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 0x2f6925817722312de1189cffab0e1ced976d5b4c703b554a6d81f21b161c3037. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/19876ccf-6655-44da-bee5-ef02e0dda119.json and https://artists.proofprofile.net/proofs/artist/19876ccf-6655-44da-bee5-ef02e0dda119.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 0x39c82ab4b472f186aabdf309fde1ec071efdae605971fa33e9d4e495db4894db. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QT3EZ2403645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa289b40ba5707d37e15a7834adf29d22d71be137dbd1308846c82d018534dd49. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USHM22042748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c897ad328ddff56300bf18ef074dffbaabccface37a081709aa138f7f4dfbf. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QT3EZ2421163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0713b9ee49e9b884e9303cd25d1beae05f873686fc99378b48f30977f060286. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZZ7T2413326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb650a71f6a846d94ac1ed95b492907dc7e7447d8eb15336c404dda5658e85d7. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZZ7T2413328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232d55b7149ce92e612511cc47558cdd3623f1b3ad427ba08ead586d999c7715. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZZ7Q2479901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d27f7480dba7b5b92c6c1d70838fedfe5a3d95eccb70714fe1e29ce43f83aa. 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/QZZ7Q2479902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbf08cb375929099f795c759aeaa9c18b37381c711f058e21d0bde582956b6d3. 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/QZZ7Q2479903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf59ee48a208352fbbde208853c1248f8f5e8c1d26f3c95b896e1e9efde9c2a. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:15:00Z), 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/QZZ7Q2479905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b52bf811789c088b1ee568e4753fa90d4f65d0c6ddf83513d0be84ac36d27e5. 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/QZZ7Q2483238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b4521919691294bf50c9cbebabd0444acc839b9b17dec8cbb46b923ed739c6. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZZ7Q2483239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1368d86a0dd5ef3c79be1af5a2cdcb206b188e40f22d14ceb1e206381e9c518. Chain 2 (Bitcoin): anchored in block 957596 (2026-07-11T18:43:56Z), 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/QZFZ22597755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffda517058d0c2f3023afb682f52df92019301cd630c66130ea38e75fa514b53. 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/QZFZ32501041.