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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b6ebc55dd55be8694df44162a74207d591c4e1b1ffbe603b97346ce3873911f. 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/1b9dce1f-fe71-4d8a-89d1-4d1fee90ee15.json and https://artists.proofprofile.net/proofs/artist/1b9dce1f-fe71-4d8a-89d1-4d1fee90ee15.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x900117572bdc3af0fb2a3a55ed8d404bd399baeecaf29982a2d6ea2ede83a242. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QMQNP1200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6239af5cf7e148c35090b6d27fbaefc9d43f6489b90afb231b1a37593848db26. 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/QMQNP1200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b49fe8521ae0ce6142c7c4c9c775e3004a170b74200f2874cff1139cedd5656. 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/QMCKT1600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1804ffe586e47c9ab91c403c3f7456adb44cf5b19c2681000babba71ebcc5fd1. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QMCKT1600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595e8b31c6a5c9f29072766cd75887ef7f56c18d3e8571f96460d8e44bebc956. 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/QMCKT1600014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd14441de93bc93fc4df855660ff06446b4e6f1c97548d6486d14b6e61348348c. 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/QMCKT1600015.
The Revolution, Pt. 2: It's a Long Way Home
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x083eeffb1ba1f8d90fdc3ebc8fc4beda5d33bbc7361bb91acd364f6dd007ea63. Chain 2 (Bitcoin): anchored in block 958678 (2026-07-19T05:59:57Z), 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/QMCKT1600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d52f4a05573723eac4166955dbf3b12087135ab81e4969722285078492fe7e1. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/TCAEK1993920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fdf0d07b4c4ddf01657b2f6426b9eb4e3c0e973320e7d58e34018cfb8db9670. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/USA2P2139616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb06afd95f97aa994ed61f437e08a01bde20243d249d57d77d06ed5291dc186. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USA2P2139618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f94176e086ba477c696da59de07e5ac9cb8bb030d297c811bd23aa5839afaa5. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/USA2P2139617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a208ebffd7c8a4b20c6e2002b4c3eb5160bbe752d89ff3e02632343fadbe587. 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/TCAJG2576386.