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 0x8fdc287325464717763dfa711cfe70c9b9129be60db34df4a07247dc698eae3e. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bfcbee2a-8334-4131-bbc7-41ef8caf2c30.json and https://artists.proofprofile.net/proofs/artist/bfcbee2a-8334-4131-bbc7-41ef8caf2c30.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 0x46541b17ffc9d6c0594ad3eb77cb3bfbcfa38e59566a45ed5865e204d2574de7. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DKBV70402901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc3555b591d3b948b902afa711a45652d06446ff7b00e9d9f798eff4bbd0f51. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/DKBV70402902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11049f854b03ca4eb81c78fbe48e0448b6535a5ce019aaf4835d0173759da25e. 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/DKBV70402903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2469c6eb116666581e7da83af360ca7eb136884fd31c34f6688361c69a871606. 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/DKUM72100452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c6d4571a2988207b2b0c7f0b50d93987592022259c33188a2e500398a2a6e0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DKBV70402905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f912eabc20573b8f705ba01e6997e7c01b39667ebde535e0a6a28fe6eba5445. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DKBV70402906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fdeb18ca126ea47a62c40df6b9162f7fa13e588251d3e17c74d177230e116bf. 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/DKBV70402907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f6b125f5121083b7fe14c4f01538aa95145ad311d62bd5ba638c12a27e7385. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DKBV70402908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc61066d32396997fa1011b79d9f5827f3574d4dbdfbef3d8d8cde613d591a35. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DKBV70402909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2beb864829f654b1bb1a36434b145ae3097b016e360d8b70a54e60be2f439c10. 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/DKBV70402910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f4e6a876043e535cadf0a5f9232ad3ba8ba3248fdb0882dac6195e55869ad8. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/DKBV70402911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd3da6f054b66990258b51327ab6aa9b1d05e99525b681731d9d2d361535b8e. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DKBV70402912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dbf57db381a501610a692b42a5a3df8505a7708f6763817e94fb3d2bfcde516. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DKBV70402913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54622b89a0614542f1c30440b2e7871c9f4d8c3b6632852fd5d9f18f84545809. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/DKBV70402914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f70c5939b07faf8f8ee24d0a51b07aa3f2738cdcaeb34dece20deb2a50ee53. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DKABA1200561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe213d690ddf5c8ae1813b409764be0f2e3f462aa738080ceededf4f12e1316a. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/DKBV70402904.