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 0x14e5ef14554ad6634eb04c2bdf30cd432bb58739cd44cf294cf410a71fe80067. 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/c2405d05-5e8c-437d-9792-39e33c9cf26f.json and https://artists.proofprofile.net/proofs/artist/c2405d05-5e8c-437d-9792-39e33c9cf26f.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 0xfd1b65f8717ee4ef6ddcf23c768909bc158a15fe694116de6cf87da59a3fef67. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/TCAGJ2272144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38fedc08fb1af719a318cb031687d5035b4575a3e3f8a1f65aa9a82dc3909ddf. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:37:07Z), 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/TCAEF1957507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb4c0940238ff7c9ab01b72f261f7313a3481638257110ea68863636a08e8a9. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:56:34Z), 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/CAENV2392959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c9a6e017d8ed46eeb88403a131e8d24857ba36ea16a1877c2648025739e2e9. 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/FR59R2307946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204c51ded2875959f8557ba05a3dfe26fa906bbf424a669f75cd79255455821b. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FRX452229794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42e442f10ee8aeafc4e42d0f45b550956e8f88581e7c10fafc8907edd41c147. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:10:37Z), 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/FR59R2307948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21ac83090ae46f40b28148078478c55df6b3197bc3e52926e2922ab08fc0688. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCAHZ2447602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75337054b705f55d8ff34eaed2b163e50df28a9d31f2096212d749e5adbb4292. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/TCAIY2446534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dfcc56d2729081eaf11a904e88ee8e9213824318285fc930d4143044c73f0d2. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:32:55Z), 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/TCAJA2451159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b9e992ef8e83b471bfcc07fc5e3135291e11fb3e1a073cc1e4c17469d11f5d9. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:06:19Z), 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/TCAJC2472519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66abd64cb96b0ada004d16b7eee73ce4051c598aa2431d21a8980c7afba7da61. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCAJX2538971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44838078007f5fdb96749527662ddd51a730e65a85dfb226575c0a834ab8434. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QT6622577306.