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 0x39ab55c0870c780ed93bb5c9a85d88ed90e44bd1eaf2cdabcb4592fdbf589c95. 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/9d2cb696-14f2-478f-84c5-0d783f9516c7.json and https://artists.proofprofile.net/proofs/artist/9d2cb696-14f2-478f-84c5-0d783f9516c7.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 0x4d5df39514827838fa891aca07955b77b86ded82067936e675984d2c3ab8d90c. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/TR0511603871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09887596bf8e5265445029194c9c06c908b00440496a4ab015df8386136194f3. 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/TR0511603878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bfaaf411d795d841c79c4132705755200eb72b983026b9dea5dc49cdc73fc31. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TR0510640040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10914b6ecee26f1f5295b51a1063723aff22f2c7f025fba57a8bbdecc916e0b8. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/TR0510640042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39dcc8d12520c91d3bce329de49bc1cb66773b367a72f327c5360120e874b7db. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/TR0510640048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4161be957d546d1d683715fc08b3319352877d30e9b01586dbb12127d4836ba8. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:52:09Z), 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/TR0510600415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0965130a10ea718338900417d4012f3b288caf1cf0d681e37d59255cfe9a9add. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:10:56Z), 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/TR0510600417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0fd998d008d83924341b4c78480b0ff02a782026972a16f504bbf30951d2072. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/TR0510600419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303916bdf8ecaf0db12e7ce02f16538a0ba33774b6df3fb34874042f236105f2. 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/TR0510600420.