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 0x3bdf46d008a01212362af8fc39e1f3dfcb12ff468079dda5b40ae9b88c0bee98. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e2173a86-18ca-4dc2-b95a-21ee7a123f1c.json and https://artists.proofprofile.net/proofs/artist/e2173a86-18ca-4dc2-b95a-21ee7a123f1c.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 0xc18b30f1a47e32e2362a8724575a460a02c50058d55bc6b5277d08336dcde40d. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:12:35Z), 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/USCGH2108818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf329272bd97b40d00d6db1b4749cc36a9af6c965d8afc76735807b2f15d7cd1d. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:40:32Z), 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/USCGJ2413179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39527f8d1220268550dfa29ad7e6ef12d288e768e83be8d83e067f647beff62e. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/TCAIM2460804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa032e498b5dfa368ecf768549f741540c6695bf443f537cf40d64f4a93345ead. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCAJH2563692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f27db5e3ef8975ebaa22a972e19327a2d99524409dc9dff0c9a59874335091c. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/TCAJH2563700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c9ad662674d43ec43eb9fd6a2b65dc2a0341665690084cd69a0e6737063307. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/TCAJQ2587308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2834833827fb6ae81e81ab8934167dfbb91b72cb7d87d539cea0f41fb1c3748e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAJR2587322.