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 0x098dbcabfcacea1e4c069c7ebfa56bb8ca26fcb0d0135167319ae755c83d4b3a. 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/0aae6350-c72f-44c9-9fcb-c4aa3e346374.json and https://artists.proofprofile.net/proofs/artist/0aae6350-c72f-44c9-9fcb-c4aa3e346374.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 0x924e8741afd88521d5694dba48580347243f6bbf5b5a66d968bc8d070b0bdb8c. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/DGA0Q2424902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb850e2e53c40a5dd178c5bf1107d6472749d5a6f81015a55870dd4760f709013. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAHP2366181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b74d58d0a89f6d2be0c4db0a7d7b6e412f6a74ec698cdcd6080ea450bdbb32. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/TCAHP2366284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0bea5fb905ba7876ccabf567ceae0149150f4854a802fa9e747342cdeb387e. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/TCAHP2366305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7eb32678c8a8794cc047d0fd9d227ad8af50d1db1c7969ea7a28841ed2d6e7f. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/TCAHP2366429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x893b62fb0ee8ab1b2b3d06231f82c9c88d0dfd08bf59575576a72d98523ba5a6. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/TCAHP2366919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5e1ee4e17dc84100116bcd16312789ce1f893b97378be58947e92f9277287e. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/TCAHP2366957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e0425a806ac66b35ce390fe04fd9b230c34ea5c0a3cf5c26561a16812892faf. 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/TCAHP2367107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20023b02359965b12c22aaf8e4180196867da4c028f060bbe387e5f13aa8db2c. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/TCAHW2483135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfdf10a82e840e03f484b908c5f40a496622fe4e9a6b58d80d03f41eab12392f. 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/TCAHW2483110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb2a3a082e80aa5862bc1a32023fb996484a705abbd6ed9169ca6fc419a4517. Chain 2 (Bitcoin): anchored in block 957796 (2026-07-13T03:24:42Z), 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/TCAHY2479258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04deac6326c04fc5bb425e60249cb7e11edab5a6d39417a1c0eeaa7408a9ea2b. 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/DGA0H2400288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0d1d71bcc39616ef7d5c603ac11b1a92026905de5edf69220ba5777eb9a72b. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/DGA0R2414021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf17365731e0421056109ac42bf29b8bca9cb4feb04bf62264af149fdc6a6de0f. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/DGA0S2461428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a46083b2dfcc6af9da88e18549316b6b15ef3dbf37382a4569dae6c7cdab26. 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/DGA0T2428832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e06672db147579d887648e9137e5497c053fc619b5fd4af659fa1155616fa0. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/FRX762507967.