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 0x70069d90049482c9bad97d19f0d5e240d059def943904dee8a7016410302b27d. 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/dc01c229-305b-424b-8d77-394d0a144c21.json and https://artists.proofprofile.net/proofs/artist/dc01c229-305b-424b-8d77-394d0a144c21.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 0xc8453278c96f0ab04b45cdb80deecfce45ae9b9d253ea4eb4bfaad77e320bbde. 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/NLT2H2200085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2209d51163604cbcaa8ef30425a0114a019f6d51439800663282a105a585905d. 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/QM6MZ2224958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf68133b2ffb061b93692154e8d1d76a6e4ca469d9a7af1cf5b8e03c427975d1. 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/TCAFN2165564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e7328509c02942ecc3c5ae8b9e65ce7ee9319846448075daed22759b792e27a. 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/QZNWX2071274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa519374c1d68b6b98afa893cacbfcee2545730f27ca9734ecebe8381bba11995. 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/NLT2H2300449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5205dc05c5d06eae855e37534e5dde5bb614b3b820486fb5a15d2879a930bd05. 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/NLT2H2400900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1071e3494969e8dd2f938669b148c60f09565b2db387a19fc1f30b45040d55. 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/QM4TX2425208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f9064bdcf3d129e0e91eda108840b787f0eb73865313c346c2c616a5ae262e. 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/NLT2H2200493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8829d8137f4d35fdbbd8a16eda30fc44730d335980e55a8de409b6a53cb4aa06. 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/QM4TW2280406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6320c689bd1bca6381fe3c7612ce0723211c1321e0a8405fb9413133a8c69e2b. 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/QZKDK2244415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760206777141cf92fad15a11d4e8cc666eaf2b9fa1b33792c085edf550634806. 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/QZNFJ2200155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb25e6204293cfe5daf0d82deb08470124a006b11f4777dda90c4a0ce9173f53. 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/DEWW42100242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bea1a908227b5ee38d2a5527756c21ef91f2709bb658a4435ac7c51a97e3c08. 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/NLT2H2100653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a240031482af6190568a2bb42190e9e166f9f82de999f02e666024df27b463d. 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/QZHNC2126398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb563d07424e1ad66720892587fe9dd988e092db5974e31da0c923243c39235fb. 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/QM6N22119617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd8dee832119e4f21d2b6b90238354568f5af6c4277af66edf0f0744bb56e34. 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/NLT2H2100149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c96c1dc884e5096688dd01e53e9984d6a8aa4055b5b77c3ec9ee79ebc98957. 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/QM4TW2171038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3fe6cec0ba2328458464693b40e6b47a5fd90edd5d364080c3750d09f467e28. 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/QZMEN2088915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382151909e63df839efc96885a3359a1b3abb0772ed7c4fc33cb6192510cbcb2. 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/TCAEW2040879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ca376f19a7d0dafe3d0aa07430d9ef95a29fa58a6d2353848602455c57d8ba. 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/TCAET2051892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26fdd4c76fc5fc0de38fa6e1dd58f9d2b4f088c77124c1736f9d1d3b1380a627. 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/TCAER2081555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91fe6f066963799b2c0ca9b995be906a6a371701e33a12ac642711b3f7799413. 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/GBSMU7469383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f862780a775d69aeec3d4f01e4750749d02a42119828ffcf5ab0881d526bfd3. 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/GBSMU6936851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7e768a756def1464bbbb38b45d8b7c95c12071fd763876b36c3d8c18ce3b3b. 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/GBSMU6712928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f41ada0dec5e9d070453f398886584f3b5600d25a1e1bb6f63134e61aa6ed83. 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/NLT2H2100419.