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 0x8da8094eb4e20fee0313d7193a1a0e8bff68b8a3b0154584b02bc897e10f54fd. 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/671f2b8e-f743-4308-b377-9b324c622a88.json and https://artists.proofprofile.net/proofs/artist/671f2b8e-f743-4308-b377-9b324c622a88.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 0x38a5f3148ddbfe9c57a377cbeaa8379012be2af61529e0ab0f5533ef6a4fff72. 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/USSTT2300083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f92c0820d52d630159233c3510be09d9641b4949b52b8d0a3983adc5b865ebd. 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/USSTT2300085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ca3eb8f76f9b425a6d5c16092c175689d33f965804abe9f38f2f6c6628e4b4. 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/USSTT2300086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59cde0544f8f64a10ded81c4f47d792861cc0d5665f1ef9677f4eecc78023616. 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/USSTT2300089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcedbe25ac2057317c83e892cc95af18c137c7769ab1d18d946b0849b66af8f75. 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/USSTT2300090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a5aed0e2d4ff8dd7a175514c477cdb101935f1608833327094298ea589415d. 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/USSTT2300091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd580691a33ffb57ff7fe03e012b24d0739fa5c159d3656986131d5cd97daba1f. 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/USSTT2000041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83fa7b77628702a46e4d4d1a5c57d50a731cd134a2699a49b0a0697b22e087cd. 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/USSTT2000042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ea7d578afd23cd4fb89745461516793eb39f8ebff1be21728ad00d79bbc6d4. 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/USSTT2000043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee34fcc5d51fcc78ffb817898930d9fa57f0490ba319c3b8d3cc8f130af6cf4a. 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/USSTT2000044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7524d8be0b953454404ff76753c89ab3c070827c14cc2719533b14518dd1315. 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/QZB4J1801724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd455f949b9bf9d06acc31f02d9a256a120b1f68a97e0f02381f89b5f5c0d87d4. 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/USSTT2300035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9a1654ac16ff6849d2d9b619a114b1639d370a220583d4faf55863a20b85d7. 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/USSTT2300036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce092f9f101df254e00ca755ee0e38fc6c0fd84729b4b35532763f0638b2029e. 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/USSTT2300037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4e9deaec2710bcd11ebe5dc74728d28d0db620a0307a325d171ffa01afb1fd. 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/USSTT2100320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e8b6113a5c10f02495abf9b2961da2a8f65025fa926da7e444721fcdf7d32be. 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/QZES81816620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd580691a33ffb57ff7fe03e012b24d0739fa5c159d3656986131d5cd97daba1f. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USSTT2000041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83fa7b77628702a46e4d4d1a5c57d50a731cd134a2699a49b0a0697b22e087cd. 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/USSTT2000042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ea7d578afd23cd4fb89745461516793eb39f8ebff1be21728ad00d79bbc6d4. 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/USSTT2000043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee34fcc5d51fcc78ffb817898930d9fa57f0490ba319c3b8d3cc8f130af6cf4a. 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/USSTT2000044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88788439696144372f27bd84c4eff3d5c1a2dab680f2eced9c0b8e6c4fd6d784. 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/QZB4J1801726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9d7edc048e4a2e700840abc891a4f96fe3d48a1f2a9a892abea1db033bbfc7. 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/QZB4J1801727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4e9deaec2710bcd11ebe5dc74728d28d0db620a0307a325d171ffa01afb1fd. 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/USSTT2100320.