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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130d702ce5dc7d5d8cf745fe953334915f23e71c28896e28f90dfcc4eb179dc1. 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/1015950e-f925-4c33-a8a9-32564d7c8c1e.json and https://artists.proofprofile.net/proofs/artist/1015950e-f925-4c33-a8a9-32564d7c8c1e.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cdeb47569bd971c4ce7182fa224f697f9d5cc8be18e77160e0c7de0cee09d22. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/SEYOK2014936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa812dbff519149a2feadca18422cbd711cd9ebf3e6f5941e2635abe494219053. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/SEYOK2104356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353639eb4319df1aceed38b42c296256fcd87bea9f94e77ff93a88279f1441ff. 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/SEYOK2213761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde7fdd15e2425a853fb53d15aee364a075918d46abc63e36b2a8cd24027841a2. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/SEYOK2144102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01af411348de145fc05669c3116bb5831a6647fffa70ab3fd5a6b36552712c65. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/SEYOK2213763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f64374557eb39ce5f8e567adedafcb01c5213044c5e441d3ce1c063caa1677f. 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/SEYOK2213764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f5370ae3543dae2c5e7e70c8c14353c185bd091d883d559d2ff0a4711c6798. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/SEYOK2213767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca35f4932a571aed31a30888415d334fa2cc3acc5f99383b35e4007a04de0406. 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/SEYOK2048480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f64374557eb39ce5f8e567adedafcb01c5213044c5e441d3ce1c063caa1677f. 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/SEYOK2213764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f5370ae3543dae2c5e7e70c8c14353c185bd091d883d559d2ff0a4711c6798. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/SEYOK2213767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa754eb8343b786c26ea26521bef0d810a3b4b120cfbe7ff8d046e6a1531ab495. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/SEYOK2227435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0eb0b878807863e1b98c1b2fc90ac7b980e70bffcc0f416d0c10e5f6629eef. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/SEYOK2324446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ee6a967ed3245ea7ea6597f5908fa68fa1fa24a849cd53dae996d25ebac04d. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/SEYOK2338316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ee6a967ed3245ea7ea6597f5908fa68fa1fa24a849cd53dae996d25ebac04d. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/SEYOK2338316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdbfd381d358e183894c8cbf6750420a3fb49c379f3591a837c555b627157be8. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/SEYOK2418245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdbfd381d358e183894c8cbf6750420a3fb49c379f3591a837c555b627157be8. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/SEYOK2418245.