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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 0xc5c3bf18fd20a1753eca458bd03af9c337c98dd9f7de4688670af0a84fd0b5e6. 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/8848963e-c511-40ed-8206-4d0a6c5c12a3.json and https://artists.proofprofile.net/proofs/artist/8848963e-c511-40ed-8206-4d0a6c5c12a3.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 0xc1e584c3aee9d151647f1e0ee00df914f36f212521a7236d28551bf73b411d70. 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/AUNV01600554.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf847e4b53dbe876ee6ae50d794f6685ac73e9c30264d2bfeae826482db7abd4. 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/AUNV01600555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7baf172477f223d7f1e432a57ea286b0e075ae4d37a40adf7746e112a68c26e6. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/AUNV01600556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5861679d393a46af0c3f27b336975807fded8b3c0c2b42049aaefd23e65039. 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/AUNV01800320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf917ca093c9f41938d59f4d06b187382b43a532026b66d6916837bc69acb8d. 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/AUNV01800201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae103cd6a015b727568e79f118921370ed4992a10df20701098f986be964617. 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/AUNV01800316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab61e46d799fc2e3c36f8cc241d8d5f26a3204ae03e14ba1afdc48530897f227. 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/AUNV01600786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x288a152d0785c16fc5c258a9ecbfb12d76b056e629e8b600eba509e134da3d46. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/AUNV01800317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfffda2401b78c0eb5c542322d85bb25907cf85da1c78fefd9f1507ed90587142. 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/AUNV01800052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc356efb514ffcd90a0adb88289ef12501e8076f4be4fe8eef6fa797ac584a2. 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/AUNV01500889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47179ae8e3dcc346b764a1b744967dbedc3a40a248e3f6bcd3bea6611222829a. 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/AUNV01600435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5ce9ed11504e465925aa8063ebdea3fa304e07fbc52f30e0f33be440dcad68. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/AUNV01600439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe74d499f2a42c2d0807e7774928a6928b05cb64c6ccc28577f6ea07f78a74dff. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/AUNV01600434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b4eb5c9ffa83cf557bc4fa474656f059ef7f64ecbc0a563bba59a601556e5e. 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/FR96X2132961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9773a454102e57bb7a051038e4fa418fb74a3522a1935cd615e1154625bcf6f4. 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/FRS182060654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7a0411222485f7538ae5ab917e19a2904573bd0202b12998b6b96f9c40c77b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRX202056072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b692b5cb102ad1785428d0f5e2a507c9b88743ab50d918883de098c1958f252. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/AUXN21807632.