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 0xe0149097314201225c2507964d828efb9857e509c0be1b4a0e86165088461c61. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f33134b6-b790-4f88-8173-96b12f29f277.json and https://artists.proofprofile.net/proofs/artist/f33134b6-b790-4f88-8173-96b12f29f277.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 0x7b603b4ec36cbb8696b7de24722b0b00d68c780c5012d627b4bf3ff5fded1f7a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USHEL2304001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9469db67957064dc923a57b1877b942f8d482e358f4a177eb73c7db68ce12c3b. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/USHEL2304005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2651013741cff3f7f4c6b05cc4fc4b850a86428a8fac1cb1497590b15953ab2. 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/USHEL2304003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4777ceed657ba65dfad81733b0f00f0ead38f19962a34a1b4d70e92422bfe8ef. 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/USHEL2304004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9469db67957064dc923a57b1877b942f8d482e358f4a177eb73c7db68ce12c3b. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:00:16Z), 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/USHEL2304005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b603b4ec36cbb8696b7de24722b0b00d68c780c5012d627b4bf3ff5fded1f7a. 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/USHEL2304001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a021ecf718dd82b26242bd039ff74bb1b27547d1df2e39445460a5757b69e98. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:51:23Z), 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/USHEL2304006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x986bb6eef2681f4d83d372f233c119b2b181ded1ea79bc987ca51477e9ea4c38. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USHEL2304007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579418f3a78d52bd9b7a0c248f1fa628266da8eaa99a96b7ca561ff41744e9a9. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T07:54:30Z), 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/USHEL2304008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1796d484a93d506ab22daf884ebb46fcede2e8b9bff8ad45b2917529a780385c. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:06:42Z), 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/USHEL2304010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe065a3b9673d0a3bad6777daea657f4eb0fa04c8c7c0b6a1740e706b7060c20d. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T05:02:34Z), 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/USHEL2304011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ae6016af57b9ec86f5e5874ff5215b39cdb8ae074582b500b1bda7bc9e2925. 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/USHEL2304012.