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 0xa51eded714fa50a2e6fbc1808bab5a3eaac309285dc4c789ccfd895cd9f0a674. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bca52bc0-8812-450c-be0a-d0b09026d86b.json and https://artists.proofprofile.net/proofs/artist/bca52bc0-8812-450c-be0a-d0b09026d86b.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 0xf021147f1cedb5e5e6e9de72c260ef8b8435232c7cc555de73641c64b076901e. 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/GBAS91201701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be65368b33eb84d1e54b79d30cd61133285f201b8b154e09bc63bbdc8e67da0. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T16:55:10Z), 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/GBAS91201702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaab07c7cdbcf38fe05df3a8449af46d0cd4a083da0da6b0ea7dacb152482bdb. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T16:00:11Z), 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/GBAS91201703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6e65e4e517d99119406f865b6b90aed633e2bf09d1a81858dcf0c833b078b7. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/JPB531300570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd492814a1986e2b59bb5bda22c7485f35f3490055bb0ff8d4305413f504b6d2b. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:44:41Z), 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/JPA302501001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493a7ae25967f3fbc7b3efe456d2cd126da5336d387deb5191319826b6b88bb4. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/JPA302501002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b53ee38311ee2d0a80393dab21141872cbe82425ed08a6fa0e95bf19aaaddc. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/JPA302501004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62f57000ffd8964dc35c0e7ff8f43d9a1d2434eceeb62441b2f47f078b8ad11. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/JPA302501006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b48c39c2645b2f5048b42a122a0e55ff2d8997afab6d91a16a0872beb49737b. 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/JPA302501015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0d3611ebf35ebcec1eec92fd87964af57f7dc6d3dd1e65d1b943ef04ccb9fb. 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/JPA302501017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe67abe4c0f81527e3ee97425c919ccb4cc4c5f9d7cf56ab94d2bf99861ce8848. 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/USCA20400252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ac83b5c73fc7240838e6ff871f4c5056dea47f0390ede9f2d8baac3f772d79. 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/QM4TX2144174.
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 0xc3b9e6cf4606f7d11aeebc5058c5eedc34687f2a2b4d5b12e0708f9d3f44ee7a. 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/QM4TX2144175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9d18832d2a88af6485126a3718dad6a1332afa41e60d1d5b585902c0fb33ce. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/QMDA72467383.
An anthology of noise and electronic music vol. 5 - fifth a-chronology 1920-2007
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981dc2d1e18a498a6d0a38384920dff76ac8ee179ea4504498f511a46d670f68. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/FR6V89602648.