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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc48ddaab13e5d2ba6dd4544b4c623ccaf5ea10c1f297720c6959c4eee51f5b5c. 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/38d08696-9300-4b17-b9ba-93404f087b9e.json and https://artists.proofprofile.net/proofs/artist/38d08696-9300-4b17-b9ba-93404f087b9e.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d4a117e0639c4784fac248da79a54342e40f2fbe998cfa097933deb5044eb2. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/BGA472028411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946031e995a1c77f5270e0d1455cc405056d58d01d227d70fc795b43d7549717. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/BGA472230272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24507e19401d865400f98e0f8156fef3a063c6da70d255731967823f816a689e. 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/BGA472230273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1acaee35c96ef607d05f0617e7b1f863c46675b47fda4417ece3a61b9a93d5ea. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/BGA472230312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eeb0780cd62b3f83163bc10a9602d1d3393b3c1940ed194609b2597e42ba6f5. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/BGA472230313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe89e363b578a18d3ed19d7adac88eb3ab4c8af1968320a54a623ee42f4c7483f. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-21T21:45:32Z), 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/BGA472230314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c172a93d134c543f9aa2e25954673b9d461d5f0ea4b0a2c55603fd267d0b194. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/BGA472230318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca2bae36d1dc4f50ba68bc7debccc97fa70642cbdd69883f762cc180eccbe3f. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/BGA472431819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f573b929a1f939bf7747c7e55c9c5949478824ea407cf27b86fd336c4fb898. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/BGA472431823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b537585ea2ca3f5f041bf6ca9bd7f80917d422e0ba5c31b145d9fc14e08b75a. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/BGA472431824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4adb78afdea9c6c0a0e6a04048d3d6ab56d51bab63b5f67007e21d240935fe84. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/BGA472431825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e366d929c4c8c8496e65a26d6ef5468fa28ad85c0169596745e3d8b7f4cebf0. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/BGA472432491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d01b9096168dee10175725b90596cab4e6602404921b4adf384ac4508384622. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/BGA472432492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6371fb3cb12e038c251414d6575477bb4a9634564309dd778727c6ed22f4ec1. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/BGA472432495.