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 0xc3d85c066693ad3106877c94c78dcd904e78a3c726b408abbb500dd92d7d23c7. 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/ebf1159f-8ec5-471c-a60d-7c25208fc336.json and https://artists.proofprofile.net/proofs/artist/ebf1159f-8ec5-471c-a60d-7c25208fc336.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 0x10aee1c17f6dfada6f35d8c1f35e9bbd31a106beb73f17a0063e25984f23feb5. 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/QZTB42302851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c498012a5bfc0f627dc915998f665cceed6e0267e312ed42a58dba1e123356d. 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/QZHNB2398826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794280d94ef64dc84ed35f56a4abe871d474b2e883e8bf5c6a2caa48bc959b8e. 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/QZHN72222341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8955931b51a77c90623883d3a24cc181e46999209f923ba657958744688f187e. 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/QZTAZ2384320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f56f9d9d8f37c66b967c475fdb0294bc3f7cf7d80873e7529c067c6f8d2e4e. 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/QZTB42302852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c1f05d04cfe1f96f2247ccf16ed8a8231cc7e13a8667836c93cb1f0ae0bf61. 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/QZTAZ2382250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576c9002d082f489c71ae799f06b9c30885687319c9332d55c351424b6b8f96d. 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/QZTB42302853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e0d6cbf11b5cf9f19aa2d36d53e5ce08f023f7e3dd1dc9795aca90a465e546. 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/QZTB42302854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca616fb90e676244b13d71b66d945b8a466647584cd89853627aefb277e6cdfe. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/LTF952400005.
pramanai (elektronische punk version 1978)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c1ed10907a3ef4982ea290ae651df26fb5a055f3ffe2d5176b5c8bc614cfcd. 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/QZWFJ2336917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c1f05d04cfe1f96f2247ccf16ed8a8231cc7e13a8667836c93cb1f0ae0bf61. 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/QZTAZ2382250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8955931b51a77c90623883d3a24cc181e46999209f923ba657958744688f187e. 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/QZTAZ2384320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c498012a5bfc0f627dc915998f665cceed6e0267e312ed42a58dba1e123356d. 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/QZHNB2398826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794280d94ef64dc84ed35f56a4abe871d474b2e883e8bf5c6a2caa48bc959b8e. 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/QZHN72222341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca616fb90e676244b13d71b66d945b8a466647584cd89853627aefb277e6cdfe. 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/LTF952400005.