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 0x9905c5a0ebde4b04706e20a324c6e19282bcaf98333c6c859a1ded26536b561c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/54f4508c-8b49-48b1-80c9-7842c85098e0.json and https://artists.proofprofile.net/proofs/artist/54f4508c-8b49-48b1-80c9-7842c85098e0.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 0xec56898b10d6ec9a72edc77dac134711a4b20dfe9b620e992c33f120ee2d3a0f. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/TCAGT2350946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eae28a608ccd1fca4fdc2f20f7c149f2850aae8f1a4f3df4e8110293f83db08. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:41:19Z), 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/TCAGT2351058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f01cdf445a99a8b459233be070da99f620f034208374f741c4ef962cf1d97ee. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZMEP2350294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6407d209113086192f929d4b23f1bbbafc5773a2b375304af823c3380466dae8. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/QZHNB2432263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae1463faddefffac42576f623e2257a74513e000fe7869ebb84c7b3c87b30d90. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZK6J2432113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff182ddb266b9460da9a42c3aa6368e3d65fd81146c8e195b84d829e915f637. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:40:41Z), 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/USLD91763730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945e014b57317dfc46667acf8dae8ea9c2ec7d769fe67bf744ad7e3d0bed600d. 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/USLD91770599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696b986c95fa53ea2de074b794858eb0b1d762cce0c3d61134faa67175d43548. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USLD91770600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ace9e487e553d7330dd67335ca729c83790f0c936e4f4ce346f3838d980e49. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USLD91770601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6ae2cda0565829b4ac815498356586554122e33f382d930b93670ff86a4773. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:11:49Z), 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/USLD91770602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ae7ea47c9451254ac5b811e4b60de5ec52f55b9e383646e0033a6aa273f1c5. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/USLD91770603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d4da64edbf8a6932a47492c4960766cf093d6482af33b7308f7da74516ab31. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/USLD91770604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ccdace87e6b153832f8b1f8bcf2954de6cbc9cc1ca3a4456c89454f4722d796. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/USLD91770605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d204a6d5f13a291b1e9510af5d301f7973a84a88dc90e7318a12160f8e0a68b. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/USLD91770606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12c63f905b3ce7c675bf4e565424fadd232399596bee0fd5fe2f4450ffb98ac. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USLD91770607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa16e46357a0a6890df0b155b39fccfdf4fc690d7dc3787f4a1fadfa180ce9209. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/USLD91765238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcddeeab0068f71fea31323e650b7a1618ab70bc74a9e63edece1fdb47852813. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZJ842401946.