360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c0da58abda71455c79df655c9c52abceeaef972c2fa0313728f63b39a11646. 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/USA561347361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f016339da1bef978fe3e22b1d0a5cacd5c6e63bc17634c0d0187ae42c6b2f62. 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/USA561347362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16332964974c21bad257ddc21e2d885c9595b878e97a10b5c09326b8e63812ba. 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/USA561347363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6408b1c4bded1163d79c648c67184ee49b2d216ea73a13928318479b0ebe12b. 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/USA561347366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f3bf95eee67d250ae3ef76e298ac6f7573950e43d07af468cfdfa1caefd9f8. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/FR10S2053034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77145968f4dacbab9e6eed8b68dda7ab3e95d84985be5feb7b0554f756f21ce. 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/ART340900213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf3beafc18005449649327402812e8be05fa5543fdc8f6aa67e3dadce1335485. 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/QM6P41541315.