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 0x2b3ba026a41e5c8b1c8b98d3231c8062e31af8790dd27a0e82a07e40c7655756. 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/816b11e2-8741-4fe7-8111-401f0f80720f.json and https://artists.proofprofile.net/proofs/artist/816b11e2-8741-4fe7-8111-401f0f80720f.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 0x109bd01c38dc85c96fc05e2cf06e5ac753820069f13938a6fb17a69136579dbb. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/IDA642102825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a05382e8fd1d83ff0dd2e195bb81f7c5fd0d6ffa8567e13a9870040885d8226. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/IDA642103140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a39a8972f176b4611a127fb0366a6de13e260af5eb03cd5bace1f0ed599ca1. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/IDA642405175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3b69e1ec3d9a7b589740e240f306e860a678fb0c125c94421be406975b2b6c. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:41:11Z), 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/IDA642405349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb0019757c5d15c253087dd702ea5968a2698884aafb5b11d3221e114f9bc95. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/IDA832401789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ed439fb4e964d72f85026c02084043980a1cb0128f3a091ee4508e9ef8b2c0. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/IDA832404154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef2e5dc971fe18e544514744358f1610e06d0a6f7bf0d7a156cf4a42aa3b23b. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/IDA832502304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab36e3768cd11cd1210cf9475c64b4fba588051a3e7d2aaf21b8eadd2144c981. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:00:30Z), 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/IDA832502969.