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 0xa80910ceef189855ca384c1bcefd1c51bccf1c59229fc500c0f66af8aa377f27. 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/ab10a3dc-5763-4f65-beb2-260a7be2f0e0.json and https://artists.proofprofile.net/proofs/artist/ab10a3dc-5763-4f65-beb2-260a7be2f0e0.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 0x2b046ccdf8492508dae144ddaa8aedbe10e3ed07dec072ab5284d3ff4ebaf89a. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/SE62M2272347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34caa7044a9dd549fb7de4e2ef16bdcd091eef050b5f201f591dd4cc453255c. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/SE6XY2324780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa1dcc76a38fc7560b9f7c33cb7ee6bdaa046e09d8bf92570657f16342c051a. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/SE6SA2326908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45c8777780f40569b14a53ee0e908ba909216bc69cf3aa891707678e17615f9. 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/SE6A92399126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd33d3adff25950631ed7e577055f404ebe18b284557e0bff558b198fe96741. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/SE6HN2458063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31618b001153c14002e18424debff02891c6be4fdd1e0dcf9d0dac27aa51f637. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/SE6HN2485846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x415a7322cfaa94e3c002638925717ac846a62758dfe0eb917e01909aaff5d1bd. 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/SE6QE2455576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32f60578ca3b033298403659febff817524f53a6c8dcfb34661978dbf825fb2. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/SE6SA2429262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c339b42606204e29ffdd23c49d2d0aa3447392e9d0b2658b96ac8682907d038. Chain 2 (Bitcoin): anchored in block 957668 (2026-07-12T06:54:37Z), 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/SE6SA2426426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa3a002b56b167bd4181c8230711bd41e7a94c909bdef31b17ffdd6c64d0ee0e. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/SE6SA2429263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6825dbb761663f29fcec90216c433e3fe4fd839682b74044aec4fccd0417c865. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/SE6SA2437071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebeb9708aa0ce5748035fd9bffbdb1b06f5eb1091ceebb6bf7eaaf5923b167fe. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE6SA2426428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf96c1b5ce4086d09ab9ecb37d6db433c8b4cf855be56c2c84e36fff224aff3e. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/SE6XY2532843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703cad71d5507513b9e8e56d4144f35b0dee2c1162af60d5bd537accf3e57527. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/SE6XY2584546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d26dcfc883e098c9dd6f0cb8d5d26a7ebf4a9429aa2abf4bf28cd90412ac86. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/SE6XX2588175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148e6ffb7d38834159d7d3ee9975272dcaed5f66b28a0584b3faf7ec072e2cbc. 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/SE6XX2588176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d74049df68be6f25271f3e2ddfa26e742e9e389076b67482286ec205f04a570. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/SE6I32510437.