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 0xecb8d557c1923251ba7205616519b3041be8762fe13be9e247795c777168a6ed. 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/e0d29d25-41d2-438d-891c-eb00c97295dc.json and https://artists.proofprofile.net/proofs/artist/e0d29d25-41d2-438d-891c-eb00c97295dc.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 0xeb54bad674288d79ab6980abc7d08971244c2c646f767a7434fc5a5212de23f0. 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/GB7NR2369501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b27ad0fbac75dda6701b4efc7aba96fe838218e2a0e2727baeb9169399428fa. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/GB7NR2369502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7be7ea6829f26c30ef80b2f3f2f31b2fe830f7f7d221294f28b21c752a0f1b. 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/GB7NR2369503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75dafecb78ef2ae8b97100d10f83771a7cafe9a7c9e8567194fd04f9cae931de. 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/GB7NR2369504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17abe04c3cba1a47ea17d0f723febd6153ba27b9caf0b6bc72069167e4c9fdfa. 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/GBPQS2200112.
Give It To Them - Dilby Extended 2022 Rework
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8ab9a9191d1dd92ece1bf6ab49b836b41e989d4c147cada69f69f6fc23313e. 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/GBPQS2200111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0204361a0775083caa98ed110d15df03b6125d6b7fc6a775bcae830238fc961. 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/AUVC02495910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9350faece40a75725f5083b56f13fe99393b8fdca6a8f394d2a3e1c4e0399194. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/DERN42300121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d2817394f2ee026515a988da39fedccc9b038da26e7d45d8a35c2a452e91aa7. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DERN42100291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4a7b792d206d45199da95796186f112c40b7cea4a55cfb2eb0f13f96a436ab0. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/DERN42300122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55940343d53493c3f611f1ffed1cf1be8673c06727bdb75a3908e5b62498b59. 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/DGA052317074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a8f3c6866bf680147c6ad51b3e373c207cddab5eda892ac06cb3419c3367e3. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DGA052317075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438815cde570f84dcfe71ce3028843775e1a2a6dc4c42339c437c3d1ef0fac04. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/FRDKW2300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36be2c7740c375f2e06a20e0b1462e9e5dbdb49e882cbb499852074aa8832e1. 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/DEY472081296.
Connect the Dots - Oliver Schories & Gorge Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c4bce2e90e38c37afb3deb48229f5ea8a20f9a31b3aba0983ed8c456a11db7. 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/DEY472272931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a3c54986e57ef8300004b1f7fdb28f692c0ba5759e455de932e9a44fd12b983. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEH741809054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0501e6c46c80a0c035646aac56502ff2025a488e0d584b6caec9337b5f47eca. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEH741809055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ef0de2eb79c11f33175791cfbc3fc34926920d5dfe2f04c38aeed7ac4f6483. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/DEH741809057.