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 0x3fdaed222bbee6de7c8b57cf6ca0317bd4ed9f657f03b509b60c0d656c09dd9b. 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/57847d3c-c659-42fd-a85f-0dac02fcec41.json and https://artists.proofprofile.net/proofs/artist/57847d3c-c659-42fd-a85f-0dac02fcec41.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 0x9337b05e4a97ecff0f00bcc7d1252060db6b51559e5dcf22e39671b6aa5b8258. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHN52233279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9567e036625d94170a133180180962c388c8821d342032dae75389ac9e094b03. 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/QZTB92262947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819949f10cfef7db9e14b0c77ab6529fe52216611087e2495f0a4c3e69b4762c. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:29:20Z), 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/QZDA62363199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965f3987a1f650abc4091b7bae7f0139a7153c96cc8e1be015efa98ba1613a57. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZPLS2349589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa813b4ae04839db5535fedfa7f81f205131156174177bc27bf136e06ef1216d0. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZFZ22421433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4c8239dbc3438cdd01d8caac466900905948917959622da873905e98aaa09c6. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:03:07Z), 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/QZFZ72433416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa839ea94751caf6557a9a8a091b4cbb399012405b63bc95ccd52932649486e3b. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZK6M2455255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9fd64dfa53969e2e3e8e8fb79f743ef677d5f20795567fd3be8a675a34fc992. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZK6K2483307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9499644ca5ead3aeb9613793779c7b06eb32bb1ec4d0f245fd8cb1350406eea1. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:07:40Z), 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/QZTB82452183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7142b9a80456ea01b34d938718072e9c4c8b2129ce3e1fb00cbd5939d053a826. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ES75E2411857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c37b43ba1f9298e1d832a4324dfdb71b7d569d6b2155241929a2cd5514f5396. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZZ772449417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa16cc1e2770d9288b56e05b0aa192447508100edb1de10f85f4dba5926e0b3d8. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZFYZ2508383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ebc44749e9f1906de2d19e62258da18bab45cdd58812af67aa52e9f387bbdb. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZK6K2565256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2a34e8f550526a1c5da1aa4f6f629ae10b876bd0677997a4cd077a1bb1fe388. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZNWV2502391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494950fad128e0da0c8b55b7b3d904e0308888d37d552b3f5f7458e67f48b0e6. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/ES75E2511875.