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 0xc21c45a1cebdf9b70e90eb8928938cca76bdca4e6cbd7579ea2b8cea479a79d2. Chain 2 (Bitcoin): anchored in block 953743 (2026-06-15T04:52:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a26e6190-94d9-4867-9aa3-2d6e2a3ac468.json and https://artists.proofprofile.net/proofs/artist/a26e6190-94d9-4867-9aa3-2d6e2a3ac468.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 0xbbe1d6ccac3e67ad68e28bd20f3dc22bb734bc5d027196c2e9103ae079c09aa4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTB62454853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39263be26d7b07230164ee4ef6563ace744784dd6366abb42e7145986eea7218. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZTB62454854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9037b5ac525ba72024e9d96cb61c0d8c4e5a2240c32636d8529860779cd42b96. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZTB62454857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561e19b5e3b2aa65ed785ad114ff341af750ac1000baa5ac5eb1889555aa0c18. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTB62454860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1bf902c358afe59691a04c98a98f0061d814cf3577bbc38d676b71d32ac8c1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZTB62454861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f20a8fc442d2a7b71f3b2f4fb01dd36cd0549eb871291990fb66e103bbfaac. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZTB62454864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b03d265a62fe6cf6ce2aebc2ec58cc39e6b818d2b84d85079c9102059c7aad. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZTB62454865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec111bc84f9b076f77e9a6e168d40543fd54b9fc4056bcc2ccc5979962c0ba6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTB62454866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2662e71e3e5c2bfb99555c088b570eef45dbafdb3a411d5c768d8e94ca2ddd1e. 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/QZTB62454869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e55cc1322f068c592851ac419fd592d7af7e0be3a9cdd973761f203efd6cfb6. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QZTB62454855.
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 0xac2abf5a41c0ec81d37a2c971c57f68e7f279f783e946126b557bf0a99f0620a. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZTB62454856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc73825f240ea6f243f0eea7f5c412ff6d233d13c26ea72d6c971ea2cfd0df3be. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZTB62454858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb448056973395ebf17d1b74b20642ce714b93c28074c9ed2503562ac1a211f6e. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/QZTB62454859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec351e617eebb52c6bda643b6f0251992ce6f03b235694869f1888164c0d0dbc. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/QZTB62454862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b63f1260893df2f36a61fe4f9174dbebaf81c0d19ada38efa28f50f6599740. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/QZTB62454863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec5b9133efde6fc4449483b359e58d9e87bbe73271b5b59b1e99f3d73a3e9a6b. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZTB62454867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa78573f60aa9bfad63d23c58a80fcf2d44df9d51311d0626237cace897f1a139. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/QZTB62454868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21230f084b399026abb57a262b93ba107eeaad54c3bb7741e2ee00fb3139604d. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZPLR2445561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21230f084b399026abb57a262b93ba107eeaad54c3bb7741e2ee00fb3139604d. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZPLR2445561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef93dba03a4357ef54d34e4921961c8fc57db01f4c1b9405de2e6405fe30dd3. 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/QZPLR2445564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1669ce49d6daf986da5f75da3efc103ae60cfbcfb8c459540eab96abe52009a5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZPLR2445575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db9de11641dafdb27624ba9ac404bd9d46c80589b24fed80f6669e241da6147. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZWFN2573567.