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 0x3f3e70a7d3798496a7cecb36e6fc9acf3b0ffcb1d74c7a1f97cc88aca59128de. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b584daf7-e569-4aae-8915-6c15fb618f24.json and https://artists.proofprofile.net/proofs/artist/b584daf7-e569-4aae-8915-6c15fb618f24.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 0xe09c6626bc0daf68825069a8c95a2d3ab93e78e2604683e07be6e2936adee989. Chain 2 (Bitcoin): anchored in block 958676 (2026-07-19T05:43:13Z), 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/USFVZ2190510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b68c61a975973377a74a1c5e1d17f0b71c535b9a161eb9574679297b5fd99f8. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/USDY42591951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225289b41aa68190ae9e51f6e53d75daed59fde785e6f5da926ed9022ca86511. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/USDY42591948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f319cd6a1cb6564841ae49328c393ea6edbab03aba3a9a385222395a0b620a7. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/USDY42591949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13601abf685c5401bb2d1c7c605f52d2856b7cd358bb74a2872db2573cba3ee7. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/USDY42591950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b68c61a975973377a74a1c5e1d17f0b71c535b9a161eb9574679297b5fd99f8. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/USDY42591951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d982691e97bf4ce2c7248535451e10e6a0d77574185fd168382e428313d0b7e. 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/USDY42591952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e6ab34807414e89ca0ea6abe82a0b9f4d45ce7ae6846d2369ecf761f5ac7dd. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/USDY42591953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf26e7c84d6cc698f6535707ebd6804bb5bca6480371aec41f93155b0363f5d78. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/USDY42591954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4efe38041ee9519591d1ed7876692b92884f88f3f18e82f11801e746d3d7388c. 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/USDY42591955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e4f07faf3fd65951378ed190547c385ddce64272996f2eaa3809365b55335c. 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/USDY42591956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646762045419552d5d93419502664f81e319104d79b709bc5b41ce6fb8f8673d. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/USDY42591957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd5076aa146d561466549fc05bf8d2e782f98509d392c202f756457969e95412. 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/USDY42591958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdbf996a6500d61946426ea353e64c8acd2d36c1410403b675ee47d1b8bd454f. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/USDY42591959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3152ddaa3e3b330f78d371429025a0ae9b8f90130a6dc2557fb87d1d176f6dfd. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/USDY42591960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6363f7094743fca82952579bf9084570575282fbd9a6b44885f81712ac1cfaf. 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/USDY42591961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6263f5e11ecbd42a44665cf4f58c45fa2e5044c3b32b100f8dbbe345a37ee5b1. 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/USDY42591962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892254f148856bbdaf634909ccd8cc63905c104e5d488e968f531693f4378c5a. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/USDY42591963.