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 0xec28ed27ea53cb10445c2e3b4c63567371a8b160d0d6afb779ef00d23a2201d2. Chain 2 (Bitcoin): anchored in block 954647 (2026-06-21T04:36:58Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d725cd5f-36a7-4cc2-b746-beddc055b505.json and https://artists.proofprofile.net/proofs/artist/d725cd5f-36a7-4cc2-b746-beddc055b505.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 0x9c22ec3134f4c62cb9409064cab8308d087edbe29b0f420b22ba7c8b0b6c29af. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBLFP2581844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d8996725941be6cc234ddfac384105cfc50b79277ae4e6e623cc5d38f1d352f. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GBLFP2581845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bdcb6a836c6a07a9ec22894696a2e5f450892ebf0539a3689d64ca09bb759d4. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBLFP2581846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3692b32f7f19400bf9ce2930e3bcd26d4d4a079d8ab097de1db0e84da04d14e5. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:39:36Z), 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/GBLFP2581848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd8cb537405d2bd1912de29675eadd3c78fcbde17dcba7f9f90f4a926325001. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GBLFP2581849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0eb0c362ecdcc3b4e1b58d839d3167c7fd4024395fb74d154c946ec4377064. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBLFP2581850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96634b637315437babbff15c44a5371f440da2503e4ff12d6622a882ad8a8715. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GBLFP2581852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367268ed8ceeffc433608444303e9fad3f111f00c61eca3cc794cc34fbaafc58. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:36:46Z), 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/GBLFP2581853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c7967b1b7e32b036079ed9ce39a29414b95d5b65074a7712aaaa24286ebfe0. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T10:13:17Z), 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/GBLFP2581854.