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 0xa3a39afd4e9ec98cb766c30e955eb70a7c1d7cd765c1ded135420b4228c5e4a6. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fbc4eae9-96c7-4471-baa4-78defe05ae9d.json and https://artists.proofprofile.net/proofs/artist/fbc4eae9-96c7-4471-baa4-78defe05ae9d.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 0x78c92a453c2914cad5810b601cb4232e02ebb6702d5c31ae0ae4b4064056ec6b. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZWFR2547070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33e1364232a08c40d8dcf43cc30894aeec9a6fff188f0b3adbf3e92901d6a2d. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZWFR2547071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e1a1c4b85a8e0965cf79c4e0e2a23c75bbe29f38092c342efdb942c8cea7c8d. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZWFR2547072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ebc346d446be09ab15d761ebf32dbc2abb10af9878e5240524b726e4764ee4. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZWFR2547073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd744b640ff60f3c6f47b93929e4f0d3fc67ff3963054070262b6321ea8decee. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZWFR2547074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16095f4a4af5b83f205a8689e53db6e4dcbf6ae2ab008065c0137c3e5d65c908. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZWFR2547075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc00832a746c03f1b599a46da1845fd8daf08fa573c863898e9be8b890ff5544b. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZWFU2553112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8669674bc6e58c904b7b2b57a9ff0a85670a4a74130b2e7d29a5d62e95ce6da. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZWFU2553116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b33345143caac9d8bd89d23cbe3a205b229ba00dd5bfb57e2c96d77439215c4. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZWFU2550310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9366b76788a17d259fedd2ef83fbcc4c142e78059c7abf6f3fb5375d6953127b. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZWFU2553163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a7ef29365854d3028bd2a8b65433632d31fdb3daa5c7a8893734d0d7cd5f73d. 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/QZWFX2547086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd6da2c706ef8f5a65526c3b7a79d755aef038d95dc10bb4c45585ef31f0dd9. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFX2547087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d73d5db329527f80cad7053bd6d9120b9ddb46522a887aa66c3f3ab6646a03. 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/QZWFX2547088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c687df75caa114282d33aaa1575a7086fa4db9d9ff9b0c64a5a1a98fbc531bc. 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/QZWFX2547089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ad72ff61a3b00d68b0171b1cca9d532d53a0313568dfc1b6141a7641664750. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZWFX2547090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f0a25b555c8b57a33057cc993fa347c3590321733f8f41f76c7517c7e56d77. 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/QZWFX2547091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a45ab0f3bb37761c17cf1ff154f0b56d774d49ba1b4ac402a1c747755e72294. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZZ7Q2556669.