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 0xaa99539da0449b189249ec4487f00dbba74d060d1c4a2ad62a18bf4e02d4d0a3. 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/7e5ec477-957a-4632-b905-59d250fc34d7.json and https://artists.proofprofile.net/proofs/artist/7e5ec477-957a-4632-b905-59d250fc34d7.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 0xefb81389546ebea9b1e5e34ddf4aa799b659800099ac341ad024369bdb3a6a26. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/US27Q2003102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244c9877e2a1d531ac056c13747b593d3d6722503f95efd18e749fc018618b49. 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/US27Q2003105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf9ea9dcf5fb84d3baa06f9ecf547aad9f4637e4b094e9d2f12564cc585db86. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/US27Q2003107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca527b0cd789f9f4311f610ebf2af6dc250db04df8e5a0b1ea27a33501f930bd. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/US27Q2003108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8748de3297ab48b1dc5afe869a56ba741847813622cd51534635de7c15a4c398. 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/US27Q2003109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece85a81bdae139cbb8c4549208a8dee65b367b6ca628b16c2dff5f7c0a683ab. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/US27Q2203603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f354ab486d26bc72e31e1eb31e7f9e85c7479792e30395d88206480d952021. 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/US27Q2203605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf79d6f593e0c0a85c5f13a8a384b5f8adffa47ed4a49f6f7a67bcd93a38e136. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:08:11Z), 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/US27Q2203612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee8691d6d49beafc1bfe4530f51549f43c46422fc59f0aae945fa9ef4187f9df. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:39:04Z), 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/US27Q2203608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973ce58e46c69c6a7a61a79bbc5963f691a664cc60d2b0aedbfba4e717730993. 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/US27Q2203609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678df77a85e53f33315ab553d6860e0a89e3dba0017a184dc8c503cc105968a9. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/US27Q2203611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cdabab0efca5df3f2f2e2ee093730ddab9607cbe7c90eb8492e28a596b6e86e. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:22:09Z), 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/US27Q2504203.