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 0x912b0e791d68fec720593af611fdc58b0b80cbf0f406207db48570f34b180ad0. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/91fcd93e-7098-4fe5-a2b4-993ebbb6647a.json and https://artists.proofprofile.net/proofs/artist/91fcd93e-7098-4fe5-a2b4-993ebbb6647a.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 0x6a6d2b3302c4bfda9e32512f1a0786ef2ae65926b64e4feaa51517bc716b6d2e. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/ARF041200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539ce85ab0778830ed0edc3820a3ba111665e971834a4cde4efb79ac53f0abe0. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ARF101800364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e2ced3c8faa1d68391051d863e30b8535a4e5bc60c0694d0d8cefb73db8069. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ARF101900409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e5a59ff66a699dec4a98e3fad8dcb1f5c76ab992f8a14338487bcf376dd3b2. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ARF102000200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f26e5d1d8cc0780fefe81ca1e50d78484c95340e9d89473ab5f014557530e8. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ARF102000243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b4817c42072bd4a60809c93a7ce608a7eafb5400b3679ab887ede28a10448a. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/ARF102000348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a553bb9a92697565ae9c38b32c0e701f62949dc08fa676b12b8d420ffc861f. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ARF102000351.
Tardes de Verano (feat. Nahuel Barbero & Acus) [Del Otro Lado Sessions]
Todo Lo Demás También (feat. Andrés Calamaro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5263da1582f80bbe9aa74aeeb04d36dbc07fc2bdfea33c6dbfe2b6bc9a928856. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ARF102300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f38d2e92335aad132f8ae3b948ed1a9f9a4c339d8a14f4915bb01e94a208e6. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/ARF102400071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb26630a398676df43ff5cf65f156e49c007a797dd2817aad479ff2adc2fe68e. 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/ARF841700059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3b53f73c2923266a2f6caae390dc7e1d89b5523f037b3c912ac7bc6efeb145. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ARF392121015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97474da35412dc179b2703aba72b046992633b0d01f20ed6821aa5929ed61126. 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/ARDL52100002.
Cuánto Tiempo Más Llevará (feat. Kevin Johansen & Rosario Ortega)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cdcee8f85470a405ffb6b5bcf53db1de0d41adbc294bc73b218fb4c1d6e27aa. 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/ARF102200245.
LOS OLVIDADOS entre ríos 20 años: inéditos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90afc1f266c0040e31aaf684a73bcef8e4234be808492c86e05c04199d98d7bc. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/ARHXW2002715.
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 0x179a23cf76f157937b25d92bb0430db65846ebca202e61e0ce446ac57b9ea417. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/ARHXW2002714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a98a6d86a0128b93478d82c16b95734dbc73e58e5ffa52b12b664fa22bf498f. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/AR6B51500110.