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 0x486b9b9a3ed9f34c57ce826c4795784be4d22323780d46b00a8bedc0a99575a9. 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/7428c533-ed5c-4b03-8944-e3f05aa05c33.json and https://artists.proofprofile.net/proofs/artist/7428c533-ed5c-4b03-8944-e3f05aa05c33.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 0xc3f2cf703a975554c966561e3ba066c1d658d7bd453c8f703d2548e8afdfd563. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/CA5KR1974107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ecdbc856014cbdbc8d3eeba27b20493175701ee1667e516b073f5cc53f9ecd. 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/FRS182077183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5094207628a2f73e76014bcb335f5aa4a24f2ab6cef0f48e27fa31d172bcbdfa. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/FRDX62209710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6108458d9e230ab66eed57847d9bf44fe56759c397aa167ffb124b48b9b946ad. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/FRDX62209690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x960ccb25aa1325d2afbbc458aa8eeb5ba839fd1ed7e8db10ee4162d3d702db22. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DGA0P2320396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3746a5ab3580a6e59a47866d6810022858e74d1e8ea5a2fed633d3ae2a4d9a68. 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/DGA0P2320397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe034904dee7c719aaff0057320046d589e9284a3f2dd2e6a86efc111b7e49e35. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/DGA0P2320398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e05eccf572d044460022361530b3a06e788f7b13849c88d7ae414e8062710fa. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/DGA0P2320399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5eb7fd42ebf4685aa1e05765c64f5a52945099419bc14682b1c26f0376c6564. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FRDX62406590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7332db3011bac1f184b8df8b1b3c010fb4f3008781ce441cc5d57f82b24bb8. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/FRDX62406610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a730864605caf9b18bbf4d0493c96f8b1377b565c3f28774d6c8304b488067f. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/FRDX62500970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x550db4af63f5563b999f8e4536bb11395ff62b0173b5d35d5b59ac8df77d70bf. 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/FRDX62500980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde55cadb471ce876d07296ed03191dfb9c625ad5fc63c46234873cbbd7fb7e24. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/FRDX62500960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f5c4296b2fb16901dcab59302dc0cafef79898eb914935c107337966cdbe2f. 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/GBKQU2225585.
Ellen Allien pres. We Are Not Alone, Pt. 8
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae5cb7bdb6be373efbf9f95ed724cf41430459603aa89d068918b6c22048eaf. 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/DEAE62400053.