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 0xd4669512005d5df203fdeda3de88bce7115bdeec96718398807db24a7c5bd235. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7b796894-1761-455c-83ba-03d1a5521379.json and https://artists.proofprofile.net/proofs/artist/7b796894-1761-455c-83ba-03d1a5521379.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 0xbaa5365b7a2a2d107f8978ef8058cc01ba1decde32f1bd99b2a3a2edb2bc8996. 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/USUL10400344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dfc200f56f92557b6db0d9fa1f964136589ebcea9305f95fe17e38279752ed2. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/USASN0801199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74038cf921f7a357ad03933039bd034f0a6aacc5822105f248e92dab7182be85. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/USASN0801202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c18ebd2387c6a894bf6ac3301251edd49067aaee06d36cee883d6dd1c0d0604. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USASN0801203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x983288df3151736a7a030045fb54493cb2a651dc793ec3ab329de82b884eba93. 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/USASN0801205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9282e03b37d843d27360cb2209262c0546d04a1d03670b209b255177c3dbf1e. 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/USASN0801206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9305bf4fb9cce5ddf0a979dd68ea1dc399241d970a1ce85455d59756e69ffcd. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/USASN0801207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c43dd6cb1c4aa9fa54cf173c8ca7008f8b021d06334b3564a61df4be7ffe2e6. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:00:15Z), 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/USASN0904435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e83d08d1ca8531783250e02fab85f0ddb0ccfb1715b1a4e5f0cc1da46dffb6. 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/USASN0904442.