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 0x2ad01b289daf00fb2dab122895c917cc84f4f796b06f7e0ebc1871e7cd3c1aa3. 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/1488b5a0-a2bb-4380-a2cc-b50b83dd20d9.json and https://artists.proofprofile.net/proofs/artist/1488b5a0-a2bb-4380-a2cc-b50b83dd20d9.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 0x42f068366bc37071f573885846a2cbbc4239938e7a2c35724539840348e7d04f. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/ITUD52300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce1e84e6738754ba429663f4f6bdb839ff37c63c91d6e81144f1696c4fea8f02. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:03:59Z), 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/ITUD52300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf24b01338f305a37bb73813165376d3037cf475fc67cfe6e1154a9cd45e83d3. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/ITTQB2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910fc82a458d2cb7fccf7fbe5ceb3ac9203202cf0b7843a7095e70f50237c206. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/ITTQB2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x586d157ea8ba1ebc0d6fcefefa9145393e5aee3290ae06e2db029b76b6a606a4. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/ITTQB2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba8e8018bb62d65ab81384f2e2bc2f7ab1fd2aec6942a98cfe46aa680c22d98. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ITUM72400920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b2ccaaaf00fe2b5f0fa8e5ce8c6974f24074a0e8df77a5e8e656339d997562. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/TCAJI2590232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912a2c6af2313125494bc25e8d653f9ddad7240c92d84377c35142d829b0dc1b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAJN2569592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a9fd28fe7c842d2358293721048447a71e609e9622002dacb1b905098ef20e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/IT4U12300059.