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 0xcff87cf2b7af8f935937ea66d6ff93d18028546801fc65f53768a504ab7c8c96. 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/1ecdf679-68ae-4295-bd81-c6f2b8ae9893.json and https://artists.proofprofile.net/proofs/artist/1ecdf679-68ae-4295-bd81-c6f2b8ae9893.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 0xf42fde4d39a2c6a51aabb7f4abd3d2a4808ddb0c81855acd28b15c927d6177ee. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:52:38Z), 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/QZNWQ2017110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a56bdc474deb873e517af56b9835c4f35f13aa0f318f870bf665e52c0fac1a7. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZNWQ2017113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666898a94327c7f1b4c9fdef5c608634785f582302ea0d8c9b56c41479b9b792. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZNWQ2008729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef585538447e374267a6ac83e2b5b072b1a99cd9b7afadf930180acd55608428. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZNWQ2011045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7be1264de39bb67649a7d47f9b928e228156e1e9733e6eab877efc7cb50e1f. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:44:27Z), 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/QZNWQ2011046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31480ed42e44f9f8be643dae253468690aa6aeddd6cee75248e31d80c5482a0. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZNWQ2011048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed767723ecf4b38e7cc444f32e23a6b33ed68c05e315bd7afa925e98fce2f079. 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/QZNWQ2011049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597f08bf07c1703fa1e5185445375bab2d30752579275b27f19cb87e2deebde2. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZNWQ2011050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d8d9f49728729794ea117261fe6e809cb85ca17c72da6c99e6ba3eecea7752. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/QZFYX2293414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa875aace9d4ea4216d4156e1ec3b502b0e8e6018085ce30814bfbbc0ad2027f2. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZFYX2293415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc903a651b7d7612a2fd750f7853401c9963e11bc26203da90a233f308f98bcb5. 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/QZFYX2293416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x759981d49d0cce04a04282d0565d3572374751e70e54fd8542d316a02ffaac35. 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/QZFYX2293418.