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 0x4cbcbaebf27fed967fa8277dcd162804b674f9af9c5ca1f886b7964249fbf20a. 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/b6bab0b2-d941-45ea-b25f-763205dea04f.json and https://artists.proofprofile.net/proofs/artist/b6bab0b2-d941-45ea-b25f-763205dea04f.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 0xf3d32cebc842384133611e5908814b3e29afeaf284aaa2feb8665c3891797fef. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BR3WE2100004.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1b0b04120c30a50d4d7488a1377c1c1d5bb5a8bd7381b4383b5ddbcc94f30a. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/BREMI0300052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975adf1456c7f2150d96c2229abb41229948661671dad418fa1bdb4c1f7bc154. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZ5AB1639725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a640b1627877d1dbddb170ef44c7df4df97fa2dad812dfca775f71e2441e76. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZ5AB1639729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc31d151647cfb38ce4ba732895e0f78936e8d582e7bf64dc81d4524773e5aea. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZ5AB1639732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416a4f87cdf70d61f3ec55b31fe3e717e9d8b5f7aa8fb81fdbe3f07669cb170b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZ5AB1639736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d3d26a70b16cb36e3b2ab25ee606c44ab1af14bf919effca20d4d16758ed45. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZ5AB1639737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf980aa26d58ad78c0f4660174b9bd61aaf045e37ba6efcc79fcd2015386fe8fe. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZ5AB1639741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca8c5e6889aedf33da855ea628ee9497c850526cff5e3c97c3ece80a3ad094e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BXQG92300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf85c4c309f5a1cb982605a509811d50e828f9d7d83f40f15e1960dd4a2b3adfb. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BREQP2100026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fdfebc34eb4d71d32a8d34a7d97389f8d3441d8cf37bec168d41ce452497dc3. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BRKGM1300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cdb6e90abd1f2ccb7ab87dfc504b32b2c002e006e9ae163a84b12efe0752e2b. 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/BXRZN1600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20dd0f017d461dddaaed7fc6e3d5746245bdc567ee059b09a57729ebc63af59. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BR3WE2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb4240870cf25123cff455bd2b4feb92e411625e30423ba89f6e04649defcef. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BXTM81600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ab2a746e139dcfb0bc43ef159b54850a926c75280300f468fb4f7d67ea7e50. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BXTM81600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e13a1c622c30216607e73c12f5d057b154236f308b00281094cf741b59d40c3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BXTM81600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a661d9190d4ca21dbff334007a3acd187fbbb47e187846e1fbe801a3ec1110c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BRRGE2400694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f6a8ae89a28e8bf89ae138b7162b010d284378c6672dc6dc6c2a145ccd6b6e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/US7VG2015359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ded8745caea3537986e3296a80286c8093489b7f78ebf35582a9426720e548d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/US7VG2015361.