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 0x0e4feb5ee2f4f87c2df0648d894ad21fe8e01cdd929fb6e3eb2b51b8b9842ce6. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/768f4b5b-05ba-4842-8edb-4fe8bcb2eb8f.json and https://artists.proofprofile.net/proofs/artist/768f4b5b-05ba-4842-8edb-4fe8bcb2eb8f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sense of Time (Koris vs. DJule) (Koris vs DJule)
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 0xa3d5b43d4ed56f1d1514cd5d7dedf14a3a4492ea7e8946cba7bbe6cf71732e12. 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/LVA100600149.
Jauniešu Koru Koncerts Skonto Stadionā (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf450dabea3eac9688845b4155d2aadd8b57c87490276ae4c33516f7b4552713. 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/LVA100300282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a6b36731aaf3d14b5490dfdd95a6e748a51d7f56a41015f54b619c0422d113. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/LVA100300283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47eeea7ca96896a3cdb10ba144d4e7ccb85a103cd81aff4c96ddb411e9bd38b2. 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/LVA100300284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe316f3a0657586979272318c720e68ed99287eb3580ed88a310d353c2f64d0d7. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/LVA100300285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd6bb3af71fc056861e9f627e1d8034f3604270a4d4d702b12d99cbeeb26ec97. 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/LVA100300286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a39f390fba600ea3a7b263d9bc3ed2d4aa3f8dbdc8ab44578aa046d00d92d88. 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/QM4TX1562719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd27f08f93a03b6bd020558b8ae407b0b8003ecb3aa17ffe67a439983f41641e7. 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/LVA100300288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc66d28fa829a672a80c05ae51c79aa485ea09db2733e3acd4c775f8a660b1b91. 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/LVA100300289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ba89505210e36cad5b0cd83c5e438571cebaf1370525cb27e26ca57b3b1c5a. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/LVA100300292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda4bb3fd477d3a0330b2001f407b54333feb887c9a8edde2d128195893c102e. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/LVA100300294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef4201cce7859d2aa9a735ae2e0ece788b85efa5dbeeddfaf2adae37311abd1. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/LVA100300295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe952453a17eaed66ce163d9ba19342ecbb0478dc4cb00fab6af56b61ce13c31e. 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/LVA100300296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5319e523cdd0bd03d0a781b8368847910547736696b8175869cd577c9161d20d. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/LVA100300297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ad4101bcba5abac068c6ae1497b099c28396dff3c0d7b210bbcfe8adc90924. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/LVA100300299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d692adfe782eea60e621ea3c120ef1d2ae87e67f111aa9b956059cac05987f2. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/LVA100300300.