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 0x131ae6a2db3f690c22f2932af2944206b7626b5bb4f744d943dfaf479decf3f1. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ab030d92-cede-440d-b745-72caa935f677.json and https://artists.proofprofile.net/proofs/artist/ab030d92-cede-440d-b745-72caa935f677.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 0x78772f7b7bd8c8429a0e9e693f6dfb2db02f67421f10303f05cb27e5420a09f7. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/DECE72502893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f3c5dba6e2a39d8b757aa3626fa65ab07bfca60bc4d124db41f046d96889e3. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/DECE72502896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ec3251413ed128655a7daad04f8e4f0412f333c80b768d8315a5576ecf8fb5. 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/DECE72502897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x829e784770377050f87a6d0c2726bd1f3b0fad5cc0cdad440df67985ff0bccf6. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:59:06Z), 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/DECE72502889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984a1126740c73af25e1c2ef0b27a833467fe9897a562446130758ef086af81a. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DECE72502894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa646b34f9cf9ea61e1d98e16a0a2bf5b84d7a6440f9a30567dc597f96728cad1. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T19:52:59Z), 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/DECE72502888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x829e784770377050f87a6d0c2726bd1f3b0fad5cc0cdad440df67985ff0bccf6. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/DECE72502889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bbacfeb7e59b3ecbf020a652e3086c449456d9822bef8a462afd0481aaab708. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:22:55Z), 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/DECE72503086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde9db6c4cd98deeccee120dc75bb1251ed483b8490e729a3d516829e1761a573. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:48:40Z), 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/DECE72503089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8512bde0b021b82ae2874449abce7b8cd055c16a5187381899baf3edd7bb394f. 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/DECE72503340.