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 0xe35df0a76401e9acbac5560145cc9b82a5fd472f71d1e890db349062f0d3cf8f. 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/970597f3-9d46-4058-ae4e-cf90f8d9d477.json and https://artists.proofprofile.net/proofs/artist/970597f3-9d46-4058-ae4e-cf90f8d9d477.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 0x7a21401bec53797de05e99ae8d2003eff8874d76032461af962637fa262c94e4. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-21T22:56:27Z), 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/QZJG52337693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605a52b05de359347522d3154da7b606748c9e347e280f3befe6ec0854bcb8f9. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZJG52337687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965fe62a09bf113926608ec9e0095c66a1f6b21af7e7799621b28d17a68cd145. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZJG52337691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec0adea43be5e303dccec6f4a93fdeeeb5bdb15c49a20ca0ca8d824507de89c. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/TCAIK2421272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e148d257aa5525f002013aacd01b9384550d4f801dd2970ba94197cfdaa3bf2. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/TCAIL2421282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b234a107413a3ac68382e674923421966c0c632875b8d3d882f918bcb8d0b1a. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/TCAIL2421338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8526f0c9e262bf89727da5578cfaafa6e6a7be4e62f2d5c9b404ae2c7528cd. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/TCAIK2421344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b677296fcfe352d384d6368e99d5a899a0266f673c98272697bc1da8d4a450f. 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/QZNMT2407176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0859d10353e2871e3da3143ba57fa73f78da3cec32d2ce80f1c8e3578c04b6da. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/USLD91767587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90062c23a545d546618fe9479bb11523202998ffb01ae0d8d890aa66248a6ef0. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/USLD91770447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf54e0511fa4fd0d5b1ac7fd5f8757b104d5d0f8d63eb31c0863f410de578106. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/USLD91771642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf54e0511fa4fd0d5b1ac7fd5f8757b104d5d0f8d63eb31c0863f410de578106. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/USLD91771642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d8750699b41b52a194d2a91c6c765ddc1db6332dc8326a290710acb654645ad. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USLD91772495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6c51c4e4fed802a921f5c3f3728d31c7fd75fb41f2edee7225845a155cac57. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USLD91772497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa821c57398f35f3d613fa7877fa19324223e28d128a7f4645d637b0f4a9a775. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/USLD91772498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dfbcab7287db841c3a3612f13cb0b3cc9f4ff27acbb956a71d6508095a72440. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/USLD91772500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5209c4dca45b0ce74bca08a8be151bb31b7226ab58c9ed36e77a2e7d7b9c47ef. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/USLD91772501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0859d10353e2871e3da3143ba57fa73f78da3cec32d2ce80f1c8e3578c04b6da. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/USLD91767587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e8075764701c6a6f39d913275a2529773cbe890dd5de45f6cf6569414a3c6e. 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/USLD91772502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90062c23a545d546618fe9479bb11523202998ffb01ae0d8d890aa66248a6ef0. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/USLD91770447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa38bea93d7484b213f21a66d7bbae479e4480704bcb0219eca3cf1464e92418d. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/USLD91772503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa03db2dbc58cb78792a0a7c07957b3e10eb1bb053f6c29c0bb97bdb6113d6783. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USLD91772505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bfa075046940edf371b5c117d2ec53c0315e21cf99bc43cb27c6065a97f6ac1. 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/USLD91775721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f8287cc0b6324b3898fa9b12c009e60a48e834f50a4fbe01d068198666df56. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USLD91775722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b2bbcac5a5f6680c4c086afa7c6319a6c06599d3a06358094c2f32318368e4b. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USLD91775723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94da3c36493cff87459ca2ea674f4e3139651d83e7161c73ea826de32f38af37. 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/USLD91775724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c1f648ed3b3ff82740e223524cc7e5e9a884303be6776a75a2cf8164f33f23. 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/USLD91775726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53d4823bc30b6d837ac83a5735a77035d2a0ce6aec2aa4df6f71b8496dce951. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/USLD91775720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f94447eebe60c2cec640e1542cae53d644df1f60c701eb8efd69366c5024b8c. 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/USLD91775727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5741cdc47f1986a6a2f9a80796296f7a02a692d2be193204be8029ff2ba320. 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/USLD91777576.