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 0x2829c16d3dfd3636921590a58159534d77f28fff2940357ba99eb17e166896c7. 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/82a79d6a-4471-442e-a642-f4d0525d30ea.json and https://artists.proofprofile.net/proofs/artist/82a79d6a-4471-442e-a642-f4d0525d30ea.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 0xa766cc609f0987620402c27d23e46bce9397db9c6f1a4097d9f26c2fac90e0b1. 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/QM42K2232831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e142f9283b78b21f0975282d39945f292e73a73c1fec0f345b565d6aacce22. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZKDK2239093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f814a1fee5fe529bfa44d62d0ccc2f8a03ff0be20473924017cfebfb0c5bc3. 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/QM42K2271385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0636294d465a05f053c355f7ade675a504daa366dfc7dd01d972d4bd5f797511. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QM42K2278606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1e59c18d5336fbe046c23f7d5612c81eada6550b66c60036fc2398db623441. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZNWY2307215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37782f88cf012f7393a91439a2309b7a8583f9e295b8ca7a052af02a8d29ef7e. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZTBF2496037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75f9220695a5e00b9907d68e30e68ad9cb3b9cf93e69568b2395705b70cb414. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:48:43Z), 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/QZTBF2496042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacaeec5bd76fc1a6b6fa253367e525cb9987c9b74bfa4aa41feda81ec351ccb9. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/QZTBF2496041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f63ec22dc0dd1d30dc91f0c7ae1164be81ac8c404736f56891140d1dd21c2c. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:02:32Z), 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/QZTBF2496038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7aa03017c65312a365a0a3f20dcbd46c125b0f629a6b0298b9be042fb99d09. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:58:23Z), 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/QZWFH2450348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b3602e98b7324bf67e084af561e656274bc9dcae647522f8db3f08d1e6eff6. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZTBF2496040.