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 0x1cf9a332f4127e732218fdfd20e673eb07d8866662d874f804bfa56026dfccc2. 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/d807c977-4b71-47e9-a6a7-54778ec3cdc3.json and https://artists.proofprofile.net/proofs/artist/d807c977-4b71-47e9-a6a7-54778ec3cdc3.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 0x9be1fb4d2dd87eecf07057155da6918a6f11606d0bb718aa2e77212ebb3e04a4. 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/DGA072189065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fdaa25966dc33eff8fed5a250cd1cf3e882eec48584646d11bf41ccf453acdd. 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/IT1O71300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5841e6c72787c9fa541c0e57e4cac149d805f6ae0c288e5d8a30b9356e487802. 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/IT1O71800382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0640c3261982fe2f1cda5424cd3382141cbcd2b834082ca367f630a072c2b76. 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/IT1O72000599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66562d34e28017f0989cfbe05020f9e49bfcd9491b7eb62f889dfb23c9b558c4. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/FRX452154315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa9f924fde5b8dbc9e9765d8425bfd897e91d1b4f42a8d27f59d5f06a2621b8. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/FRX452155082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef0534d31c8033d1b961d02f77e02464a321d3b791a239c748f5459a940761f. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FRX452155083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4623ba582df51f40408723c52ed5c32cbd55f2f82d478d10e76601ce8deda5e8. 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/FRX452155084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b94c1dc9109d1ad974a1f12f049e8fe065ad24a5c00b8b47301476da3dcd3b0. 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/FRX452155085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590b676b851bd134c4b7047a1b4cebb310fcfbc52e82dfc006ee6969570c64d4. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/FRX452155086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be1fb4d2dd87eecf07057155da6918a6f11606d0bb718aa2e77212ebb3e04a4. 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/DGA072189065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0fbd8559d005252e39dc864d0d63066d8f752029a36ad59ca05d551bfdea62. 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/FRX452155087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50dee8085a07eceeba857f5d3aa92f6e18572f2cc75833b6c4ea5d75aecf79f. 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/FR59R2113200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d4666d444fa6f9e1077f9caff1ea2a29ed2dccb0d400381cfe7908e66d01b2. 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/FRX202108620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf3736cd75bb4ca6ef6fe3bbaa4e129279892a566f83702c41b0cc6e561f1d2. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), 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/FR26V2088388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadfd0b758fd2145ea9d3241a7b15626b44c68f533467f1f44cbf00be6ffab572. 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/FRX872002285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1235c894c1e54783a127e1a5e8267c390006281aa1c792f4d2c71b3d30dc871. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/FRX452155088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1f9bb9d16ddb960207c7cf8584404efd65cba07c7f118ff78f7f3a26763efe. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/FRX452155089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ca746630b7bedc9b4b61b1d76d861d930f5d31a198800df43d8b3c9694bdf5. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FRX452155090.