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 0x73a4317055bb6febe0f4edcd9540061186e6ed934d93c22a7a053debca8a38e0. 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/92705c03-6ea7-4649-8011-a2d05362412a.json and https://artists.proofprofile.net/proofs/artist/92705c03-6ea7-4649-8011-a2d05362412a.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 0x0acc1685320e393d544df1f99ce32c5a54afffb093e006123d0931eae2a31f83. 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/QZTAX2494371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9147620916055641eeec506bfad875de64e6f2f1324a22795854b1a215fa2f75. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZTB22434319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbca32553d9c7928a4b23f751236b63cac254ac93e73d8174b3b26787cac818f. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZTB22434320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21aacfa23307633a9868fba2b90d59b8a1735294a71f74a52ad39efbef08a0d4. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/QZWFM2425676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9645848a381c7427b92fbdaddbab05fc3413178d949cd2370144333b94f5a3. 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/QZWFM2425679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x559b15e5c57dbc2e09e55914d790e932d8dde8c33e0a03fe0259686ac1b895f9. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:01:55Z), 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/QZWFL2490507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a023172e501ba7bad692c7f1cfdba0da64d736ab5e62e6ca2e0554aab586fe. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZWFL2490508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d495a4c4928227feda36773086c382a1159e0c2ac22dfa85b4e5fe63cf5f22e. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZFYZ2586062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5131b5f6eaef10760df7e5b684b0c0956d3c390c082793de55d8c647c4ef3e75. 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/QZFYZ2586060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0331ee97b63cb3be3c5499c04f589a376e817d1d8d641e141fd69bb19f984946. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZFYZ2586064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc355a703655dda16d6bf13aff6b05080cd3c24c551888b56418ed632fddcfc4a. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T01:59:54Z), 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/QZFZ62525108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07893de2efa9115b16efe0602e5fa317ff2d8bbeb482fca65712e31a1b0df56. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZFZ62525110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5799ad9797b9294698f35ed3063e11097e831065a0a2dd2f5beba77076131c99. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T15:27:36Z), 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/QZZ7U2482997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd742e78a4475e87494e7f0d9ae4b7c2ad05b92a5b8cd0fc3ca75a9706fb171. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZZ7U2483000.