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 0x2bea1ea5043b4437e0ed4fb24eee658a6ee496bb8c83b66214082f312c885bce. 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/4daacce8-4fb9-4824-824a-5e35af2f1938.json and https://artists.proofprofile.net/proofs/artist/4daacce8-4fb9-4824-824a-5e35af2f1938.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 0x9dfb33bd01c7567d2177acbe5873a26ff5b76adcfaa4525e2dae9588581fb9ec. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USMH92358794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4280b71b5dee2c3114992b9d6f90db7f058a322e75c4be35e387b21caf6949d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USMH92358795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0097cdde8d01d9c2bb1e0fccc74bee7c49958ebe16d103a364f76a00faffe59a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USMH92358796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6883667de38adfdb87345f5dc5ebfbee0bd5f879c226d8540c500d4090d884ab. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USMH92358797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3045116bf9fbb8c4da1bc0849c648d40447edc231963f518db187a3edff327d9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USMH92358798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c4bc1229e89ad3506596f8d33625d9ee9da7bfa138c90175ddc6e2d979fe663. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USMH92358799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc5a7676b3bbde88ac74043fb8f462cb06838c234eb86ccfc697784e86bcd6df. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USMH92358800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc788c08c97e149b939b402cd3d632cd8dc5bd4f08aab5aebf5f971cccbca5b5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USMH92358801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27320b8db24c4fd344c5fc1db84a0b259ae6d955a466df88d348acda0e9c3a18. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USMH92358802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf5ace6f767b850130392e5f98898049bc24f255481aacbd149bc2ee178f868. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USMH92358803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe37b5eebcfbb894eefc25ca7e19ab143e8f0656f7122d332bee5d24ac14b8596. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USMH92358804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe141dec2ae79048ac3e32d83dccf9866d8aa5750cc9eb4c9b75bf96f4521a8e1. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USMH92358805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1f9410ab2d0973481f44f537092e05285ea90fd79cd7892fb450996a5e479b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USMH92358806.