Roberto Andrés "Palo" Pandolfo (November 22, 1964 – July 22, 2021) was an Argentine singer, musician, guitarist and producer of Argentine rock. In the 1980s, he was leader of the post-punk band Don Co
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 0x60e13c6454360629e403bc19ab072157bcfcf9df360565acc161d31b5c0c73a9. 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/9577981d-a70d-4e06-95ad-d51affa26a45.json and https://artists.proofprofile.net/proofs/artist/9577981d-a70d-4e06-95ad-d51affa26a45.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 0xa9b3d6d78221dea5105f615cae6e0945edd0a975952c07ea0aaba4c1eff4afc7. 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/ARC082100062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b534daa467546e2669c729f51f961ca26e3a4f4e20e0ca8534134543219ebc5. 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/ARC082000106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa303f2379941a2bbd086e2fc249f6a011c65cdf71c8b394536a4765c7122c3e0. 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/ARC082100063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1a5bd1830e1a836796290202c5266002243b1231de21b8ebcb5a643bc9fc62. 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/ARC082100065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeec04cf16bd28a7011f8e45e8b4e7a7687af13cdff5f99e73c574fd2ab6f087. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ARC082100066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab7e660f857ccce76d8028ca0c3aa31cdde4e7feff6a5f400986205525e40940. 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/ARC082100067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79121243dd229cf3316cf407aa9d90614343a9f2a8818f2370983deca3970fd8. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/ARC082100060.
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 0xcd44d6e541eff77d5586b95dbf8ab5f6193f19a80782f5b2d0184f0a1db8bfa1. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/ARC082100061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3faa99826e4afbd772cf91b0608407d7239d2560595a6e585ec838488187c4f7. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/ARC082100064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887980390feb3ac2fb59bc7e5c644dbce31f3f6585d993967595912caa8ad129. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:10:49Z), 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/ARC082100068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9203c87ca1573de75f295547d50e941f9eb386b1e654c43fce2c7756ee145240. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/ARC082100069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a42541d94f28382a6bf25838a15d6abdb586b36bd67b8690d1410e845cd527. 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/US6R21325830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f603e0bc6f33ccb959c4c9d84af13908f364081200ec687cc6436666e8ad911. 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/ARC082100006.
Cuerpo (Canciones a Partir de Mariano Ferreyra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e83416aefd09bf935790cee239e9a8aaab76d05df72b57121032c6f2247e7e. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/AR9PJ1200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9071c2e965a78ed0cdbcbff2c46bc5274cf5a5521a6b40c0cf1a6f9a7545ae9b. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), 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/ARD191900019.