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 0xaad5d2061190ba6f4c4f95576c6c78a1b475a3a712c9fdeaa695abce300aa56d. 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/f15d1a89-1ee9-411c-bb3e-3b062e691cc2.json and https://artists.proofprofile.net/proofs/artist/f15d1a89-1ee9-411c-bb3e-3b062e691cc2.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 0x68eea4675bac88d105bc3b94800678f229b004985b9e2aabd038ec91cf66bfed. 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/DEE862300554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6baef6f637b0f01129c1741f5bdfb0bc4d13d29b9ed51f23dcb4b6dec7889b1. 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/QM4TW2441431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841985839cd13970bc812d958d80227047552ce474fbfc9ccd7a17ef14cea57e. 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/QM6N22283472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d81c44b4781722cfce8778922aca84fc458af73bafc5b36e5b7c022902b0e7. 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/QMFME2103448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x015732cfb1fbf2851f71929821328c4f251330acee899a2554e9f644ba8d5ed9. 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/QMBZ92101148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39cda7c3f2ff984a07efe3ce2f7f76d65c71319fc0de12f4202685077731b8c. 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/QM6N22410950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40922ae0e2991c6e5cdc368c9d7394838b2216c36ddf4075d524101ec5651133. 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/GX8LD2448262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa53cb03ccfd75c6288f19d21f3b2554bf53869125240abfb18147c4c85f74d. 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/QM4TW2408312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659743533b95bf124f33cb40717f557a5e414367fbc39670bdd2207328b0e619. 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/QMFMG2348269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94532d0e0f06ddaa03683f067e32f6ff129c21e124471363991ced543c599304. 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/QMBZ92320303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02411f509c01f50dd7e18aef153408fbf91af7bf706a5cfab33e0c3d88a56ead. 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/QM4TW2372914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be545720590c5cb0f45aa48b226567a7cde99e1658958dbdfa612128ca8bcd5. 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/QMFME2224356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb7718f1949b36140650f85e7d85912b1051bbfd015c3d9809f7f80d0e66336. 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/QMDA72220689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c48e26892ad41d066eb8dd58568443025591a8143f58d0095ed58a4f8fa598c. 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/QM4TX2200774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2214f1f466d0915866d55b6c5e6a858e9e9f0ca50405b2929c17dd301abba92c. 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/QM4TW2216668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd057e52f58a2506a188d876b5dda795eef59c8e88b9d5e9d44ae5572da5c2b1c. 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/QMDA72139281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f008379cf3a3a8177a2a17214a94eaf430c58c85c697f3234e93a6b4ab13c2. 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/QM6N22116278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11fcc4ffeb4edada0ef8c5f3d8fbcd6aed7fb224f9609cb7cc7a640b73d84f9b. 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/QM4TX2124159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb219386e32b5968d645f6d1692c0a41a9d4c5d5c79fb3b02cd51b7ef17e8ffca. 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/QM4TW2169131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdceb1bf5167ca9a03b3ac87ac4da3d71245eb522debab044c96cf32ff45bf9d9. 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/QMFME2012473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15509dc6d9e1c36b983ec1314c1f5b83c7284899aebd49e4e0ef284ce5ec12be. 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/TCAFB2088675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca22128e0e628d65d798a6f75a1185cd870a7f0eb5adc851b7d9e3c0baed1aec. 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/TCAFA2095741.