thumb|The Aleksanteri Institute in Helsinki, Finland (2021) An institute is an organizational body created for a certain purpose. They are often research organisations (research institutes) created
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 0x76df6b3fb303f1ab032232fd2387a3d48bf08a3aff30d9781bca32a84a34d5aa. 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/8f6d1e04-c60e-458f-b329-687c7352bf2f.json and https://artists.proofprofile.net/proofs/artist/8f6d1e04-c60e-458f-b329-687c7352bf2f.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 0xa227d3db3f8b2f6098521822a1e3ff8b3e048dce0899ad9d5690a8d248c82b89. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USUM70500729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc2b1a00b03b5b1b5da23ba1203c7b6a60e77f02faee97c464f89c75e0a56c1. 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/USUM70502091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807016f3e854c7fbd60858f590553f9ef9840f1995a3d2f26b6e5c214446f83e. 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/USUM70502082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5620725de8424f61eef588bac0ff18b37f658c8de2d5fdb7d9040c5b7fc7b89. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:33:13Z), 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/USUM70502081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d5720a1735384e6f22dcea78dbe9a2c143f42e9d5aa08857e8e8ea244155ea. 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/USUM70502089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aead6ff255a269c1073c100d3b2b26431f8e4c3b7deed6d71315da8cb65eb54. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USUM70502080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed698af619ebceafae49c4cef0fdd72a8371bd12f5cab53e026251d12ec06cf. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USUM70500195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd29ea6f988a1a1d8c651dc6862645f497877ef0f5689df66afb36f364973ca05. 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/USUM70502086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88579fe61bd6cc8f1054cda38404f167db2c03bd48e3450f950d86ee275b831a. 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/USUM70502079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081d77203346b7daa2441307cdd13259ad07d45414ae71cd049dafc4c9149df4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:32:27Z), 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/USUM70502085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6266dab5e0257611e5c862c7abd50677f584d22b7c80fa0e0353a61ae68ea43e. 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/USUM70502083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x384a8d563aad478d81b9aac24e2fc162d986850e43a064817e24121aacc09474. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USUM70502084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11775eb5c955e9070791ec7c9cbfebcf137be24be89ff44420432b6a30f6e0b9. 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/USUM70502410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784c890fc75e4c6f072956baaac053935550ef7946e4bbc5ab399cf51e9e8ef1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:23:35Z), 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/QMQJV1300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cbcb7814763341c45cf120fbb897020306ae1015169051512330a43820b0435. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:57:41Z), 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/USUM70502411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95786dd1eda039282fc9d2e32d1be0f28bec8d5e338f286ce179016b14e453aa. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QMQJV1300005.
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