Los Gatos Salvajes, from Rosario, Santa Fe in Argentina, were a beat and garage rock band active in the early to mid-1960s, following which members Litto Nebbia and Ciro Fogliatta would go on to form
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 0x94b0357a3e73618c8836f9a4022edb83ab2e9837b15045b2324eec56b3231a10. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d2cba23e-a372-411e-9b19-f0c446f30d57.json and https://artists.proofprofile.net/proofs/artist/d2cba23e-a372-411e-9b19-f0c446f30d57.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 0xa3cbb21bd87d09971fc41fb175a31b842b9472f392c3b0b635193cd7317b0e6f. 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/QMFMF1582278.
Una Celebración del Rock Argentino Vol. 6 (Sui Generis / León Gieco / Charly García)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc47029fc074aab96b6e5e37f45584405f4d2baacfc37c682bbf08486767198e. 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/QMFME1523306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89fa92bce95d6c2c32f6fad56c0e494cb3e8d5216268913129dfc897adf4745a. 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/QMFME1523308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98379795c4f1dccd0c485300dc03f7b320aad34e16de595be73511035e04877. 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/QMFME1523310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93080e8461d2e8c8603a5e129806e36be49e799f53e3fdf87e458a971044b88b. 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/QMFME1523314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee89a248626cfad2cec014900919505cd72a1a9c7bfe4de59f4f4e3dbfed9f1. 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/QMFME1523315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x613f7de4cde611341953842491c0e4bc36bfcb3f1a1425554cad0a92d759874f. 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/QMFME1523323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f6563893e3493feede009306659f9ce84244da497eb1bfc3b47b0ccd979193. 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/QMFME1523327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9f7e2c1ea3702476294a90e5b2021df0cb01758aed1fcf06e273f2984f6d42. 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/QMFME1523329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2e4a96af9630ace0f8348a60559c5be6707b6fcbc890f13d6b0c79a3def148. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QMFME1523330.
Electro Harmonix Presents Más Rock and Roll Vol. One
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad2803fd51fb46cc6cad098e7851e32a593268b00c679c31e03862ce08b13a5b. 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/QMFMG1310791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2931400ab02062e45976f8929a67ea477aaf8d2daf78f4a25b9b26ade8374c. 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/QMFMG1310795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f02abed2747ccc16b3b272be2a33f5af2ea2ce7d56e65afdd2a50d6d558e473. 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/QMFMG1310797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a9470f338db38e8f364b57763b50c12d4f76074036f7881e8f8add89c4f8ad. 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/QMFMG1310799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf918fc7efd121a2c3f2c0ffe16f4c64b6bf12c8e98ee9a4747c604e461126304. 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/QMFMG1310800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe81782c15af10c54d8423e90322aebd46c50fb422d983ba510418a37339165d2. 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/QMFMG1310801.
Una Celebración del Rock Argentino Vol. 2 (Almendra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa558bad5373a694e1eba52791f920ab815dec8a607871e5d117f0d8381caa0c. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QMFME1522591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef436e08c89743fb00aa008f312128cc136d3973a224438a21ebbf8115829143. 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/QMFME1522598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27335e3a77bf43cc7edddb753ef0089044f92bee8af8cb6f1dfc0b88a650c852. 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/QM6MZ1483280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcadee64bb1b92010c222c1d9595f1d4662d1ea7651233ba29c6b79834a82ece2. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QM6MZ1483281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84498a35ebf42760c26c98fec7aed8a3ef2669dbdb93103494d6d360568b40f0. 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/QM6MZ1483282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff44963fb3328fe80cf1fbc91e2cc3cb3dd35c696055abf3374cab85cb6283f4. 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/QM6MZ1483294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd60f883975d735b675ef6a02126e52cb8e546df76bf962b4bad424239b776a. 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/QM6MZ1483285.
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
La Música Beat de los 60 en Usa (Desde Argentina)