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 0xd8c9f2e560053d0df8206db9c73be0984036231b3d2d14b82c5c10539688c604. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/da6a313a-195f-496c-be87-901e406436c8.json and https://artists.proofprofile.net/proofs/artist/da6a313a-195f-496c-be87-901e406436c8.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 0x46000a70ae73576a7b3f09c7a16978f62083c0514900d8cb0a4603ce5ed7f099. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T22:02:08Z), 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/QZFYX2152575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a9d51ce322264eb447f631b1fd2e16b3cbee2686e03a50e49ba9ade879f19d1. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZNWR2149590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe259c225bab1caebb4419af049805849dd0cc01500067fa0d3a46116e5381063. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/QZDA72451811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58cd9b4364cf24c37a19ceaee7c806249bba38cafb8f14fc0d9756f3e8db458b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZDA62473049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe073800845d76c836dcbe4527fd106322f558cd299cc5a1ddb0fe9852a2c3a6f. 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/QZNWV2466351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9270c03edd28e0188f287e53ef9f86be6b7b2411e780a0f9afaa73ee01a25379. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:34:48Z), 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/QZRP42440413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46973278bed15e50534b642b652c891b12fc1dba91426a1852f042549fe01008. 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/QZTAZ2435693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x991a794a74c3d46cdb0023729b96930c3f5b3e895151695680bbf9a46db5ea91. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTAZ2435724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4592b2075e1f1b13555bd120fafa555f519166bfdda228c189498d37e8d920. 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/QZWFM2460987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99cdc958081da05bcf7b87991cb74500bb1f7a07c2756df1c39712ffc4565d0f. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZWFM2462473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46973278bed15e50534b642b652c891b12fc1dba91426a1852f042549fe01008. 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/QZTAZ2435693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe259c225bab1caebb4419af049805849dd0cc01500067fa0d3a46116e5381063. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:06:22Z), 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/QZDA72451811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99cdc958081da05bcf7b87991cb74500bb1f7a07c2756df1c39712ffc4565d0f. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZWFM2462473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x991a794a74c3d46cdb0023729b96930c3f5b3e895151695680bbf9a46db5ea91. 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/QZTAZ2435724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4592b2075e1f1b13555bd120fafa555f519166bfdda228c189498d37e8d920. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZWFM2460987.