Andrés Calamaro (August 22, 1961) is an Argentine musician, composer and Latin Grammy winner. He is considered one of the greatest and most influential rock artists in Spanish. He is also one of the m
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 0xc9ab7c33d3f7f66b82bc2f3554fb961c20ed1f6dda8a8241c6dc4054f9792e11. 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/9476a90f-0d1f-4412-ba05-0db71d2545ce.json and https://artists.proofprofile.net/proofs/artist/9476a90f-0d1f-4412-ba05-0db71d2545ce.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 0x84a7199cc68a5399b648d254e7e262cdb4995cceba7c9c22bd7afcc08b893361. 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/ES5010500521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b9e1d12231cd31b0c207c3cef9cae4770c1025c61dd7dfc4b7c22be81e37095. 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/ES5010400008.
Alfonsina y el mar + Zamba de mi esperanza
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf54cd08761be0261bf8b666ff48bcb3367503975a32a66e8a8109a43cd4ba2. 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/ES5010400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89dcc2357642f7c7fa5ceac299f60f41f0ed1b75605b4f3a9a80b99e3a3250f2. 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/ES5010600646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b314890515fad6b1ddf5816a6d61d55c10ba9aba60452d51768fba39443200. 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/ES5700200030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0413b1d54c1d38c5dbac89897448f39797e0a6b70f722eb39d28e6de54db176f. 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/ARA140500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x751b351ed2c9395927f37546a68d0d8b3d52709e7b2a2c0225ff415dffd981ab. 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/ES5022100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b037015243fd6fbcad592e61c9fb8e9a71d21f0bbc66ca2c414d5a68711ed08. 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/MXUM72006710.
Los Dúo - Colección Completa (Vol. 1 + Vol. 2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad64390197039b3c36138572f4a0091e4776ecb3fd16ee2935c66fdeb2e5e53. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/MXUM61500205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef76c4673d65ba27f1bd7fb285d3f706fc469b9ffdffe415d87a81dba209913d. 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/QM4TW1948287.
Las 100 mejores canciones del Rock español
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d9a37b744cafadea0333ea3dccba44dc294d8fd094fa2eba1fda35c19fea55. 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/ES5019753000.
Cinco Décadas de Rock Argentino: 1966 - 2016
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb750daa964f4c667e104d28e1bdcba42448163dbba00f400f6cbf5c997a394. 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/ARF109500364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6f7bc892086874885b1c1dd38131c4811146ddf0904cca1b7e3a80930bbe49. 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/ES5151301067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9067e9e9de4caaa16832c1934ea0d1ec39c5f1973b86d1220247d77bc6a1e68. 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/ARF109902276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6f7bc892086874885b1c1dd38131c4811146ddf0904cca1b7e3a80930bbe49. 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/ES5151301067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d9a37b744cafadea0333ea3dccba44dc294d8fd094fa2eba1fda35c19fea55. 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/ES5019753000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7f4735005c85c4c20f568a4b957b7a27b1fd252d7d97b9387be3df1efd8b42. 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/ES5150800155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6f7bc892086874885b1c1dd38131c4811146ddf0904cca1b7e3a80930bbe49. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/ES5151301067.