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 0x79cb83c5a547ef6897d9faf8414730af5e3069d758d27fcd2d0a2fa74fa14899. Chain 2 (Bitcoin): anchored in block 954647 (2026-06-21T04:36:58Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d75d0679-6f01-4a09-a46e-5e40f81dd416.json and https://artists.proofprofile.net/proofs/artist/d75d0679-6f01-4a09-a46e-5e40f81dd416.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 0xfeef3d9d3e686f1ca486efcfede796fbffaf3b677dac001398197aff6fcdc50d. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/TCAJK2573683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4da0f0a7e4496451bcc8b8effa15cd2f5c2241705960a44384163e62151d41f. 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/TCAJM2557257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1215863147792426d2646eb863f5e5ae60cba582980c60df7133f221e6e450c2. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/TCAJM2557141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5fc1963c89fe930b1cc87b3f20a70365e01814ec5fddb91115515dfeb762717. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/TCAJL2557178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f24c95a7062615fb37b86da399068db3759a7547381eefdd6c43efa49958cc. 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/TCAJL2574593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf00a62d4fb84786b9ccec2311706214ecd4c9c363a56377d2b143d57316e15. 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/TCAJL2575929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88bfe1d6e92827385903a5bd5b4b0ddcd4a82241f1ec47bc048f4928bc86a3f. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:07:55Z), 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/TCAJL2576487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b2b151d11aee8b7d87fafaa07112510917878bb35b06ba497425340c23c4a3. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/TCAJL2577349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438bb12ff2d9d24873bc3d4042d69986e357507c09e4b227315b9d21d25a0d75. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAJO2505444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e1608ae53d582f0354ce6eb4121f8bf31d2f41479a4ec956c1b246e5d12825. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:04:12Z), 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/TCAJO2531886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c515aa80bd908445fe84b77f0ae25662e2870f241dacf8434a87a0003b4f0b. 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/QT65W2501099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7fdb00d3d8a162a44017309b69011bfa2276384644214baa9d654559312391. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:29:34Z), 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/QT65W2553869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3584c550af485edfb783ae3d0e23f35807cc98674fec35e8be685438a18df4. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QT65W2588973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc108b0ad75b7922b1b45f4bba668dfe9604134466eaf9ee7afffd4c58fdda5af. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QT65Y2553727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c3fd92ff9f5c357bb1e51b07b712b07401a8e736c454462b1a50e99f59176f. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QT65Y2567383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7975e1d0b2c75a081153f94d80930784f7718e7eb1c507834e43a967666d9ed4. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QT65Y2566088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91ff62d8d49acb67ba9443633c2931180a26af2f8edb235f20c279038047a8c. 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/QT65Y2574217.