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 0xbe59cad6fa89b332376e82ba76a25ea47058001d4304cfa313c26dca37c3bacd. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7fc04ab1-6b67-4ab7-aef5-4f6581f2bdd8.json and https://artists.proofprofile.net/proofs/artist/7fc04ab1-6b67-4ab7-aef5-4f6581f2bdd8.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 0x65e2dab44b3fb3af86fce4f200cb4f6c3fab1cf7ca17979c6718aac0214ce370. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/ITJ049901152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f31f39e59670f40ba15afe78a1d2d8b37d8fbe4b73863720368eac977ceb364. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/QZS672497735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6552bc5a37f2c1c9dec0f831366da48d959b33e1c262e11731c46ee6b483b3. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:56:09Z), 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/QZS652471037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d719b1af6d781b664e1e1b893805c762f664b1cd47b7375d825549c7894157b. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/MXA3V2409567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f70a52dd58e9c04c9c585ae54a8c3c3ea44fd38cf455b7dc01cfdc4d373bf0. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/MXA3V2409568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8e4317cc286f6d62947021df89313283daa16fdc523e3b145d2b36c6923a8e. 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/MXA3V2410065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4547b1a9907e87c8e0462cd149b0920327647c8dfe72fad51768b17705bb99ee. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/MXA3V2410066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e2f01acaef71bb1176c5aabcfb2bd88a205da64d603f7e032f624e097a37cb. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:09:54Z), 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/MXA3V2413343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d886482599cd4b7ba9c9f8d2df0387358c7da74d480850319ac7a8e290d7358. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/MXA3V2413344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcfa1a02cba25d4a8c8747b6811c67d37d68d2a5fe6d12e5570999a33e28e0af. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/MXA3V2434887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb019a691c81f99f45decbdf739777f677e1a8ff9ca63edb01799f1325781224. 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/CAQOI2529234.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c96333150d0c6d9b14dc5845de2d8414e376e9ffc3969fcb472458212ca9310. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/ITC941001572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c6034fc71715f124af75134bc1c940dafe9fe8eece94f0b655c0613fe4e99c. 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/ITC941600108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c6034fc71715f124af75134bc1c940dafe9fe8eece94f0b655c0613fe4e99c. 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/ITC941600108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe9e14eccaf19e19a8c9f61f68d331ea409941f57e2d8c3404e23096d5d5622. 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/ITC941601865.