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 0x8baa7cdb64e4663b7e7ae41b3d3fcc38d50108366549883d4e6e80319802325d. 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/4b752cba-374c-4d1e-9590-c48eaaecf76e.json and https://artists.proofprofile.net/proofs/artist/4b752cba-374c-4d1e-9590-c48eaaecf76e.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 0x765033688e406d5ab4851f369824fb9bea55e5d4ea49ba56899a3f917caa119c. 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/UKXN22370963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f0cac9bda58566885cd23ab393e3064a49fe9f8f951676995373fdd283df38. 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/UKXN22381879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2eaf313ef3180e189d234a2f7c3b435bd35b01ccd81d596ce9ce1f2581bdca. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GX3Q92308843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88056ca298e12072292cab70969b911da6cbfcd1c652a80ac0efc58bb4499c50. 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/GX3Q92308840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e08345732a395d78721a9af2e3563d6e2ef483c83a7d8ea223190114b63883. 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/GBLFP2454063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8dfe39e12e1a293e33c0f5a001b61b9b573a290901fd9ce03da411885825f71. 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/GBLFP2417402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa2f6a1a4d8ace71479be827c396c112d546688e1d8ed987e99f91d61dfba43. 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/GBLFP2418247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a09a16f6eabb9f7f0b8e632f039c8e037048b9178d72c572496ff03e73617b1. 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/GBLFP2417398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b2b23f03512b0eea3a083003d266d8fe1b30537128aa58497455ae3b949436. 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/GBLFP2417400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8dfe39e12e1a293e33c0f5a001b61b9b573a290901fd9ce03da411885825f71. 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/GBLFP2417402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccbd22a857f01e47b696231b7073fb962ea2b23ea256bd5a748c3fd31854505b. 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/GBLFP2418119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe66a9312be301e489e45723aa86c0d80808b1e469c5e2f3e6c98db739807312d. 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/GBLFP2418082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1944f4cf89404ee9c604641c9f5bb58ef8e75aa02d239cd8f2b9147cab9c53. 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/GBLFP2418076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2e92f9b06049f56effb551e5477a082aca37632b1ef15c6f38ea65ab99b6bb. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/UKXN22403483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3381c35f97f561cee0521ff4b2f0adaad386758137093c281fb2147ea59dff1. 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/GBLFP2435372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1944f4cf89404ee9c604641c9f5bb58ef8e75aa02d239cd8f2b9147cab9c53. 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/GBLFP2418076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca5807dfad3bbb6aef5939a4355512ea1234f730a404035af84f4c72cd7fdc6. 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/GBMA22340605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82a5b40de59ac113bf7624999010c74702b06751c902e3dc2214228a9552e7d. 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/GBMA22315525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf79bb64db5de0b3c39cb591f211794199d16bcf26bba0f27c556188310d9c5. 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/GX3Q92308836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x743903d7ca947bbf3abf18ada8d9404e03e297f3e535775d2f585e120f1bfd0e. 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/GX3Q92308845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf79bb64db5de0b3c39cb591f211794199d16bcf26bba0f27c556188310d9c5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GX3Q92308836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88056ca298e12072292cab70969b911da6cbfcd1c652a80ac0efc58bb4499c50. 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/GX3Q92308840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2eaf313ef3180e189d234a2f7c3b435bd35b01ccd81d596ce9ce1f2581bdca. 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/GX3Q92308843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x743903d7ca947bbf3abf18ada8d9404e03e297f3e535775d2f585e120f1bfd0e. 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/GX3Q92308845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82a5b40de59ac113bf7624999010c74702b06751c902e3dc2214228a9552e7d. 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/GBMA22315525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67042c16ca30bda882d158bab868ea04ab31c4387cee4213afc060d57c1c6408. 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/FR2X42559713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5efa687a5f9ab04d751b8ce040cf2f06b9c16b679f582a9ed5b5cd64bd1b4aa7. 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/UKXN22519965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e544df8bb15b5b5119ded5568ce2a5c3917ca1ec31d2315944e84e46be74573. 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/FR2X42568450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6edf3df5a13ba01f3d3295452cfc58ea63cf68788024f0d5d18eea332a22bd1. 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/FR2X42568452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x702371d7b980a0c4ce0cdbd124f0ac3a21c1366cb9ccb81dc02d609dadc33068. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR2X42568454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733faa6c8506eb082d094994efe94fec08ad3279728e9884be04da9f03d702d8. 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/FR2X42568456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd836df1f6312dd9bea21454e6afd2f03c10f1d0b096baea1cadf98c6df3cd44a. 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/FR2X42568457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d8f5704f788d4e97875559e0e17bbd14a17ea705fcbef11eb3bf493cfb3c11. 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/FR2X42535534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d92bb19b147814746594d4c2212fa940ba5d21311e5e8d1a5eff2cc9d98259. 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/FR2X42568458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05603ac145896cf8d48623d67adf4e8bab9cbdfd97a75cd4cc33d9742f4d16f9. 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/FR2X42568459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67042c16ca30bda882d158bab868ea04ab31c4387cee4213afc060d57c1c6408. 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/FR2X42559713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d8f5704f788d4e97875559e0e17bbd14a17ea705fcbef11eb3bf493cfb3c11. 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/FR2X42535534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d18fd413be19144cf5837ab675ffc866bf49e4291729162b6dec3f2b1a17cbd. 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/FR2X42535535.