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 0x64530b3a52edf641bfdbfb7510360e3e2afc0d8074380df0d6a12caee3181f14. 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/43a58c98-9b4a-4528-b9a8-e52e0820a706.json and https://artists.proofprofile.net/proofs/artist/43a58c98-9b4a-4528-b9a8-e52e0820a706.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 0x08c84a0c35a24c400a815089200678eaf28c074897d6a008858dfc52b839d11c. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZMEQ2445370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3bede60fcd4a907665839b247d7fbc5ea127999f077ca4c5c337ae9886e35d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZMEQ2460370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d2d5b1a4751868a65138169ef9f2bcde8c411266f74c394a3ed6cd691fca22. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZMEQ2488576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf321137a40f613b1ba0cdeecff1f989c4fad4b86c621de9c26a3cb209866bf1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNWV2447194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x287eaaff5d07becd1f10a909c5a0e2ee74873ee012edfde8e915efba00e2f321. 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/QZTAT2487985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7babda6ff295b50a15857b68fae586fb12b89f9c2f55226ffd46ae126e12e424. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTB82463461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf646062fea387615909388543a5f2cd071508132772aeebde099ef0d73104f91. 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/QZWFN2428109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ff8d2941b5a7476430d305080a5f6f551f78c09320d66689d5f2cbd5e4b208. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZWFN2430953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b57057503dac61bf92140d2516063c2edb549107ae5fc9f3902e50518875d7. 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/QZWFP2444589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc599389fc0096033f05d2c932f4f5704dfa530846f4b468b5e9bb71c236874. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZFZ62531913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x385924f065b582e22f3f76e9621c10704bb4d9c29f29ca48eb669d6d7787735b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZFZ62527662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba7737be652ae89ed2c4c74aa41844b35b113d2ef9c9f4ac430593f6ee87aa2. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZDA72516402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5708deff81293be39f7d95ba33b88787d2288324b42621961d285a8b51e48316. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZDA72507702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6f2bdb87b417248da6a91441909e8c5bb530b9684645fad4e2c3666ea5fb13. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZK6G2529065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0816c0135ffbfae1a9e905606fa3995e3e7c2c18f2807d398b233f97c6b95899. 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/QZK6F2524424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e4c2f203fc8a7d72c24ee5f51647b63e0d73d39f8174d933b6f604810d456e9. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZK6F2526448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b071dffa2c039152e870924d7e87d14fcb80e29d85f669a0a965d71d380329. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZTB82548453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba325008cde31bda0a192f57775b1b797f7a26bc925fb02749840358a0ff18a. 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/QZZ7V2540670.