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 0xd4c23d445506084bdc2afe09f0eaa3d950c2581e384519a0665e59f583c87325. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d74aa1dd-d6fd-45d0-9358-ee4779696c8a.json and https://artists.proofprofile.net/proofs/artist/d74aa1dd-d6fd-45d0-9358-ee4779696c8a.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 0xb661d122fdc3d01b0a7a52a27b4813715ecf7180e050a58cf6721e1e31f6c171. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/GXD7V2570233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc8f0b0ba98ccb7f15bb45f83728391033331e67f0202bd55dd054f831eaf9e. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:52:08Z), 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/GXD7V2566126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0642bb6c19269159a58efd2b74d3e9dfca9fcee2907d22b7ac151e796b0e79. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:51:48Z), 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/GXD7V2573331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e359063e6a3f1e23e0eefa59ce0b0008393f0a88520410b50b1265ea799ee5. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/GXD7V2528921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50cb054cafed76beae45722240b438560ec74e4364f813ea51706e942a8ea746. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:29:56Z), 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/GXD7V2571708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8abbd0d5f967297e71162c6bad5660ae5d8a75124d55fbf28bbddde9661dbba6. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T04:58:35Z), 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/GXD7V2570613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23865d50c55d3cdb619c1289472dbe107bcd365ea284bd91c1b44be9274a87c0. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:58:41Z), 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/GXD7V2558482.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd72e917401748791fc4a21640cd6d1b9983f46673916f13fa81792ce0cef8b0. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:03:04Z), 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/GXD7G2579060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb292a84fae2b8c35014d7a4a7c90fed857107f7387588645d0512fdbf2b5f839. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:10:00Z), 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/GXD7G2512816.