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 0x6444cf8f133bc8d754cd2b1b823cbeb7fb35e96ec5d7babcc9fa53135b2287e8. 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/36e41d5a-8199-4160-b6e4-9ce94e352973.json and https://artists.proofprofile.net/proofs/artist/36e41d5a-8199-4160-b6e4-9ce94e352973.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 0x7f44b82f062cb971aa6e76a660b2bb45edbd6c1e01e0f5b5255c4c1489891894. 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/USXQS2026307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a9affd7405ffbd4ce1565541d6d586c0318c1a759cf205889670a75b169925b. 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/USXQS2026308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe894256ed8a74abe3151ca48ce3912f2c8595bb85ab94c5b52faabeb00dd1b0e. 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/USXQS2026313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a9b385994eafe8be1e627283ff86ba28b72f8e885beadc5d1ade0cd74bcf5d. 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/USXQS2026309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3346194fc37f1b9f06b5caf1fc5aa5c5a9fe82fbfcc7546d3855a308c7ebcb35. 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/USXQS2026310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aaf451a8457999746eb292ed6e1da5174e13f2f2e50a6ff9946ee2a9d66e99e. 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/USXQS2026312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa226f570b126435a00c3e71006b76cc8567051639166817d4d220925b4fbc3a7. 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/USXQS2026314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5606197954efc407d9a7cf9ae91cc8567fe2bfecbcfe6df04a6bc86d80db3ef6. 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/USCGH2034092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f6aa765829dcc68118b74a76d4e6163bc19417e032533ebeb3cf8b68335b781. 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/USCGH2034096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26093aa2970f7bda4a89f143c0ac6b810b678d76d04c1b06c829eb4b864ee78. 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/USCGH2034099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d758c8352aabbb9bce6bdff1e9161b2a038080dde56476f5aadd8ff31bd1401. 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/USCGH2034100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f090817ac1a28a28ebdd2884df3660a8b1658cda8a38e2193a0b81ce33d181. 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/USCGH2034101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742b05be5e30a0f4cb351fd3121ea29f7864e3696429e9a17319a5dd10de3774. 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/USCGH2034102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e527d5f43e4ec0150e7c9bdf1759e3c2b032ba8c802159f0120788d6b6e730. 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/USCGH2034103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f3339a23349d7b5c263bd9c03990d3063cf89143debbff35f236588b2958dc. 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/QZW9M2373121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc435db66471773f6f334a77432f3b58eb08626a0a4de429e3434e66e56d6f0. 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/QZA742322065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x533463c573ffe5d5f89a3573236e3cd1f9ad65f55344e5117a45c9a2f6630c98. 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/QZA742322060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1fc1e0547445e111089079a958c469e6826ed81a07d072df41776aa9fcfff98. 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/QZA742322058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a75b96f232cc616e772273de5967e44796158cddfab42d078995eb2958376b6. 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/QZA742322041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27687c22320a7abb561e3376a9cc9ea7081f8b9d8a94dd9e2fbec0eb319d5fc. 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/QZA742322043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4237fcfa44113a4f60b737e5b9b0b69a7ce03406263f02c6bef86b5c8f0e8024. 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/CA5KR2405973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7453914650176d814915d705176ac2a955a0ac47211168b8e05a14a05708368b. 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/CA5KR2398319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c61c3440164a36a1d9593fdd5692a22a81c59c56743f43673ef293f52817920. 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/CA5KR2398320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1635d61096d0edfbdaaaadb8693f5060b5a1f08a959021e13b5987bdffbf49f9. 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/CA5KR2398322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e4cf5a28e65afdb340f32142f6976ed0eabc310b621f3c2158b3823592a95e. 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/USXQS2127159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd6be89d533a818938a512ffe7a40e80cc4e0168f09f147fba7d6bd896b628a. 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/USXQS2126735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5606197954efc407d9a7cf9ae91cc8567fe2bfecbcfe6df04a6bc86d80db3ef6. 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/USCGH2034092.