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 0xa11114ef8e9ff945831d850281a397a5ee3526a134f9bb6be1896812f2a1eccc. 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/7722b553-ca22-4819-976e-849c7c546a0b.json and https://artists.proofprofile.net/proofs/artist/7722b553-ca22-4819-976e-849c7c546a0b.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 0x8eef036a5d511b1c5e009d31f9dea72c157433995252488fbd374cf014816397. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNJX2464796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee477b0f3b28115ecce4722b64d705104c8e483162a4d4527dddae01ab75c9bd. 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/USLZJ2558490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e036c78c2f8e9a5a800f3f6b7e28bbcf8bc3220599385c6124df237eab3730. 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/QZZEC2436650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa28c50fd76831963fff85a6278f1c47d10dad7855ffdb1405921b7b996356666. 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/US7VG2570982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe708d2483dd205297c51e0844bad706d5f4381f042350db14b52de068fed9808. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZ5FN2542700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f961ec1630c257163bbdc7a64d6bca91b3ec4c89bece1ec99dee2d11c62f6a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTV32545880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201ce43694b25331e1d899bd40c963ed1c7dcc080200f72b8cf94b4acaaf4fe6. 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/QZTV32571911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7613fab333a9fa9ea3a9440428c3ed5f57ebd6f19b2802b7011645f84c482797. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZWDD2503283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058384f67096401397c8b0a144c41c8a621e5e1974b6ca9fadd381dc64f8f3ef. 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/QZWV32527260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814da7b625e8ca83e4427a61543f93423a7915ffc1172e7951e172fdd77b38e2. 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/QZWV32561211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03587891fefbf527bc33e0414fd8934f89a893afa9a998cebc299b0d51521477. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZZ8A2577805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x100aafe83f2981fdaa8423a39ea78239394b8c0648c655a59065bab704ac43f3. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZZ8B2508799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a468e45c26825b2d7dbd96c6abf894387323c0c2e913add3b0d250f98fa96b4. 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/QZK6P2405044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1e1f9dd0db5abb2690614b3f388d9e0d43891dd6dd2c97c6467116fa0f0078. 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/QZWV32499259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaecf8b247b874df0ea2f0efc9e7b9ea3c0a1576aaa751954768f0bb73a4db6a4. 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/QZZEC2456389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c37d2d48dbba0e9ace8c593be2a102756a03168b6ccc6b63f994956b898f1b8. 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/USLZJ2558515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x248143f6082295b1163c54ffff0c4952feb7d23a1b05d2a0e7e3c217c2366b24. 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/QZTPX2470004.