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 0xeb9b8c271662c39967f9ecce8021ff3aaaa7a87d2f48abe134a0664acca13fbf. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3b4dcd06-c195-4b6e-8735-9ab28ff0e994.json and https://artists.proofprofile.net/proofs/artist/3b4dcd06-c195-4b6e-8735-9ab28ff0e994.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 0x56504e082f3d877240640855768a6bcb0a7b6bf2877943ea9ba80b9374eef160. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEG931750103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68205acaf85eda517ce15f16ab1970291cd4f283702000da4817126dc376679e. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/DEG931750104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4453612045a5431d065c20f812b5de2c1bc6d95dbfaec57875f5b774cab6c42. 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/DEG931750105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d7debf8d2d82c7591849e06336ea8410064161d87bf9cbbbc420937898afd5. 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/DEG931750106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3a5c427f7438453b16079826b714656676457ad1cadabc871a156ab553af63. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/DEG931750107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da5b6ccc3b5fc50c83c19e79640978426e55b7418756790920935d76043ec00. 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/DEG931750108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e2142c03d59f5844baefc64df50b8531cae6193419e08311e29fd541012c7c. 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/DEG931750109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26eb8c537415289ed8353d6598b20b44d7252f3b74ad305fbab6c75ab404e3a6. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/DEG931750110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457edb766800c0a292c0fcb23ccef721aa0d064022fa6b124af2ce34b19a2e7f. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/DEG931750111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4299caf7b3cdb430096b647e4753a58f0dbe128a554ff8056c14d74bad2549b1. 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/DEX260919001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85a9ce3f16011b9e180e5b6e70ba978ae6dfca246e6a1fb95ad6fa2b6adcc56. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEX260919002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c8fad8dc5181ec0dceec3b83d5e267568240cf8ef4486956a1d180361223493. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/DEX260919004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x181a9f733c2e8f26c070c65dd4c1beb503eaf3570802e9a0154092a07cc3ec27. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DEX260919011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae48f159c3a7359f89174857150064eac841b5681ad90c4175d7784d33bd4189. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/DEX260919012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5381c1092333117d227cb8469891484d53d1ea705fbcd77982dbaacd353369d2. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/DEX260905001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd76e9f3a7aa5d02423d219c78757dd64197e5f9788cada2f52a163744a7fdbba. 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/DEX260905002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16364195637d52a4e5fcdaf01e8f54d7d3cc721d01365f45199f9bf04339c96. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEX260905009.