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 0x79f430415415167f452ce22431f9faa903853392ddf88e12520f5381f410166b. 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/0f25b4b3-c5a4-4fbd-a5b6-1f6101edd1f2.json and https://artists.proofprofile.net/proofs/artist/0f25b4b3-c5a4-4fbd-a5b6-1f6101edd1f2.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 0x8ca86b199321ddec4668efe37a19529a6c7c1dd05b871a86fb4d881a2c8fc7b7. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:21:52Z), 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/BRYA51700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf840a175d5343284d4cf49e69117bb90685a950472ed69abce3f2ead177bae. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/BRYA51700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa16f93b7c5526f01db84a06d29f4844099e9dc85306e924291f46e1e050ec89a. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/BRYA51700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409d9c21b84f681a9859f0eb7dc3d2c0d8f4997a90552899de6e8d2fd68f330f. 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/BRYA51700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0353794bc487fd3121aed476bf6541a439dfb0030e6884a5514d553a85e5f123. 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/BRYA51900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x604dd3a59c28eedc136b7d56b6e292e68c2a07bdddf195318d94e9128e2c7d46. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:37:47Z), 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/QZGLS2008846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd575d10d1dc273bc7f10c3f6b7305f7ffd4d93d1d20524c230861bf94b35abe1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BRYA52100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e98ce6e532b5562fa439e8f0120727b3a1b987c824da05201fe1bfac1d04e08. 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/BKSRA2400001.