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 0x20214366d71ac54be6f29310af42dfee7c2006286ac91895a6edeb02e0ac128b. 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/9e5e24d3-4d1f-4996-a2cd-a24efbedbee7.json and https://artists.proofprofile.net/proofs/artist/9e5e24d3-4d1f-4996-a2cd-a24efbedbee7.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 0xa0d12954279c241d93da19f7b1bf7ae80bc4d0b884b223353f260537973078b1. 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/DGA062237468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15864bae57c39b04415c096443275e7a44546201df90dff3439eadcf7b11f076. 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/TCAIT2416727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74dde509305d351e69a3e9b102e7ddc5d8bf421b5c445ac2a02ba001c9b087d. 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/FR10S2598981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b9d09cd08ab15127bad87b1936a2ca13b07cc5bef71b482ddcaa5bea8d95c0b. 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/FR10S2598985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a6214f7fc4fd77b6bc76ba8eb74003c86c6bbb19f891a7dc17c7d37ec1438c8. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/FR10S2598988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b27b10861fadb2f98caf97a3feb397a4fd0106eec4c0524b39c35ea4a80dbc. 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/FR10S2598990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d9d762763f907c787fa36f5570de30b9d2a343cf66b14b9db113eb852ea24b. 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/FR10S2598993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe64712ad689d4f770c6cce26db02f758641f3b4c1096ac615f6273dadbfb9f00. 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/FR10S2598996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640c8f5d5b9589a9e0f371734b42b3cd348a869b19bc7422f999df64e980bd73. 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/FR10S2598997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ff126d356c8d1c70e78cf2172d29e239ccad1a38469235eae1933c2e2f1e3f. 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/FR10S2599002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984d9a997c5c5c8e478112e950ad11394742ca315516b52bf4628d0275e9f23f. 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/FR10S2599004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f17bfcd8a1621d59413835e217d0666ef9ca400dc2a6ee3572147fb4ce8660d. 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/DGA082202329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a64c7d461f46030831e9a8e1c29503ad0d8d0d776edb90c1bf584bf23551a90. 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/DGA082202330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc06713992e154af9a8f1698ed9892e3b95451d6d6992e2ef627f801210e178b7. 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/DGA082202333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d05dd9e6bf6663228bf76e4185bc125010abce6a0f99a528cef19e69ddc5b7f. 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/DGA082202334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f5d3a3a98dc1aafd33d8fabbed0c109af8b6dadbbac4e7fb2f65fb65ad44c3. 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/DGA082202335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee91aeedfbc366657bfda41b2f2ea17bc65f8ce4996d65a88e2cae614e2989ee. 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/DGA082202337.