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 0xe2940c796c4808624398167c49208a4a907a9d2cae990fa956280be089b019c8. 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/efb78cd8-1a8f-4208-99e1-2da194960065.json and https://artists.proofprofile.net/proofs/artist/efb78cd8-1a8f-4208-99e1-2da194960065.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 0x5c36111b9e336a15cf65c55835135db9037cd0abbabe92984ad680c79d3cb765. 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/NL1LT2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7a6ad2cea58cfe49ca773e9473b951bd2ed0c1fe19742fc8255060e280190d. 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/QM4DW1703397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc898a91568a2511766ad7d89ce6028d7579c630b8257d18ce0ea751ca77c5c39. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM4DW1786471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3707ebd7358284131613a9a71909f3ff45d2e84eca278dbc305ac01a53af750. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZ9JZ1764659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410ecb29b2043b6547ef6d879be19130a2f227752aa33b039647286f8219e3c5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZ9JZ1764660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7852ce42d035d73778e13009c7e0042a212cd3d8ae5328a42495e900e157a602. 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/QZ9JZ1764661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c016034f8b431b96d74af7d17b1d6ac81b616c0e8440907558d10ea1512946. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZ9JZ1764662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd1aa015d5b349fa6ff5914157984ec3573315dce8adb684eb2b3a8977040f0. 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/QZ9JZ1764664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc7228c5ff590152207a8d2b01753fd5f7f3c0ebbd38b7b650b0976ebe42130e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CAN112300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f01a14ddaf4f2b22171bd7e9ff26afba997d7b042484f505d91b966d5a1de57. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CAN112000176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca75ded8794431fffa34c29585c3557aa8219fd24a41979689cb1860a81bccd7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CAN111800370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c6623553cb36401d97d3f0582e22285b148652a1340a7db67e48ef372bc64d. 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/CAN111700553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f20b7ced3190202f6c03575620303db5a6ebfcdb61da90a631836237263920. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UST8K1426308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131eca644976cd8f16b4c311973fc7736b9fb990a4747f95befa155b80672a58. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UST8K1426309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2525b92df7ae80ca0dab8d3060adfde4b68010f1ac158395170699017a8e601. 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/UST8K1426310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b2084f85ec4cf875cbf9f6b9af453da18a7bd72281deab2fec61931a22b1fbf. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UST8K1426311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c6b6a0ebbf38a5285236748ad34308e39597642abe46e20950afe049e05ef44. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UST8K1426312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d29447ae34064f2882d2a823084eb8dff9d16cf076cafc57af58f597c51023. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CAN112100813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd996486166c66a8105a1bfc9b31321a602b109cbfaac46c68b55c9e3f0484216. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CAN112100814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb93aab3a7fb9b778468d2e3f463a382c31bcb7e880d1693b27baaf425bb94846. 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/CAN112100656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc142541e25a467585b0bba66222988903a59eaf0689c69821176714d39ce8a31. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CAN112100745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58ffb7697414f72a4d3ac265a9d48a3ca11dc80ba4cf2c39e945fb647012691. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CAN112100447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a9ad4e49a2b604f78f9e4dc6e37257cd832dd91ef5689e8492adbf8a9a02e1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CAN112100511.