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 0xf4609cbcff6b0241c1610afe566ccfb6db6c475c560372a9ef33874d8d12af0f. 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/9fb879cd-02b4-4f6f-ad71-6a53e02b318f.json and https://artists.proofprofile.net/proofs/artist/9fb879cd-02b4-4f6f-ad71-6a53e02b318f.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 0xfe5dd82796116ecbae6c7d2b8993a2249782786051f8ee73c643f07890b9ed1d. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZHNA2162337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569639dc33615f8722ac6cee8c426085c37d7d927b3593faa2b1ed42ed6b05d6. 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/QZNWR2193231.
El misteri de qui matà el nostre amor (?)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2d3a4c15f5245e3d0c34188f6eb37fb4c4c472f077526b050007fc25e56565. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZRP52203451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452c35ff0035a63fc10fe60d9b5733d4e8406db4705f78e0bb0f3953c3217e42. 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/QZK6P2265826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d79f6761b997174e2a26d31e241169144569e5f638a416e6f318757e8d7119. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:13:17Z), 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/QZMEQ2363098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da0fb6d02766db5c71de353f9f6a92427b11f4c1a6241cec57fd8357cca6dd9. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTAX2317085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a8e68b28f89aaf73465f3db7322dd6de26e4efc28b6c24dead5ea2accc495d. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZDA82450846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88c34f38383b6919700589eaa45148dfbd2d94d417e8769f0cdaec60057c006. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZHNC2444860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b753320bdfe84c9f04a0fe85e3c9f70a6b4959a71014b34ac677ee4b374dce. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:38:49Z), 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/QZRP42460796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d229dea91e3fc0fd646a4feb33be8dad04953a2ba4a822ea0702e7e6b2a3b9. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/QZZ7V2432120.