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 0x85df46a3da65bb2ba96c61bd2fcdd2af107d53dccba8729de488188a692945b4. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c409a4f7-6b77-42fd-8374-73391fa86ee7.json and https://artists.proofprofile.net/proofs/artist/c409a4f7-6b77-42fd-8374-73391fa86ee7.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 0xed90ebf62a2ad72b2dc0bf154c07a80ccf36f86dcbcc39eb771aecbc83891af5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USME32000129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6809bb82825d7fe3f41b1b49e991cafe5072ed15703b0f16cfdf4f602e58a45. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USME32000134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383fb3870bb3580880f9bb7dae7f8b0743a8dfc630d8dd5ccdc2e2b82f567f2e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USME32000135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4eae97417d964cd0a317fc3ddd9314150bde4f5d0e46d410aa55cf0a682338. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/USME32000128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e365426c6f6cb4e6fc949a479b64f8ce04becbfbee742a7bf7ca9e973f6d5f. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USME32000130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b07cc32f8b677432b3c6b886ff437cd04c44ab8ee4ffb7730ec27baecd8ffc. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USME32000131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e071ab1d6f6b8f9cd2073f70963414a52a0ae446ae522c94203cec357c39ad. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USME32000132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2005db8cc0a260fd25d1af76ef62582199c31bdfcacccb25af54663fae95f7db. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USME32000133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa209d5e2040995d1af9934434e2d5baba34e970e27f2a37db1a2ddc53727ac23. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USME32000136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ef079a7261c614f54c3462ae8a9be2dbd21999d2cc3023f0930bd247f0b0b1. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/USME32000137.