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 0xf0b9bf77def38ba0e1fd291d4bc05c121bfe7e65f391667b95306005824a6600. 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/edc9563b-9fa4-4ceb-9404-b3a4ae519490.json and https://artists.proofprofile.net/proofs/artist/edc9563b-9fa4-4ceb-9404-b3a4ae519490.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 0x5490d4260078eea675e43d4c5f70722c42b082cdda2de3d03b745e22b7cfe652. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/AEA0D1959857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ffa1823e0dc0be2b94b2bfc896711d2ae978c27d6694f71c7bd3a169b5be0bf. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/AEA0D1977195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab6c29e34f018ae54ed1c1caa9d817c5c7e6d25c36c1c32a11453b69bca949d. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/AEA0D1977198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3830cc5090ef0c271a5ba0b6e4fa361fb575c36f11f4572c903121a48ae3f6e5. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/AEA0Q1913064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4293a9a7cd5aa38ee025108521d7d698e7c30cdb36dfbc7c479d0d6275c8ee5. 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/QZVEM1833433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756592bdff9b5750236cd4aabe282e2a9dd9b3f9ccedd10a0d009183a80effdd. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZVEM1833434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a7f03b067411124732f6fd04818586afa3349e3959c0b90a33a440f1187c63. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZVEM1833377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34aaea2bf69f3635e5eb73f80deb2e88b417f9228ff5f215bed146e270aa6fc9. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZVEM1833537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd56e5535be36c1dc75145470a328a707339624425e12105c26d53fee744da35. 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/QZVEM1833436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d5d8ae6fcb882925327dcdd760f853dd97da473bbf7964818d0cfa678c2143. 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/QZVEM1833438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31a5656e4e4c7c88817d2100dfa6062a243a2fe0cd7a65ecf387ff6b2627dbb. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/QZVEM1831171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232cabe3ce6b399a60242928c466f5f1f9d4544db996cde2932bd2b3cd9e9a43. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZVEM1831172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de02b897aff7f4371f2bf65163cd313baaee26e394b1c43093096a8454736b8. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/QZVEM1831173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105c7c9a434d33036a07db6fa1e77b54f9fd4d3d2641c21bf45ad4e8ded8624f. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZVEM1833638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3ed230fb7e799fe721f4fd43b7dea1f67eb34bccc23c27474843fccba5cdaf. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZVEM1833642.