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 0x86687293f2df01149308e20999a713bf205162f38cddd441d7c38838a0cc89ca. 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/4a828cfa-d9d5-43b1-beb7-c22b4ed1b168.json and https://artists.proofprofile.net/proofs/artist/4a828cfa-d9d5-43b1-beb7-c22b4ed1b168.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 0x23d13a6abe3dd10b8182beeff632ce539375fcfcb7ab13f99ba27ce3d3802f92. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/COF018200536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b35cdf9d76ac2b123a519cc8a63847fe750e91f994565325b1dad7baf4d239. 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/COF017900269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60b8f3b47ee33a401be084c573c11eff0a1d5fb99132bcd9c8f10a4d9aa6280. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZ5AB1780489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5d8028ae5cea87979eb0353ac7d73a3761826a972e4cddb79288810c9df07c. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/QZ5AB1780490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x677ec9ca51b7477ed25ebb386c2a8abba822c0dbd895e7de3f092622258879ed. 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/QZ5AB1780494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66ba6e232b977470b57a1c185a7f4bf18a3c93cc28ac8174424a63c2bba8281. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZ5AB1780496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48854fd30ae9ce6db785ed14e853f7198e95cd28eefdebb324b8179a8e72b3fc. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/QZ5AB1780497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44acbce155dac7daecd3a0ad76de6554fa73dff99474da593f411ccce8ee25a4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZ5AB1780499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17700f5ebb1ce10d04aa0fdfc51a837991d8132b80a366252f632e345fad8116. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZ5AB1780511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf379f34d794728b2cb6dc9886bdda0e9c85bbd46110e7895648a96e3a56f479. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZ5AB1780521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab386e6946620a9bf9c344257d10a6d6ea846c3b6fcedbdd297cc67dafb61f2. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/QZ5AB1780522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe29bbdf6e3f65906c5cfb4db201638e2cc4e216779f4b648759dafa9e1630de. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZ5AB1780524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf198189c1f407564b35597e908570cf2ad93549fd361c6b1cdaee4a78d2643b7. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZ5AB1765810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f607aa2784e05a1034f22b9edf499bb6e3e0c57be20e0e3ca97b5c3be3be71. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZ5AB1765812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa63db682fcb6e5f24aea1dc6801e36fe3efb4e8892ebad22980189fd3b6fcd1a. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZ5AB1765815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3939e33e12e3e10689aedb1454dbf8bd6566e9cdae554c9376e557cc4d022b. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZ5AB1765818.
Éxitos de Parranda y Guasca Prohibida: Solo para Adultos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e96dfcc632ae21bed675b7313f1f2af9d26bafcfd3930f78bf1b343b3682f4. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/COF010001243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a6f1be221f6d0954ac6d29f03ea6e39a8cbacb0c539875fe7acefe7909dce06. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/COF018300499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcddfc24847634b740d160c5b57e84741352d1044c6310cd6c16c849ee59419d. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/ESA012186613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b13294ba1c90456b6b6193c237f99b0ffe0aca15a884bb68d231dba8706eb5. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR96X2587617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf568402f245ed0daa3da0afe8be34446a445b6c2aa1b6788e8c53cd370408b1b. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/FR96X2587620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ed6a3b1501caf0d9e8df428e93bf0cc85621ec8c52e2caa18729186e350950. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FR96X2587621.