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 0x381716cf4cc6e3d1a6206da50b6f8751b7e029de7efde263726240fa0dc151aa. Chain 2 (Bitcoin): anchored in block 953780 (2026-06-15T12:02:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d5894900-d9a9-4308-9a37-de2830d85ff3.json and https://artists.proofprofile.net/proofs/artist/d5894900-d9a9-4308-9a37-de2830d85ff3.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 0x73f6dbb6d4ec53e844885d63cb272b183222d7d6e6ef1e31391db08c56bf19b2. 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/QMFME2379959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51687c85b52b4dd699569e7e4195396b517eced0e877e090b8c9e76aeb86cc9. 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/QM6P42304652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01344c4db8f1be914fd17e1622bec41268bc59680bf8175aa4a85d29ef6c73c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMDA72356030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487f4659814b31c6b30bd13c94561be508c44f6e110679d0ffe12fec951085db. 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/QMFME2343996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b8bea5a044d958886ad5075798d8cc09c58d5c60059c3d248a40d0ebd6ab76. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QMFME2379960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a668c076f17728ad6fee43ec62dc8cc5e78a372d90e7582d601288b79c330ec. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/QMFME2379961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c043dec4da384d7cf93e28833b1f2da7596f928975e0602fa700762096dc5e. 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/QMFME2379962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa952cc6bd31f9ad9d0c91a3da8c792f5b94ec607b961d1cd082eb07768ebd73. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QMFME2379963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b2f056986cfdff369c076960297a12279278abd5ecec956eaff7a8d744522d. 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/QMFME2379964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f4155847b4c5d9fbee153778483739c20067fa1a3b516fc868a6d5f6de3458. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/QM6P42401015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487f4659814b31c6b30bd13c94561be508c44f6e110679d0ffe12fec951085db. 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/QMFME2343996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01344c4db8f1be914fd17e1622bec41268bc59680bf8175aa4a85d29ef6c73c. 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/QMDA72356030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51687c85b52b4dd699569e7e4195396b517eced0e877e090b8c9e76aeb86cc9. 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/QM6P42304652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1139bd219348538e1b69fd01e91daeca00bedd12536c0550c2259499fa04fab8. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBLFP2174499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6225629704d5c749c3d93d40c096363200f406294abc9886f1eda0726884e3. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/GBLFP2071084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166277d2512b9f29e72d80abaaf45ec5e46facd222d1058cedb2ebadb242c23b. 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/GBLFP2107446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f8396f535873f9e72af968db4be0a10170391bec57c36799c0d8698c515946. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/UKXN21929123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d19029142883678001894f56072eff586435337134072b113534bcbcec6cbf. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBLFP2174501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166277d2512b9f29e72d80abaaf45ec5e46facd222d1058cedb2ebadb242c23b. 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/GBLFP2107446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6225629704d5c749c3d93d40c096363200f406294abc9886f1eda0726884e3. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/GBLFP2071084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe785d24cd54268fafd3f0a254011df20b9d8f700ea9f865b5184af0dd98dbff4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ESA011905954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b2ba317fcffb4d4fa0baf782ac5189743f1758e2efe87070035ad9ca15810c. 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/GBSMU6045712.