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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c63cdfd86b5525479f826fc4dc7ca14a633a5015cbb4240902c60e28d3da8e. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6f84e026-8cde-4fbe-b5e7-212095238431.json and https://artists.proofprofile.net/proofs/artist/6f84e026-8cde-4fbe-b5e7-212095238431.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d0b022d577714b0d344383cdfed6ad832a24a4f9f182e80037b7039aa5565e. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/FIMWT1500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c109f8d950016f570c6e7a09d908bb5aed26632b710aef2d8ef1e83adfa2ed. 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/FIMWT1500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48fc251aa506ab796df4446c8996fc13b6849955be29b060d32ce3e233f83433. 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/FIMWT1500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69bd6987674deb47c13843e63e07663a06ac220a246721768f3e5b07dc64265f. 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/FIMWT1500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40bab52ca05ba61f6466d2002844b36e566b65c418028d27709631696e8288f6. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/FIMWT1500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa383cf31cc7f3ea0f28a303a330072ecdfa522955093bfa7644cc7a12ae02891. 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/FIMWT1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9766f104a659ad4d91a6b4450b2f245be672dad8cd782afe4d1ecddd274c8c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FIMWT1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x356f89846005782ad104cecdfefb7201cbb40b4cbde95ec4ab8a18be92f2787e. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/FIMWT1900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de3e992d884b136f4598e79fe5f2cad4a934155c8aff036a33d8bff2409e187. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/FIMWT2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3fa47aa902c5db8bd6ea13365f66d531f98410b1ee881f6b2a422ce3b73bcd3. 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/FIMWT2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc9363cd4071feaceae358546b6028a10c69afea55e8034a1c7e951b06c7dbeb. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/FIMWT2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4479f5513645b33384c6adb0d90000717791ec955f62debe60abeaafb0c80c2. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/FIMWT2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eadf4ad98dc551565bc3ddd45637992abd966e87d654443c8dff63029cf8cef. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T02:33:54Z), 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/FIMWT2000017.