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 0xed9bc6f4426275fec3b0a02613714e4fe4bed846c1c14fe6f87d25d055ce9db5. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f7d72bd1-fe7b-4dbc-8a46-2052b7a4a79a.json and https://artists.proofprofile.net/proofs/artist/f7d72bd1-fe7b-4dbc-8a46-2052b7a4a79a.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 0xfecf743fdd724fb8b840a2fbae150816ae050ce96fdf65e33b8fc37ef8b7ea0b. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZNWU2285768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca6db3e241d4fa15d62d8112ee5bd5996b6d7c3a13d079b0cf301fb64b2903b4. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QZNWU2285769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347b13d63f161bfc5f5258bf7c15980163233672a6f8123e15d2bbb02010d4bf. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZNWU2285770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc008da2597ffc6a8d1e9c9166f9c92a307f3537f81f951e561b4b297bc614a23. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZNWU2285771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2442703a0166263f178ed98a32a85bd45f8547e7cef520d450a6fda0d2b379. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZNWU2285772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33092d602ce819e2fa0201849c5137d290ceb552f9ea3891595d164f351562bd. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZNWU2285773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24935e50567e708b25e010c2fe962e4e5a6376662ea398f1c58d9009db911183. 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/US7VG2486211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a656b7e977d4b09c538835b7071ec91e15c6a420e37b9135a7f61ce132b38d. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/US7VG2486212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099453c5071307d6ddec2279271392c9c15ae6fc2841291bcd21c7fff850e07b. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/US7VG2486213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e349c1063407691942f0e5559c6cc8b1876be3b8cfc3677eec40bd792fc4a0d. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/US7VG2486214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59c65340b687ceeb09dc8d815ae7e024bf8201933501c30ad89465b01451fc8. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/US7VG2486216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bdfb797f63b8af116b9944ceb4eb8fc1ec4a2fc1065028f1dacbe3a4495ada8. 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/US7VG2486218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dca3790abb8d71bfc80a4629e31488098827ca329686c8fa3dca2db7a832aa9. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/US7VG2486219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207da18ecb9d14e092a4b8b00576d16870c3e602f141f6d1adb338f5c9ce892e. 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/QZGLS2283425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa0dd922a5e25f8cbbdf2f6fc31630bbe6e3cda1c79afc9d4a257ad146fe1691. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZGLS2283426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a94fec4cb56ab6c44e8d36c98ed0ff5cbdc273e5380ccc8562c68d059388f4. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QZW9M2275368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f4131b472cabd88b4ded0c7eed7bd76b3731440dc975831164e647c7a98b6f. 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/QZNJV2116352.
Tiempo de la Maquina Vol 1 ( Bareto Secreto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8947fd345dc3b33050c6959b59f252eff4e2b1e62ee735d4494e76b3f01956. 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/QZTVM2323722.