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 0x7828e46ddda0cd0ccc5123a353dc196c3ef0238cd8ba6fd3f271a1ba4aa0614a. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/19b666eb-7d5b-41bf-970a-9417d0e4b694.json and https://artists.proofprofile.net/proofs/artist/19b666eb-7d5b-41bf-970a-9417d0e4b694.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 0x5c482798943e282d8558d4e9ca71c1586ce20a54f311453ab1c7aa2ee031048c. 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/QZHN72424625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b7ee6d910fc91f443f374e60b4db68f4d977315ffc5e0c6343186033246dd7. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZHN72424611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b938ea4489c379b66bf947e5e7b7d03741c000c558dc0cf2915e7528d84e882. 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/QZHN62457643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77894f2d2e419e31b27d143e8c98b00631291b45a5dc77513339f0c9dfad7b4a. 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/QZTAW2367182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89cfaa53c4b3c9856e5bf82f1674abf18570077cb2516d8d87c4a16c5c3a4233. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZES72352572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a80ff90a58ab0c76b99972386ba1dccecd24ee699549d3ca485ccf74437c15. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZK6F2375524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb125cf3f583ef2ea4bc5f65d05005ee26c68970e332c809c6d97807bd5ac7755. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZK6F2375525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312c52c155dc9c84379782decb66fcb32c1c48dc7b55ddf5bec6e4fe84b47908. 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/QZTB22216233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a80ff90a58ab0c76b99972386ba1dccecd24ee699549d3ca485ccf74437c15. 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/QZK6F2375524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89cfaa53c4b3c9856e5bf82f1674abf18570077cb2516d8d87c4a16c5c3a4233. 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/QZES72352572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312c52c155dc9c84379782decb66fcb32c1c48dc7b55ddf5bec6e4fe84b47908. 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/QZTB22216233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7796c402862abfcb8499334c550c10bef71c0be753c0e0731e81aab366b0a34. 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/QZES72245073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2cc1757cf7f6e95470e4dc0b9bcdf1bc4d123e47a97116ca7562efb178083a. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZK6F2181104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4eedeb0cf37a219fff1359b410255ba8c3b50924d52d0ed4b9aa832255029ec. 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/QZDA52414171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e9af0a6e9ed16ddd85b140e4fa1ffd253d320fc087fb7edfc1700e143961318. 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/QZK6N2334861.