Mauricio Cardozo Ocampo (May 14, 1907 – May 5, 1982) was a Paraguayan composer and singer. He was the main reference of the so-called "golden generation" of the Paraguayan popular music and a strict s
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 0x7fc174a867a87118165c2fe7f1ea786dce4e368195b89a88731dcd733b93296d. Chain 2 (Bitcoin): anchored in block 953923 (2026-06-16T09:51:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1c637528-4857-4bb0-acb4-d5599efcfbc6.json and https://artists.proofprofile.net/proofs/artist/1c637528-4857-4bb0-acb4-d5599efcfbc6.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 0xb9a069bc0415d84980c473f858d3bdc281549b540faa5c8ab787cdb8c573aaa8. 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/DEL112100562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7387ba052cb6aeebd5238c0d8e154195e2e475eb66bfff9758171473ab0c0f1c. 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/CA5KR1810561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19fe9f805a13b5dd4b49249b13dbd20b34691132d00bc234d6afd538082db46e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CA5KR1810547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6354c1e97072aae4ddb31faf2809a7e8963f923f3bdf1aff9a2b62bb6e686c2b. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/CA5KR1810564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55de1c48bc892464db04b9121bb7f79d6e8b73c805a2481e3f53acc127854063. 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/CA5KR1810549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd289a7e0ee78c48377e1cbf1469dbecc004b2dd1096f907939a9086666c4d55. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/CA5KR1810553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0bb97cb156dc6ecb81905815627574bb331a29a3b473ca589366ede72e04b3a. 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/CA5KR1810554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd87c100fc8dd612f97952c788d2fb6d0a2b18519fb78d7b1d1ec30c5a4c0872. 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/CA5KR1810565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5752fa8b7d92771cae9901f97a79fbc0b1d8b1dc6aac606d0345a889d2e69d5f. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/CA5KR1810555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383d57738c9b26e6ffe6e7e1853c0474366caf79ba07c43d225089ea611c8303. 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/CA5KR1810559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa6d7a9098e9b7f6d3373db3e4da668e1a9fe16b9d39dab72fb3fea6e47e54e. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/CA5KR1810543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4dd564eceff9ad8aa38289bcca6354efcf8f8d04f2672e3b31c6fae2c2b777. 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/CA5KR1810556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa470a91bfeef8a2ff0d52eb746bd4f632f711af39dadb8c094a21710bf6f9c45. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/CA5KR1810557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f65f37edd6d5d580fea7ac23f91cca5d128cab2edaa7dc0f8088730b84f6b4e. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/CA5KR1810544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b9b04cec2c3272131302d4ecb8801247a87d930a78a4c44945d73cd9ef2304. 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/CA5KR1810550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb039c3f2885257bf2cde3b3e1d9e5fac438e3a4c7b44dd4d033fc55c844456d1. 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/CA5KR1810558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d84e75ef2a19be8444410314019cb1d8782fb46a240c4d43590ec094fc19378. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/CA5KR1810551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3feff218c13105722eb0d0c55480dc78542cb1e4dfcfc2460b981030b93959be. 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/CA5KR1810563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa70c2c6dc85bf22ed3988ad494909f7ac618d8e7196b3bf69a36b9662041cb10. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CA5KR1810552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7011d581733b12fb6cac74226c00a2713375a739986715c364e540f5d20eaa. 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/CA5KR1810545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c83b210df8b90db55b88f60753830f4e1822cd6f21095dc440056895ca0bfde. 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/CA5KR1810546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x022bbfa0711991bc92bbf396eb78639ccf811aa47af9b8e0267f5d92424d32bf. 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/CA5KR1810548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b5b32085f4a5fe5d86396d8c794424e0edd3e3eef60b208a1f2a9f8868317b. 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/USCGH2025089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67df5a14314de630e77732292a8e517f81dbc230d99ed597a1ba69eb1ab3a6de. 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/USCGH2025090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ab6be2617cb73bfc556f1248af2931fc334e1462acd5870b8a3d378cca41f2. 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/USCGH2025091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2dac621f3ef5885bf2dd81ee9c5620c5cb9c92b730dbcffc0399adde6f989e7. 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/USCGH2025092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2672a86fbfeb97793627180cccf285c374dc309d2bbc7e171359718b88a30e74. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/USCGH2025093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42ca1f17eb3075cfba275db88808abcd47684d3474a47ae67b44fcf243205e6. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USCGH2025094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6feec034a349443ecfdb707a687284438650aa4896c4d5337034a88389d50344. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USCGH2025095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567251c2242cb35ba88b00dd94b0119396b7cbc5e6c8f202e7f0ac4794beeda8. 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/USCGH2025096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a0f7d998069e82f7529e6a824a2a1065fbd200dd69af4c616be24d75e50ea9. 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/USCGH2025097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea2adc394d85c3682b32d57c37513374d9678f9d3409ff631c442dea8670da6. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USCGH2025098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab5819003bf49b501868c5c03f289a04de36c70403754a86bcdb276af05ea5c. 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/USCGH2025099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f7c2a10df3ae2a8b5ead2dc5241a19265dc8f87efe4058abcaebf8d8989fbf. 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/USCGH2025100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585b2893ef4e0e74bb643ec8397b418e3849bdb7dcf4bd80c8ee7c7611b428e6. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USCGH2025101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa854f1cfd9cbc98e51780af5e6a6b6b504b27967855399ec5ff375ff51d295ed. 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/USCGH2025103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d3a7217af0d61e6a3184f47b98f718a506b8c4285fd6e151a2266fa9ebc7878. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/PYA051700356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695f0ea9d2e265189de449ae8e8ee85dcf7db2b81886bf939ed0153b57037c9b. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/PYA051700361.
La Música Paraguaya y el Quinteto de vientos Euterpe