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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81638221255e3bc1808af23c52a004aef36555f8719f8aa5f26734aff17a540. 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/0b0171be-48b6-47dc-8e79-4ad434650af6.json and https://artists.proofprofile.net/proofs/artist/0b0171be-48b6-47dc-8e79-4ad434650af6.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c3c6e622b0ef7b5d0aefe416323c1707a060bc3c2e080f832c8f714febee40. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/DEAR41047098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d07c82c37bbc3e9487aec003ec11d190b3739c83ea5aa4742a2623a4f06fa52. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/DEAR41059485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ffe524ae42364439bbcc51a242840e3f33307aae691b05fcbadf038801dac0. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DEAR41174552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e31f7fa6606f15f52d7e948f5c6290d74bea9c4aa721f2588b1edab17dbee29. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DEAR41247599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ff36ab56981c1d6e8527418677b1148f5a73234753cc6a71dfca21906f371e. 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/NLCK41042381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6931ed02f11b22d4fdf010f0f289e60274fe73b801b456b40e5087529b4ba2d. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/NLCK41042384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57735edc488e1a94410e47a6aa7d73a23921779f63ab324318cf0eb458732959. 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/DGA0Q2378257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ff0e5c8351e5a93b2282331cd6b92d01a0e903a6783dd0d9924c8391ec77aa. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/ES55E2500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c7ae828d8214bf1dbdddadd6ef1c71dc03ffb2140c5630c949cdbb3fc358ad. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:50:56Z), 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/ES55E2500019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823b82e436f49e78a2385cf5df01c1608f9235b0cef8bbb16c4bba32dc7a5204. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ES55E2500021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57735edc488e1a94410e47a6aa7d73a23921779f63ab324318cf0eb458732959. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T14:05:48Z), 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/DGA0Q2378257.