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 0xa2c18b8f5c1850155d5a14f4da2ff7bb53720c9f1aa113b87a2cb3defca78bfc. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/95959550-8697-4a3b-aaa9-d6fdda6774db.json and https://artists.proofprofile.net/proofs/artist/95959550-8697-4a3b-aaa9-d6fdda6774db.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 0x71fab9863ffad7921c14519f93c2450950f415d3658ded841f3d125351acbd49. 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/USDHM1608572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe432110e9fbe21cae28a13d659a8ad4b9fb570582e341eddf0d79d8caa62f46b. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:07:22Z), 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/USDHM1708633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7911190fa25bf8c54cae60713b74b9bb16055c1fba11d838c5e00d70ffdc985. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USDHM1708635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fbcfd6e2367f575b4261283503ec12a5ff57f5b290177b235670d787a563ae6. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/USDHM1810091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6546f6b31322eb8202dd50118052c886bd4c63c3cde36cb6f735f5481dece096. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USDHM1810092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66215cb06273b21040d8b0c2e5bdbbfd8e15792357d79798163b347f10d7902d. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:24:29Z), 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/USDHM1810093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd8696688872af9a79bcf2a83980bf7b220a980ea5093a3c000cd264529bed5. 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/USDHM1910973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a6907377e655e2b22b091400277e3f62ec4395a6c34e116bd55556aa51345b. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/USDHM1910975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1abaae7d1149868fa4775ebe7e9bda94f0cf9ed0513e6fa2aa2bc539d9cf5014. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:33:15Z), 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/USDHM1910976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34e2f2fc2feeea8956095aa07608b193f2d7ef834a8a334a15b0e9a9da607e0. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:23:49Z), 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/USDHM2018692.