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 0x90e40177d9b7778734042db007d3e2116d43f929623f5957273d89defab949ed. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ab72bb8d-b06e-46f8-b6e3-06ef3af47e3f.json and https://artists.proofprofile.net/proofs/artist/ab72bb8d-b06e-46f8-b6e3-06ef3af47e3f.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 0xa25fcf4888ce72c3c5d3521b6ec440afd6b4fa7e51a2da393cfdb63d346d013c. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZHN72593901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15108e28e5a1535d1ba71daf185aa3347085bd10e889a5cd10dca7e51c478dac. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:52:26Z), 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/QZHN82532181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea89ba10a093f81128f1737c4dcbb987149f12b95ad3f33054024e321f09587. 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/QZHNB2532081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94b68632cb112119c5ced9154206a39ba0024fe9f072012358a05bc73ba2387. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZK6J2542967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66686995aa798ccdd478e3410eb32871d64e5e102e81b661cd84f7c6814a6dbf. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:34:21Z), 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/QZK6Q2559899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c78631a094aff4cf2535475809a603f9df18aba8a20452a4d3dc68f949e7657. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNWX2588566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0418cfdcb4259fe9318eef558ee043e7ef9fb2bc16ce1666c240adb75d92c5de. 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/QZTAS2583519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4742722c96d8bf9c64f2457e1de4d247e79b30eb500e5f0dc4f317f053a45c4. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZTB92536089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31bb406ed75944ab0f29a193f13a3ea25fd1ffc5377b0bef14bd973aa5e22a2a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZTB92588033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e672afa65108a3eb40e1ba205eadf1b5d8c72f51021ba6c5c9edfe214aae296. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:08:02Z), 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/QT6E72577951.