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 0x5827e6ba0d0363e6350f9b14e91082c1eeafc565ca6bf15277169e89668da2bd. 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/7978f243-80db-4774-8f8a-9a7ed56f3040.json and https://artists.proofprofile.net/proofs/artist/7978f243-80db-4774-8f8a-9a7ed56f3040.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 0xa8801cc8867e20bc762acda2f9f2b79edf5346f4add792274a02e213c9fd2ab1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TRUM72000122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3361824f16cd34d54e1602091803d12e3475c58ddfe8e8812adae82bcba0df40. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TRUM72000092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93177cdd66dacde67049fe909380086fcd026aa6e6363ee1b438af8d2382c867. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/TRUM72000126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ee75d528f37da1928be39ca7953fd2abb83b545eb50398efc842220a1217ac. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TRUM72000065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0274718ee3cfb00ffa7c42e4d062943665e9ecd9fdb2148387003644cc438bf. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/QZMEN2115779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ae468050451f3cddae4438994f4d495dbb522efa09aadda8b8e582e89c5109. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/TRBDY2356606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b69a0e96256a83575906e196779ead1148d1eeedf1c995ac7009d4ffd6e9d79. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/TRBDY2356605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15510f5fc00233f1fd027fa7bbfdc18475a7d4cb7c9e0f56ecbb640239b28c4a. 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/FRX762464088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d360dc836221204104ec4ddf718d758185bd61b8be9c095b9cb9668982fe345. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/FRX762546467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383080125b23726c163cbec21f6244215b88c87accfc4bb328f6e8cb20291de0. 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/FR96X1928828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc174b5e22e5e6b6cba9ab6834a7ed338caac9d4e452ddeb5dfe95ab61d835cab. 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/FR96X1928821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa18ffe6ea07de793a3edec2d04050f088e2bb8aeba78a746d1bc3ebfe986cfb. 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/FRX762463440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59cd1024f8146b176007c3dff77a6e605563b46de80d2b68dfbb62fe3b1c73a. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/TRUM72000101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889723e5123a8ebe1f0c9c3548912f304fa4cef1fc2a01170f6baa5452ae3aa8. 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/FRX452306460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59cd1024f8146b176007c3dff77a6e605563b46de80d2b68dfbb62fe3b1c73a. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/TRUM72000101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177629288aaa9eb9dda99b809fbcbc1f1702123cb775fd4f08536cc945890472. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DGA072346751.