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 0xdf06806455a8fedd8935821d491054d78795657792d719ce1e7ed92965946334. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/99ae9870-3efc-4c83-93f8-3660e4f069f2.json and https://artists.proofprofile.net/proofs/artist/99ae9870-3efc-4c83-93f8-3660e4f069f2.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 0xec6c57b73fe816c8cbac6b60677edbc0ea133b07e0baced44380e511782f25d6. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/QM6P42498726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7103fa792f85b243fdcd1b8f8ee3a39e52e62d86caf8199d7222c7fe8d13c5c2. 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/QM4TX2485189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92266871b9489e9c9ace974432d85c74c9b0019d633f2f17a0b532d6bf6b553c. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/GBLFP2349220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f685747760619b427982dc8981a5c13fb5346ab309377dc2cc0b2dc2f1c3e5. 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/GX3Q92326566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb681fcbecd89afbf34d380c20fcf42fa3e59fa6cce15cc20f2c3e0185d39fc53. 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/UKXN22250367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0039aad4c85594ac25243833a3bb7c7037ed2185320f42738726747f09daa7e. Chain 2 (Bitcoin): anchored in block 960231 (2026-07-30T08:33:28Z), 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/GBLFP2297644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf1bc06ae98ae67e4c98c4945cc0630776c91894efc261a91f7a6e414e6b765. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/GBLFP2273382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1ad1a5b89f34f596a06a2cb5fe45563b4ed2bcab3dadfea6279b6ff80c4473. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/GBLFP2228414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f0636cf3b3dc663c3c1906373186c3014231856f8ea9161891ecd0b9c75c37. 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/GBLFP2206451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x069329c517e5acd2af2b5cca556632238200a592983de2970d74b08a5ba611df. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/GX53U2075370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a7c16c20ee1c0bc8b3b65cb03f2c06f2a7577aad5e66964527e06c40db50e7. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GX3Q92198302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130d2f886118db511b58bfd5f5e10497b053747cd1fe462091cebe9300d5504a. 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/GX3Q92126870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30322e62babe4d2f0c99cc03527aa5822fe9015cdc9659b0739a3017125236ba. Chain 2 (Bitcoin): anchored in block 960355 (2026-07-31T05:49:18Z), 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/FR59R2133296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dec9de7a221c2ebaeea021971df133971544dc4431c54bca9953d2221dcd083. 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/FR2X42121665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08125823e012f1b000fc21e34234604644425c4a534c50fc523eed53bdba1e00. 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/FR2X42121606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfebff57285f273328f0b1316cafea52aca324aa5d1e6603902200f6f482bf7e3. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/FR59R2133297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c723b8b725566859509042219550b904e9e34c2d4fa52fd6b0af994d0fc234. 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/GX53U2097091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee80190925270dc66598dafe47186728e6d330be72d13b5d7e0496f73328d18a. 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/FR96X2128760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe574d89822767f73f252e5ed8b36986430227ca928c3d48f24954c9c4e8b6d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FR96X2128722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40b0fdbe411e02b4c46488da9bd4d17e0c8cce8092457530436510ce0acf460. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/FRX202152744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa012beb0e727c5f40b6ed44887d55c1d12fb292c4d1b60079fee8d25584d0e99. 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/FRX202152745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf768f0cfd3d745cd891c6fb2cf5bc3539a4b098928df02ed9fcb3ad8154458f. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/FRX202152746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8784571d3b1f5fed90288be1edc7c675336b5bfb4fbb3952ada4ef4f81b8fa3d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FRX282177594.