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 0xeea4e59a1cce92d6ef8ef425beb909984dbecefa26560c39bfea486034075d3a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3f0833ca-c72e-48b9-9446-6f6b85c183d3.json and https://artists.proofprofile.net/proofs/artist/3f0833ca-c72e-48b9-9446-6f6b85c183d3.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 0x7943f81407cbb4fef48253789307065fe779d5a6bcf9d8054c9d285115184ab6. 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/QZHZD1953302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3259a65de2a21540d2b3a09ce8c7581a2ba2f290c2c33dfbec94957922da44c0. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:40:49Z), 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/QZHZD1953303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03e5deb2518bcb4c04f9631abf65290832184e87846532825b48d0af16cd6c1. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:09:09Z), 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/QZHZD1953304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7feab530d00148b2b3547877685dd50fa3775b4579dfbeeba3abce592f369ae1. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZJRB1971388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdbf2d832c62cfa4de12fdae53f5aae08cc07f87548d38a011006cc910eff467. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZHZD1953342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4efce0ea687a3e363a41e845700ae55538328b87ced282729cb924e2e21cebf9. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:23:31Z), 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/QZKDK2062696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6c42e9acb78bde5aa768836c0358e5f07dd6930f23ae052c3346f516964a2a. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:07:04Z), 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/QZKDK2014781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb893132a91272db0fdf7e85affb257624c08d88c95edb9a127699c249d3eb9e. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZKDK2027809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99f54ed87d932316ba2e086476cce919b35bf429af1f217a26add2c5c9bcc28. 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/QZKDK2008745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7376990f4bae78ae21f0f2091c68d7c426afe2e9437aeceec2ed01df85cff870. 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/QZKDK2007392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a70a06642153511fea6014e8ba753ce4e6b7473d3568175f50ee1dffd38603. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:35:44Z), 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/QZKDK2040908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x098241e72dbc48795def3a81083f1cd5b73d42530162370d40f256e387a36618. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:09:54Z), 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/QZJRB2118545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88f973e3ddf5a9853613e39e1db01bd0ff52ab65e11fac68ee79195a1d9cbf49. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZJRC2162753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d60f0df844907f3d3b538d3f09a304e1d209414683ae97e57a9e86d6ca87eb4. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZJRC2066145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec4dc32d3a95808671052dbd08902be0941e8eae4aa80c0de7217e50b47089b. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZHZD2095249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7007d9be249482b939a0907819d1d018a7bf19c0adea622f238a9bb475babbfe. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QM8DG2141057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4498403789778dd4f8640f88d69eb6d6265cdbb8f51fe09bad185e48ffb57b. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZHPJ2101191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331ba4cca12bd4918f4325eeabeb62685e830592fc057eebee1d52f48ee2212c. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:45:59Z), 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/QZFP52437946.