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 0xe9955463858c3066b6977738ea6c94a3d743dbb5ae8ffd59aa7cce9e5b33339d. Chain 2 (Bitcoin): anchored in block 954043 (2026-06-17T04:15:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/40b09418-fc76-4004-a139-cd8c62c5eb58.json and https://artists.proofprofile.net/proofs/artist/40b09418-fc76-4004-a139-cd8c62c5eb58.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 0xbb29167c28bdd97925c20c2a962015485a44c87d66ac7bc0c59695050e126829. Chain 2 (Bitcoin): anchored in block 957057 (2026-07-07T15:21:38Z), 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/BKLZF2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e7bbcea7525e3381b5abc8bb7a701d1ca1ac50bb355c370b060afb98b1c838. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BKLZF2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7483118fd7143b4d417a67a0a952b0b6816b2059e0f91a0cf7ab115044f6fdab. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BKLZF2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x627765ced346ca6d8f6e101f01c0ac04fc12b9899e5ed2c6d4d6228cb0faca2c. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/BKLZF2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383f89551653a4d3bbe778d7f8c71bbed49e3f44d883dec9f669f47213ca1941. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BKLZF2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc65c890cfda6b2c61bf20f252fb8f7e82756dce54f127a51aba18c7b8e1064ec. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/BKLZF2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc65f933cde2db6f7736837a209a97fc1cdbc88d7bcf473b179ebe60e83a1bb47. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QZNJX2284126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4604860e37c40b75ee908b58cc198e120764a300dd885c3ec4fe8561da18f69. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BKLZF2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53cb76e7a945417e09b18ff7ae81831dc45a33516d9b539b04064dbcd64b0e8b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BKLZF2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dbb5ce967874e0c5736a158aaebc34eb8aff456a0d63e5917b21ad5251c51a5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BKLZF2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9c2bcdc156b9d84bd838d77c91111eec5b11fbebe0288da9599d62547e46ba. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/BCOUZ2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97204e936cf552c7b6bc454e0c7d627d7f7ed4511d801737241e3877a677601. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/BR14L2000020.
Valete de Copas (Eu Te Amo pra Caralho Então Vsf)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7acff9b9f4767d660a27190621a624f5da9f222ba603c21277d268c2a6eba4ba. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/QZNJV2476526.