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 0x3d82ee59f03c8c17e0c07678e55e781454c348747355484049952ab0bb58eabb. 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/70e9ad20-5a15-4639-892d-083368ceacd0.json and https://artists.proofprofile.net/proofs/artist/70e9ad20-5a15-4639-892d-083368ceacd0.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 0x4f3ed1068702a2f19435a1f8bd9cb1d094a11053743ed62aba0786eca2fc11a7. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QMFMF2008470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921cc16f7042330a0bf74e249f0cfb8ed72e33d18c335052f7471a1de839ccb9. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/NLT2H2100698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a82f3b84ab81086fc10abb602b779bee3326762fed5d0ed4c653c2eb04f0db8. 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/QM4TX2218821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56eecdd6eea47eaaa30f5f1386dfc5ea755d297cdc700417cb635ab42e019980. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USA2P2300203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e1d532ba77000591546435ed3e5d4e5736d7f5f2b064e8d36881f8e0a4f53e. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/GB2LD2310058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5021c65465defb14774bb13493237b040ddbe13b0e3099edab21895c30254dd7. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/GB2LD2310042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84bdf5a36c317bda5db92b9d6aa0bd08ad56a009e5ebe99e03b9ab0c3ec26590. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:03:49Z), 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/GB2LD2310109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7115732aaa7c59dadace40eeb3c1cbfef828c89ba476edee2cb8aa89e122e367. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GB2LD2310247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x100a65a99bf1c0c828f6d9c142c87a1ed80b167edb11cc51256189dd59443a33. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLQ8D2300576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560a2c0764c056272cfde2561cd527ff87b0344ec9bc76a649bf77be2a1889e7. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/NLQ8D2300651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2afc7b93248190c829919e3fda164fa0db9f65a15739ceba0c217f562bfa9425. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/NL9KQ2390207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1988b90afafdb179ac549ca6bc60f08581bac963b95746209f28131c79d23925. 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/BCCNG2200415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802c2aa63a2f55f6aaacf0c7caf9f2db35dd628d9b076c2921392d5623f86a2f. 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/GBLV62308486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e304f57e528ca5c0102f710d6da8f68e1117c74b2593da8660e2a19715f2c63. 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/NLQ8D2201445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ca5adcb80ebad4d0b4f6bb3feccd2db06717469660f983232cda5fe49f62cc. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NL8RL2424315.