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 0x0d8056303e0a0782b48c25e502a74bf9fda3543606fe15ad804b388e7848e617. 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/1b2b9bd8-6418-4946-a9df-b5ae1c430d6c.json and https://artists.proofprofile.net/proofs/artist/1b2b9bd8-6418-4946-a9df-b5ae1c430d6c.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 0xd96f38571d5d5e0f390182d665e7dcc55793518d899b0a7fe9b15ce894937954. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/ESA122477945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811f1f609eb5967116e10a7428f0ed057d327ba52b7728374ef715f3c9ed8a8a. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:08:26Z), 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/ESA122477948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e559ac2df6068ea818f8a96e366088cae7c10d1c1fcc7863cc5cfcf2662e6e. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/GXD7G2582792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e559ac2df6068ea818f8a96e366088cae7c10d1c1fcc7863cc5cfcf2662e6e. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/GXD7G2582792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x611cfcbfc553c56f8b3ac6d5b78516ce137678e13c96546bd94f80b28834fd08. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/AEA3A2544397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4056f98b19b5d583197f59f77a2d2ede07fd13669d79950dc27a7645dc040ca7. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:31:03Z), 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/AEA3A2596786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c42f082707aef0cc9babc63f7058e998f7902ea2be796ea4a28450bc01a1b44. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:34:43Z), 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/AEA3A2530995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c8a748cee3b05ec5b3e76b18c011a565cf32c6d0d8c87d55fa6fde70794f0f. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/AEA3A2504640.