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 0x38f0407d2ccb2e71f5c01d922d96d7fc160c5b3369961655c1dd5337f3ec6a2e. Chain 2 (Bitcoin): anchored in block 953616 (2026-06-14T08:58:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/180b7383-2a55-441f-91a4-6a83bd5993dd.json and https://artists.proofprofile.net/proofs/artist/180b7383-2a55-441f-91a4-6a83bd5993dd.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 0xb513ced237385705deb4c9600c944a423688b9d472c7353a7ed4047a4ef6b594. 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/QZTVM2495255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ecd1e617c2e6c90be5f1ee63a78a80b402db43d8c8a88d38fc302a9fbed7764. 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/QZTVM2495256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe68c5b41d73376a89b0b4b2cf6cddee4a2a2dccde9940e3d2bf81aa5270456. 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/QZNJY2446512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe68c5b41d73376a89b0b4b2cf6cddee4a2a2dccde9940e3d2bf81aa5270456. 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/QZNJY2446512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68fb5153599159a66b47ec89a456e3bbd1cf1c8f53b7198260daeb24464380af. 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/QZES82393571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d972ad3a34cdd2433a1062c68617524f73b5be15ec41a85025b4a5ba4f2e050. 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/QZES82393572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e79e9b22988a74822b5ac49003f17cfae6a85cff1ddafdc114c01e9d60a30a. 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/QZES82393573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c54478c4e37f47d5f585396a20632eb350510cfef8f68e446a09b396b80281d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZPLS2202218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb09c866071460cfedf0a82dfb80ae194d3ba77095f6870d125d7b4d7b14941fc. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QT2VB2454523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a74dcda5ddd69696d114de8b3dcf408710a58aa15ef56a9aadac10bb76b9e0. 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/QT2VB2428406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6944c5ae06df408d83ba0d7b094eb5deaf300eb11e869f171e7fed46b7681f91. 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/QT2VB2454524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1703bf0f90189605c2de4c10bcf253a4fac90ecd5831283b741168a70f5458f6. 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/QT2VB2454525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc036ac3daf7b8e1588bb2cce12966b121cfb74abc7299d53c210d5e3b9a3f421. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QT2VB2454526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45077c9229e345375259102ac97f9469bd48c65a7f3219ad6b4e910019cbd008. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QT2VB2454527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e32c165d14780a4f23e474996347edaac2a9f699a0c92064870bf07a2fb15d. 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/QT2VB2454528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351c7f311554f00f2cdba854252a8530a4450091c9ab3105f2143548714dc1f1. 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/QT2VB2454530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3463ed30af2cd2650f30883727c8915b7879bd7802f2a5134dc37bf992babc3f. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZ2GW2400160.