Alejandro Neciosup Acuña (born December 12, 1944), known professionally as Alex Acuña, is a Peruvian–American jazz drummer and percussionist. He has also worked as an educator at University of Califor
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 0x71d5ff3f0ccf1275d479e61c5c2213d7c0f7076977ca64aaea5deb9eeac54f7a. 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/2b3a6713-4e31-4aeb-9145-5d6825f0da0f.json and https://artists.proofprofile.net/proofs/artist/2b3a6713-4e31-4aeb-9145-5d6825f0da0f.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 0xc6a83d50fcf3a12553730d232dac96101a1f5f63110b8834acfa3f330a57a3a1. 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/ATP020901405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa58ee99b0beae785e728180862b922462f9fbaa9f328129dee6f5d1c19e5c789. 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/USLD91757069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a02e5025f94c8aaf5e33c30fe12f0d766849d95ec5d44b56f90715908a4135e. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/USLD91757068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9bcdcbe58f075086141c079e4403581a28203b7b45d99c875e668e96db74b8a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USLD91757071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f3f2750cd92d82e522b7e6e4a904ed3ef668c8888bddc11be4e72f077c49b5. 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/USLD91757074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac18525e2bfddabea851f350fcf4a89551d74c971db4cd3af00f5a62a7e8f60b. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/USLD91757073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72bced7b9dec254e529be68afc98ca19820e6b897ca646468a6cf7be59941583. 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/USLD91757075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e34802381ac1985b649d21f3b2278f42230960533822c42056ae77cfeefd49. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USLD91757077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca92b38dbb945d7ea9d7af62dce4a25e3c9cf759c3bc759b4e4f6b00f5db8150. 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/USLD91757067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ea941be8c25051c75ec2152b31c18a83895a928b01cd69a930fc2888d73666. 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/USLD91757070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa294b7bcc26467a38fb316421717bbb2837a18869d13a8c7a0b6296866a1eb2d. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/USLD91757072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9144c9f1cf36eb8bac81b204c79a250a248685a7babbf83263a088f516706f3. 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/USLD91757078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b6da384562b0fdf2032cd2dfb47a42612624d9cd032772cb218ca9249f122b. 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/FR6V82012183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe099fd40e832623414daad8ccbb50f5eaf86bab5501fc4aa19e8e1cb5ff0fb28. 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/USLD91757076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda44e08706a8b49d3d6b33238f3733f7ad04a3147b468528849b2d0f26498946. 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/FR6V82012186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d7e73cd5ff945c84112ef716df41a383b0ba8c4c0c3300d9a02249a75a269d. 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/USLD91754916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e9f67c05285e247eb2e730c54027063c378c9b5806132f35736c383ae2a328. 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/QMYHE1100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab34557dbcd34266947d0b719524972ebb922e833b9188b3a5ca462a82bfe78. 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/QM6MZ2232985.