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 0x748fd7c5178489cdf06e9d087ee9a01128cb527174f7c8267ee885657429ac49. 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/4913bd4a-ae94-4256-a968-c1fb0abd48e3.json and https://artists.proofprofile.net/proofs/artist/4913bd4a-ae94-4256-a968-c1fb0abd48e3.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 0xf755551af70b81fcd3679592b56c71b780682636aa729a79502ef0e2ae465988. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZZ4J2401541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0577a7dd53716aaffb70ac5543797c130c0cd946d4ab89398730cfc261a09336. 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/QZZ4J2401538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a3729b0471f74f8f93f1d99b3dccb03ec803231d0463702f28fed424a0fac23. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZZ4J2401544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51543929b60506ab27a4f88db17df11c604d040e16032ae2cbe3ff7a275e77dc. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QZZ4J2401543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc843e7061b5d965d69c6b2be7b8e6ec58fcf08f67eb4810bf85ad10e965e4804. 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/QZZ4J2401534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34fbed2dcb1c24b44a5019c0597e5861cda1f3e4bdd2a67c8476c40585cf7290. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZZ4J2401542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24cdf7e14ea40c37b0f948f3f7ae47f52c363c03e4ce83caba09639bc724c6bc. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:40:22Z), 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/QZZ4J2401533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5403312820c5f278a04959aa16fc9998b61d5932ded42696eb3b481c2c5210f7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHN92470851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x922e62f138df34f83d4675ff86ede076a75635f5afdc2b0ef227a16cd06e760e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZZ4J2401535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d929e5b133aff59171465b34cc1b42ebc7b264b798a67c49f7c9602ba04de1. 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/QZTAX2435737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e61d26f2f255d0a36509d6f6138a68107b3a1970508fc7c2d0a3074a91d3888. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZTB32400409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88f7e7d942a5731f8c7575fdb4332d6a5cd5471da987c12a503ae3d5bb4c99f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTB32478151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x503225419303a3b4ffc38ef06ef3294709fceff6e0fe0601a9bc2a2b72ca3edf. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZZ4J2401536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b705194316ae8b968bd37fa5eeeee819fcd141e5c30ddee02db8e6f58c17433. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZZ4J2401829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b705194316ae8b968bd37fa5eeeee819fcd141e5c30ddee02db8e6f58c17433. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ4J2401829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de926c87fb2e3b5f0146870a57d5952d1c55ae973ab58dd9a66bfb06bb70ef6. 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/QZZ4J2502341.