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 0x3f9ebd3927ebcc91d045a320193eda13e2f89f7e31e54aab1f1ad7053b654532. 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/a31e7e57-df84-47b4-97e4-8f683782e6ef.json and https://artists.proofprofile.net/proofs/artist/a31e7e57-df84-47b4-97e4-8f683782e6ef.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 0x518af6af9092f85a540f0f872c67f842802b6477f47b37edd430ba3f9a5e2376. 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/ITFGO2300107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf015585858d04234bddebd38594b4b46823de402bca4bc586e8041c55e40df30. 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/DEEC33501231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7bff66e1ba2b3aa3bf86e816f8fff116f4dc619a86fb02827b34a6a8f8e36fb. 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/GBKQU2395654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b5c115f93a71c300b34470e3dba5eaa9d4a7b60666bfb50d720a490daae2f78. 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/GBKQU2395655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084973514450b42572f5ac0d32ca4e8d94a4f6b23182370d006bc388d703d473. 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/GBKQU2395656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5281f058a74a79f21f2a6c8c98da9ac28bf148183df5cb60ca316e4d0ec0ac13. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZU7C2300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcec33b6931485f9384db96665354cfd6bec1e65ce8820b61405778b8af73389c. 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/GBKQU2364720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79798ba562e66bd569c1a71cf6fd7a1f0a7e9db3d7a9739f08ddef431c945cf5. 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/US83Z2322863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf55b595c1bd3df606ae00655bf9231056b367eed888adc0c6bb8b09e1c52a92. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ITFGO2300048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e26097a18d8f6db751ae93d0ba0bd6c6119d7ed096deb8899220afc32054b0c. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QZES92329185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe940314b02fc4242cca479aafacf657f9bc169692a75ea70d169051e0a1d75da. 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/GBKQU2337136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915961c51f26f82002cc69b9789f2d07287d032f43859d4924e69069790574e8. 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/GBKQU2324157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951b27d50e469729ec2eaa8da5398fa49d80821ad7cbba753a29edf5a71b3b88. 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/PT1GK2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x771127b34435c5b3fa1df38c581b0d0d48a9b17e38c7b684a1b19fe899dc6763. 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/GBLV62211130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf9de69875acadd0277f0844466066bee5facadc7561e9c75cc9c0b58b4448d8. 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/GBLV62211131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e9db768669897a1dfc9e3854f5e711d4011ccd6c10bf1709d1e97b3eb342a6. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:35:06Z), 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/PT1GK2200076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ff7d429dc70ffee59a8422bfc1b842cb49efd2ef7e93b304b73d98472ce6d4. 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/PT1GK2200039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5735a271ab78a11b2490b2ed610b649807e963f74a9c3e6f30393168e3896f8c. 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/PT1GK2200040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ad07bc500558dee04d8a419a1f1887ef0f93c7bbc1ffe9c6804f04e256764f. 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/PT1GK2200041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a636032dc4fbbd5be462f0f61e3944f1ce539553e6b9842e6de2a23620b51a2. 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/PT1GK2200042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6f5203c8d1669b32d36f0ca7b4c0288e6aff817931861b5f0de787caee908e. 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/DEH742207362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8149bbb731d6a0d3a5becef5fdcbda891139b646a0d811beb419ce27aa8bee57. 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/PT1GK2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8c10c964931e6d744726f83544c6b8e38186a2048ca1575b04c3be34079cb9. 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/GBKQU2282852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b68903f551dd4d6c472006f12e1145a3761d1f382d7d1e9037cfb49e7aa59f. 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/DEBE72300943.