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 0x20795ec5db0a30f289dde89986902deed39db4acc6b080e00ab1ca5efa04dd83. 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/0cc21cfa-bc17-4072-821c-79e60c85f464.json and https://artists.proofprofile.net/proofs/artist/0cc21cfa-bc17-4072-821c-79e60c85f464.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 0xdf7c7083c5edcda1ab67ef18e120b74a24d381822cfe05de49112220b68a5fdf. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/GX3Q92342927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4342554572841abe3a11f60a1073682430e0d46f19c707afa3840634e2865c16. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/GX3Q92364890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ecde2f943c0749c98a2862558acd83af5abdb1c816551bb6b065d39154e754. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GX3Q92389609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29d164a1bcbbeac4b9a2dc4cd30a18c24026c5b9eac831072eb7d7f6cde4f3e. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/GX3Q92389610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf85e42bb4423a426a92392730aa5cdfc6e57af9a693f76da1784b40acc06b5b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBLFP2344252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099bc6fa0cb8f96b589ff44ffde80cee57658eaf92e2f358605defcd296e462a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBLFP2355989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4945d0e980a9bd918ccc3b1a9fa5386e47ca5c53cb5c3eb4db8730f06b429a05. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/UKXN22300210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f8e77e2e18b6842c577730a2ad6531d6ec86494c6e0e2be92585748204fa9f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/UKXN22361155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd39d585fdc5136a64f6f0a87a5eecd4e52c0371fa1d76faa04f7ef1512a3a03. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/UKXN22325753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f7be13925cadba9af695423d7106917c104524d5cc3ba8139a4472104c44d2. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/UKXN22338096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1577aab80c22579093959d6d87074925ac786b46b26a65e8c33f12144fbc9ed. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/UKXN22361157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc0e5ee1b31b71d31494cdefbdfa0b510feb661d56300c8af38cf2a77928452. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/UKXN22361159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c58866b331717f2efbb1febb123f6a28e3ec0b75d6a086d1b78ec357a7c786. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/GBMA22303154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488bcda0ac8be4a98bb3fcb60e29151f04e3fc28ca0f6b70b222848f0f1f2cd8. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GX3Q92428142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8483226fec8a2b9b3c31355a1c7fcf7de9dc3b546d06395e3a17d3d72bfa3a7c. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/UKXN22477766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e17fda1efeb52f29380c3f0958db84dc97026054fe6e0b4c6724a4cb00a7358. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBMA22367205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff8cd9a3603069d62c0fd39026622e1a3d20a098e2f843715e261f28b30f43d9. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/GBLFP2571376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a75eb6b3c623742f20f4d1b4d0970d1fddcf22951c8271b922573874f06560. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBMA22594649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e92cbb63b953d23401705d8c78863087058b37d8a86a0c792197628928010f0. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/GXH2J2560900.