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 0x9dcf9419ebccf38cbd5a961aa6bb917370e8d7fdff70ca95638364453b2f71bf. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dc1613b8-0c1f-4c49-b3bb-0521c3cb8f3a.json and https://artists.proofprofile.net/proofs/artist/dc1613b8-0c1f-4c49-b3bb-0521c3cb8f3a.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 0xadb81e3b6c3c93f1a10ede9b55e03f4b2efc48fda853508bcfdbb1b97a152e64. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:04:27Z), 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/QZNWS2390323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b826311a716c7ed3ea8f628a90ef0034f398d7e4716f70f7f56d7a52c96ef0a. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QZWFP2316187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b826311a716c7ed3ea8f628a90ef0034f398d7e4716f70f7f56d7a52c96ef0a. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:02:41Z), 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/QZWFP2316187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ccf604761a31c6adc58b9b3a3c5f89c6d93fed68cefe3890f53d240dfa8a89. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:25:11Z), 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/QZFZ42474253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d95900d721612ee4762553bb99b8397ce4c4bba830509617744e5c4aefd740. 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/QZFZ42474254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2f58b377b6ee00e02b19d0830164ab3c63e1dfbe0649390af697c5b5914f2e. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/QZFZ42474255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d2450c79a5111700e1b0b23bb2c323f87923c14d28edf50642add47772205b. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/US38Y2543244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd8b37920f043af09dd8ae97e49db951a3db1f4092fed44c58f8334a97d8f98. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/US38Y2533791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3016988ebe08c145b27cfcea00759beec25e77d527a239f29716730db03c3d41. 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/US38Y2546583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d2450c79a5111700e1b0b23bb2c323f87923c14d28edf50642add47772205b. 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/US38Y2543244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03acd749edef85387b0744647cabe2282d56e56ef1df0bfd7cee97599dc6af64. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/US38Y2546584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9426b57fc037e9cd9593d68abfabbf90e99f8a0f01b38a2492d573b45648bec. 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/US38Y2546585.