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 0xeaae782d822c6d32f73018f920c7014b9e9cc8501ed08af9352884bf32a1fec5. 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/304a9cfb-5063-4e13-8181-73ee76176e03.json and https://artists.proofprofile.net/proofs/artist/304a9cfb-5063-4e13-8181-73ee76176e03.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 0x7d4e0837c6134d3c6a99bde77212bc1d0ed5024c8393782129348288fc6d2d52. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/DEH742217184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b3e50fd5424d62f36949af9f3a4cd48c4e7f172cc50b468cc3c60faae97cd2. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DEH742217185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1b6cb4f142e62fe6eee5e0d6849dabc04582b8cb410ced8f6178dcf510b8b9. 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/USNRS2040164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe33e83aee6482cee5951a17c9cc49a06adeae23351d791b0736febeb1f4df7. 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/GBKQU2241075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84df3aa700c91438ac43d47f95b284fc737182d3e1a753b01454198d2aa389c3. 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/GBKQU2241076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd3a0623555cfbefb7dc67d11e3e4a32047799a781adeb659b38bbcbb0f39ccd. 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/CA5KR2318556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92121b77d5b9e3b31cd187faccb84f72696f1f28cf95a5204b4eb8f35f555dc. 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/GRLP12222344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a1dae492bf949846ffe300f3f14633efd40994170c6044ba654211e5c907f2. 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/GRLP12222345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d2b6e2d7ad4f66a70578a89c271c764bd8b66920f1eadd99041d8d56e8b257. 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/GRLP12222346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e56a0ff53151efe0775da80476455d2e826d2595bcc3f76e7162fc70f9f796. 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/CA5KR0018773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b71f0a2d6462d83d5927a35456f09cb2c6fb9fa5eefc00e4f608a02d8894952. 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/CA5KR2187441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec6c337cefa3d70fc485388e68854e50fc656f2a92893c7130543dfb48ca394. 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/CA5KR2181977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f08d89e59aa6b0b0e60032aa74931d368354988c04bb1a75664d7ddb872dba4. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/CA5KR2182631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x591ca51a1421bb1f5723a75993eb0967e29b66903ca48911cb08568c733ca635. 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/CA5KR2182632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00080dac28d86148dc5965e7cfcabdff13dd6b90a1015890255dcf074ca62efc. 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/UKR6V2113174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010ec5871ab1b33b1bae83e41a26149534dd879258c1598415a2ad992dfac32c. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/CA5KR2110465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x097749d292358c92471fd3a9b4e7b62f168d8dc266a7adf2a1b3ed6fa263e114. 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/CA5KR2081761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b55c7d8ba6225cd53ef40252ab5485b137e88ce7f285b898a248d8dc1ed1418. 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/ITA061301919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87bf2b7f264ed199f921ff5f137a500a2095882923e5acc1d3c0196dbe7ed8c. 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/GRLP11931451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e41dd2b2f2616da03614217b4fc153f7a5d624a74c572ec33a57e558a47800. 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/GRLP11931452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02edd55877499897cccee8c5174b64bc123a3d4fdf0a3e96aa9ff3d631bb5bbe. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/GRLP11931421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59682ebb642f2cdf387bb6feaa1854838845c79ecace37f714869ef4fd856686. 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/CA5KR1904516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1ee52573b956e78a0665696ac7352ed0e19c9bfe85889b16b1efba87ac0312. 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/QZG2X2414328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad2726c116afe3da5508c28166b58cf6f28b8534489a2c2f6b05948069e3c607. 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/QZG2X2411497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b16f183e8540a07a9da330bf6041f6d625e6131d9d63fa723be8cbd53c4995. 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/QZWV32473284.