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 0xce57d85527c53676b12743c91eceaa27d7473681ebc2d8c92a881dbdc52dc4ef. 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/beb47d02-c590-4b46-92c9-5f80f65b582f.json and https://artists.proofprofile.net/proofs/artist/beb47d02-c590-4b46-92c9-5f80f65b582f.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 0xdcf545a888ec3ad349b20f186606dcfa8730d2aaf988e58e901895995c958dc0. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZMHK2395777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70dd21d8fa537541883d2d8e500669fcd98b518076f96e3456ac4a5220239264. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:58:18Z), 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/QZS642343062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7445b5687cc540aa1de79a007fc99086a2454901d68a30c7f30d3f292fe1e2. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QM42K2349339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5b44a58e18f7bea5be983c409f7685759301552cc70a5a8c89c220240cb44c. 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/QM42K2398285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86666eb65cd58634927897b9cabcf572d2a62cf3b3d3dd7a43ffb71204f26a6d. 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/QZMHP2338683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb8ab28cc575cadccda555330392127b8e3b329f2fa8735190cfc83df3e2ea3b. 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/QZS642376192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e98a689347187aeb4bc39065c5f1691a4530de638d796d30e3b0ba7ae345a7. 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/QZS642351400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7a72ac0dc1f2195dcd17bad1e8d926c4d872618b66486b62a1309d9cb91f3e. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:34:08Z), 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/QZS642380769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59adaf73e9615da29c3e4d700013dfe77915bd53e3acbb6de78b4a10233263ed. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZMHN2321359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ad1040d558117e64c3bb8c8799bc0f76b2dd1c9f1c205f5388f1db7b814ee4. 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/QZS652324415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94b9fe52adadedbecc4e8f89e8e90726fc39e36e388e4091b8275aef7549ac5. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:11:30Z), 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/QZMHM2339930.