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 0xf3b7f292825fe9e7c9e03df400062fe3dc212cc35ec8a63ae19720c0e24c83f5. 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/89cae1b1-642f-4012-be04-2f9d0e5dc102.json and https://artists.proofprofile.net/proofs/artist/89cae1b1-642f-4012-be04-2f9d0e5dc102.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 0xe4477ba7e773906b79aac4d032ada673c9c1bee94b9d6cc1defd09a674c62516. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/US6GH2016101.
Herz und Mund und Tat und Leben, BWV 147, Pt. 2: No. 10, Jesus bleibet meine Freude (Arr. J. Hume for Solo Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0326c93c2ad92e2b1a93997df69789ce01bc54df886093e6556140caeaaf2a6. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/US6GH2016106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2a5de67647780c5bc112371753dbbdccf1abbc65c5c36830042f7d405d9e07. 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/QZK6H2132583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa812d96553e2dd41db835e437854d301ded2b08d6509b9b2fb3be3a7a085dfad. 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/QZRP42101350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf3729b54e41296b4c3fa3dbd602ae4c543971a80c89de4b0ab299d649c8db71. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T01:22:54Z), 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/QZHN62248559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff9f9cccede8fe5573cef8bf30e660c5a1f6023d5aa18169e75e0370cef9f8c. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/QZMER2237347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0d804da41393d12aefbcae904b607029a5d0c645df734ea0e7273ed6d56234. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/QZFZ22338946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc549a4489542fbceb7bea4bcc4b668c366f4581adcfccf8b88eda9bc2521ba62. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:05:45Z), 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/QZDA72372701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9e8093141dc9fa0a71ab8c81f0c78c48bebbda3803ab9644589fdd6165a83a. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZMEN2331355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31cad1d6552cac43fa21dc21ffec8c760a31a53fe8d32537ac5cdc85b755a8e9. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/QZWFS2323848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0085e47bbc1d4b2d86a608e3863bfcdb0e1c80a4014c4d069b6a2f809f7802. 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/QZHN92406639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494dba4fde5dd9e8111e2401198708e57eaed391ec401587316222134d125fc5. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/QZNWQ2473339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98825d2ed3cccde67e3ccf998be4151806927412afb1d1812aca10b940df042d. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZRP42479550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bdd52208339957cbba921d79c82721c41b3119b0ea9bf5d37ca75bb6954e189. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/QZWFE2479622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb40874ea17d5b9eb9f610376322bfda62c2944bdbfccb16e7d819a562ca4d0. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZFYY2522245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a03f79f54b178ad43e35fb9720dc6ccea2acddbd5c9edb751b9a89af83445c. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:05:51Z), 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/QZZ7N2481148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ac3b3a94f8cfef1741ced07b0ef8e648081dbadc0e680bd1bb8b0710b0b292. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QT3F22495301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb36b8900a45fc8c49b4b111c24fa1943fd176c8aa0b7a2462ca1e1a3db9c55b9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES8741925114.