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 0xee5daf09a92a72df2ca0f273590d91982957538c1f80ab5a0ae6771f43336e09. 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/27477e57-ebcc-41d8-aa7a-29d90a68333e.json and https://artists.proofprofile.net/proofs/artist/27477e57-ebcc-41d8-aa7a-29d90a68333e.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 0x01e19e9747742aeff7c782bae9b29b7914ceee7699405ff3959e68502e3e13c1. 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/AUNE31900036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb24ef8652ed11fca524f166401750265de0692b41718685d1a68822db6dcb36. 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/AUNV01800272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb0f433ee6879e33372b72c057a1bfeb1475f4da1af362ad19d9be37203d009. 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/QMEFH2310006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b21a5a92324566673b7648dbbdb4e39c4c75397ee6243fd26cbda1e6d4d858. 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/QMEFH2310009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be7cab765dbb1e68a47228fe054f1359d237955e95537d7c1187b0b1b4fa8f7. 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/USHM21824925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77405afb031553608771e974ac108d51dfe4ad4c692d83e89ad24727bc9808af. 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/USHM21717747.
Should Have Known - Tall Black Guy Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036aa719e1b4be449665047eb7c864aab74527d4e30dd51fb4bd2bfce8fb3a17. 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/US6R21365267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46fa66e28de5e08e9f3533c98495740753a186cfd3639ba6ce3d63cd36acbb64. 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/AUNV01800468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2884f22f970245d546b729451528a0ff826be20c4758e3bc7ef0c3de0b426d9. 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/USUS11600329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb260ec0885cb23aa4bcab55cb8ca9b1d8b4dc79fd872bf486a8ae3d19f34fb7f. 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/USUS11600399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a431e7a9741b8cb0bacc808d6f2ace2664c5338cdf30d8ef378be4ba833d744. 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/FR2X42494367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8fa63e4818baba1856e21d1e2310a91803903ffb5872d0cd0839c18de4a11f. 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/FR2X42494368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6909e2eeba7adf6ba3b786a521f66534c20ad915d5953757770871319691da4. 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/FR2X42494369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe81e013bed5beaa1b98ed002c7417b2d4e8a17d46ce390a59d36caecb4060a52. 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/FR2X42494370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e90afac0912b6bf9a77e73f18c90442f60ffcb56ed8ca3cdc90f68be8d7e74. 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/FR2X42494371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x675076241ff20ac7e24140c76626176aa97b395e44b1d7657c75469838914f63. 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/FR2X42494372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5416779254f0d4359dedcfe973fdba2edd8e607af8dea4048739b285230ee4b. 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/FR2X42494373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994bc57050f907503dfe2d3bdb9114de6ff90c73af5b7c50a4a5b4e295eba3d2. 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/FR2X42494374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x156de1d34755b3572e03a485086487b97df3bef25970d676610888f672c695ce. 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/FR2X42494375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde08a046e80366b79583db090a955332a5943a5a7fd85354c09c1345ccd08d1b. 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/GBKPL1804821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0644fc5c1535503aedc953933de4c06e181fe03310fdad8c8902939a0c38f9d5. 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/GBKPL1804822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcada07239cd9bd12391a30018989fbd81f6bd5b75721b1c64ed2e88bd578dddf. 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/GBKPL1899254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf6d9cc94b0577b63910ecb11e86ee719df84dcdf6d16d0b02b46428a99ce1c. 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/GBKPL1804823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408a826122d025eef688f33b5d81a7d1a56a1e14a9f55e3d09cbc8857d9185b8. 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/NLN1H2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4770d8eb71ad511ac03d5036cf97955ef2e1def2aaf31e09e604d06c3ec5dc1d. 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/NLN1H2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1342ab780c3d898f9104abc0cb2aa4fe53e008e4f50695b1b91c8e3726466fb. 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/NLN1H2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29e39999c8e0b9f62f0dd5b835e0149fb1d357fdf74d9e178627076c1636cda. 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/NLN1H1900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46baadd16a5ec615f68c3010ac916e55f5fb4d2fb9650538184e9a4590496e52. 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/NLN1H2100034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f01b776e7caf303fe10e7a75bf51ce8589074ac766c782817de3ce3cf66de9. 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/NLN1H2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c35ea5d5d3680736e4c91582d0900fd4aa54f2681f74f8d5d1aefac21b2c568. 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/USGC61600654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7326e925b1b36f5e95c99e0e9500f2f4ced3bf79bc61bd8bc7eb9c8a98dfd06. 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/USGC61600655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a771ae50868cf5bb390d8596651d89e3e118ab7e1c3ac39e8dd30a3b422091. 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/FRU701800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x271337885fe219f6a9812f0ace061293b02335df4dddff0802840933dd0e0076. 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/QZS7J2382223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e81fbe9c3eada79879865bac1635e2c4c4481697f579ea2672b0133b3230489. 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/QZSYP2308517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x932b6935e0047288e70774d2d8b0ec3e41235a3792c203b193d1b35512dabd7f. 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/USGC61600605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc88c56aff7ede1d2ba0a42211dfd358e43810b92ae3418cf8ff14b2981f0a6. 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/USGC61600631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d529bdd8a037ca54597f44949cc9d13807d910f2c8cdb0ed1a63bfc683dcc3. 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/AUNE31800087.