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 0x2966f68ab18286042e0e85957389d9fa547045ae0730e4fe0fe89da265006a7b. 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/527edf8f-c2aa-4e95-b827-e47f663ac286.json and https://artists.proofprofile.net/proofs/artist/527edf8f-c2aa-4e95-b827-e47f663ac286.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 0x30850396ca0edde54d0a2f678ecae5d72aeccc857329b5055f60421323407248. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BRUXD1600078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d5bb96b792b4d7de1740b8daa37dba3c98d2b53bf5127689bff261ef4005206. 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/BRRGE1702869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x233807349ea6406b2589bbb7e64810172971a5d93ef465a89440f6393af3428c. 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/BRRGE1703587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d5bb96b792b4d7de1740b8daa37dba3c98d2b53bf5127689bff261ef4005206. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BRRGE1702869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eba1624cfa59563ec5d3ffec5185bca26ca6f74643cc097876bceddd11e8e8b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BRRGE1704828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x233807349ea6406b2589bbb7e64810172971a5d93ef465a89440f6393af3428c. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/BRRGE1703587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5cecb857fd292260c0733842a6e14ebf04a0844ea93ed972b3439daa89b152d. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/BRRGE1704826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5cb8cfea4bf38bb51c11718f8841a2383bbc8eb84a4c3fd366692459629ebc. 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/BRRGE1704834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b4947e5a6df411e9c8e82e5a119b926d6d9aba924ff466919a5715b89a234a. 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/BRRGE1702763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd80efb204734d6ea3bd6bfaa2edf3b0fe58aacd9bed7c5dc9b218acb510a6e67. 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/BRRGE1704838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f74e2cdfe5c8664a6bbf0380cf8e4818e8e2724404a8a3ae73d8b75fd93191. 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/BRRGE2002681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd43a4ffc482d08d4d54fd39ebc066e8b00ac15500ebfb490609beb76ff002f03. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/BK4DA2411967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde233d2d0d3c930523f1adc8bc5aff1636d820748e016fb0fe4b81d27dd0b7c. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BXGSW1700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b7bde178b2e76b4eae1bdd6b375243449efe94ffea1f4f549ebb28ec557158. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRUYH1500009.