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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534ad6710786f37695cd19590cd794ecadaa666d60bafb519c73d34bb00a7187. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/225e2121-af96-42fb-b82c-b4f5464f4365.json and https://artists.proofprofile.net/proofs/artist/225e2121-af96-42fb-b82c-b4f5464f4365.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2c8bef414929a8fe9e3bed044ab902a8dbd3283a8edad466dbf6e96de480c3. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZES61986375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f9e2e72482173d3bc872f47bef0d426b475382c6c558f4d3681dfba1b34052. 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/QZES61986380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f743964ad40b645031c7a66a052cfe88b0b90f07cc91003b9c5d0df0645c3a. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QZES61986373.
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 0xb6b248ba5a1fd667d6115c6fb8723e1efedc1ea7623f806c57191112fb9027ea. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZES61986374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f5cde128a257d8533e2979de1a8eb531e8b4f90977f734e75524f6dbaaedc4. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZES61986388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1bcfc3701093ef199516cf2213f1f6e373f39810e0af0a62759bd8676647577. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZES61960011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ba925ca35010eda7dfd0c6b7a7ad7b49acbc71c12963cdfedfe9f623b1bfbd. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:39:00Z), 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/QZES61960016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc833e8f68e5d671cfdce30c301d15e252ea8c7381cd50ead023ec2f38f8db3e8. 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/TCACT1610180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca60864a5b3c8f66886f0547ae8e2ed1b79da0a035cc775db7c4d511bfec96c. 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/QZES81938458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x033c2daf64f068b3695bb2550eb1c4fb7ac6980f2f4f079fe103da4b28a1c3d5. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZDA72175693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3e893be09a915cc7166c8e96ac43141e51c6375653b7b6ea86c3481c55b9c0. 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/QZDA72175695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c81f8f9ff400c855e94f74ed0a62f10c83ca2303903dcfc72ed3cd001f95e28. 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/QZDA72175700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f3815d1c9af1b07c6612a125a73ec239e9b8fa1bc9718f6be401dccb29ec44. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZK6J2091920.
Katru Dienu feat. Jānis Krūmiņš, Edžons & Pionieris[
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e2a17360396bdad3097e94c5ffb9f2f043596660fc0e671b7738b7b57b3769. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZDA72175697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c548485154a5478529d26a45cb36b2c0f8797a0d3f4af9fdc900db1bca96433. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZDA72175701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x504654db888fc9ecd53474c026fdbe1a33b056d9abefd84a53ecd5b00370aaab. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZRP52199246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e012379defa0611bb5a95310516c06e85000093553cc0a03d6dbfd4cba1c9fe. 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/QZTB72224053.