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 0x98cfedd3956476d46f150231aa5795093dc9a2efa60f37980ae30a70431be4b7. Chain 2 (Bitcoin): anchored in block 953968 (2026-06-16T16:01:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2890ba2b-76e4-450d-9f0d-7642e9280f81.json and https://artists.proofprofile.net/proofs/artist/2890ba2b-76e4-450d-9f0d-7642e9280f81.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 0x9f7a1789e7dc12685b3e31caa66561e9261a086607090705e19b640e4bef89a5. 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/QZES62371890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5fe0f9c9ccccec62570682d8dee4842bec0dd95212be8b29561c77e2cb1805a. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZES62371891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a941255f1923432c0975aa9da791555e7958a4836ba36e7c170a058173acee. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/QZES62371892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c38d81a7e7b0623c38afad449f6be396709c9f0e84701888ed690c0362816a. 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/QZES62371893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f974b6bbf69028784cdd8dc05974cb6e3e0530ae60dfa121c01a3aa02949b3. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QZES62371894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2a92c73d2d46835fcbddf0da5122b0e3dfc6fc51fd5179fa3043f652a194f5. 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/QZES62371895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x570d04910b838dd7beeacc2dae1d9a13224704cf8b4cec47cc8df06afbca1f1f. 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/QZES62371896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff5608422cb95f7953f147548bd8b4eeac5056994115c96275ca78d6e8ac878. 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/QZES62371897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb80f81e5de519f7291aa0876c543ea394b98418bf2b135a350be972301428ed3. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZES62371898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ad6719ff358f066f3994a648ee5d615b6b0b4019544b0e678d1b4b3241eee5. 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/QZES62371900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325fa822d1b93f266eb3e9085d9487f659a98f429ce5de40408395504d5d6e45. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZES62371901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x857a0cc3eae2a30652e9c3d02227b54678fe7814fb407d2140d691561727b61c. 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/QZES62371902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa35eb1ec26d85c2ef7d9458c942c4f234f97f841dcb1065e5abcced6d94b38ca. 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/QZES62371903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744eb381fd16508e579225f67fecee669f3521b6dce733aa36531571de7cc544. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZES62371904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42149585ee682f7bd2ae967a48e9e267cbb44ba0d5dc7599045e2d35ffce25d0. 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/QZES62371905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a6d190fe660fc6e86b0d9d85ecda1d571667e8cd9509349576e41c03dc963f. 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/QZES62371906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66802f44ad8cb6a82fd5a9c2de7922683ad51d24a83da0eb98acc72387da7585. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/QZES62371907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc87b5fe12ed88affd1aab103317248acdfb89303086ea300c52f20446f5c16. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/QZES62371908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f66cbcfa4b146df300fc1bce8af75edf98a1e829f799e506ab5972673e8b87. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZES62371909.