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 0x06e34b4268163c4a39a008d8dbd2d4b0b3deeff2c2b991300cbb1357f0352f09. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a4ffd638-0333-430f-bce1-3c81d1d91169.json and https://artists.proofprofile.net/proofs/artist/a4ffd638-0333-430f-bce1-3c81d1d91169.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 0x4878510946781d03d4f9f92ed82c9bd23a5381c7d31a561989628a6a9d470ad1. 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/USCGJ1819191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce2f9ea4a605d566c2c2d29d4b699789f77b75f647d329a18d277470f6e15cd. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:59:13Z), 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/QZK6F2466564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a774945a537f4e1a1741f15b9d77abd948e682ad48f0fda1d4d2ba0d9c97e0. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNWX2586690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b0f81048ca5084d5daf85a5910ed0f7c4dd90595517206f72ab98b5e05db59. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZNWX2588431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571671ae8580d5c1b79ba5a54d46c7c53a85e9baf6668cc25fdd7c3d99be3e45. 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/QZNWX2588433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ffa011b4ca1eca4366ddb80c11b6782f292b663db2b640b60573c1974f965c. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:53:26Z), 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/QZWFJ2547936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0b6132177231ce4cc98353582446fef6df99882af55e27d55d3a335d82ac25. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T13:02:41Z), 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/QZWFJ2547937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51027a367aa80d2dd30ab720039d9324cafefbd3160a850e51e87028e3605e03. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:24:10Z), 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/QZWFJ2547938.