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 0x7ca1606c9988cf3b4a4b00be3f6b0275c8016cfad03ba48cafcf8513a037c170. 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/61f9de1b-ed14-46ac-86e6-f79124db1cb1.json and https://artists.proofprofile.net/proofs/artist/61f9de1b-ed14-46ac-86e6-f79124db1cb1.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 0x864da1509f77c51695b184abd4addebf30adc1b8605e217230f89c78b171325b. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZFYX2011160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307534074ec8f5e786c3a104ac8e1f4b9e7cc6f933e20239f4ff359e47de90ad. 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/QZFYX2011162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda2fa4a413f0042c13302c33b55390d3b3c53b8bcaea0b71c9a443beb846079e. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZFZ42009781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda79e1f55645d39ea6f25cf3547b344f9c6a57f2ca5033b70f8985a553074f64. 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/QZK6G2043616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfded503bc6dbad60191768f58f04a846f3b84cda778dc4814c49ec30247fd85a. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZPLR2023904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32d04648c909763937c42671541d1bd454fbfd499c534ce16a292ad786a8543. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T02:23:17Z), 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/QZPLR2023905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c0bedff551bfc12666ce655ca06f33139f326cbaa831c6be00b2eba814f9c1. 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/QZPLR2023906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ca9acb022c4a9b28a9eebc1ac83dc58a2f62f84338278214e35b29001ec7b1. 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/QZPLR2023908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c631105b10661daa5b26687a7894cd788677030e72e730da63699a0f09220d0. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZPLR2023910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff45b246fc30868b32a9b9b977456f612db8a70952f85361c462db2f593c028. 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/QZFYZ2159251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea9e65c3dc19d77c4179de20a5fc78fe03c9907043e5807656616dd135f4206b. 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/QZFZ22174108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a16dbe971659e3fac75da58a9bba96bb0e11485be0073343d7e73c10746b13. 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/QZFZ22174109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb15a8daf00b217cc1f13473b96b4cdb22e06503cd1d55e9cd5f62b708bae689. 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/QZFZ22174110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a67e7a5b51308d84c89112a2638e16830f4dabaecfdd14f351ee198de707af. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:02:06Z), 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/QZFZ22174113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a2e13c1f0b3a7d1d2045912d6cc1dc17ca47936f75f53ebaa2b0df4b5f851c2. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZES82133179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec9218e3510c4fd3b0e9b2c599af580c6db7e0e3f4d2fb4c52c4ff51c3d7008. 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/QZPLS2116486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f731e24c1cc6dc61ea9ba387a077fa8b66aa09e377e6c9f111df6757d7c340b. 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/QZK6Q2277156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae745118612c2558f9cf205580a56dceed7119b5428f74e12fc15ba615d4d01b. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZK6K2221083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d7ee0166c636ba8b01aa2dc39c028254f4e3220939c644bb9bed2b84ce75366. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:59:55Z), 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/QZTAU2250418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02250c33d1944abbe66d66a9e3822cf7145c0248c748417e0fa9027dc4d27645. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:32:47Z), 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/QZTAU2250419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d34ea118e6b9b672bf6a04577fac253526a2d4fe97c48801e31ed6b82e3ce7. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZHN82305072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa129f8d21c30e9f99a8ca2733d0be1ca8d5fceabb97b1df279bf5f366d9319b3. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:48:22Z), 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/QZWFH2489882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0fe129161a4f4e79b7391ea7fbddbea367a27f138db6c772202abe69d79715. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZWFH2489884.