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 0x9a9214fe36de145da3e3d10ec4b0b9ae22ccd788b75f6a4a290dcbd46551def7. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cb3eb5a0-ca36-461b-9798-e513f157e1ea.json and https://artists.proofprofile.net/proofs/artist/cb3eb5a0-ca36-461b-9798-e513f157e1ea.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 0xd51fb1fc7d7ce84b03e31ff11cdf90ac18dbd3695ef69c17ae5cc3275a455940. 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/TCJPB2449149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a53842745d0a64720743884b4fe0a2a2f575fef871d455df4c59a66404dd95. 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/JPS802355085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91dbf6199495be65a5aed03781c262888a26c2b5667e86f5f938be8e7e8bab48. 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/JPS802355086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d749ac0eaa93af3784ae3fa4bf01462d8af1eb4e0e244d0f9304ba84fb8f3a4. 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/JPS802355087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847af1dde194df6ca9605f9e0cc6c7a41307daf74294c7991adc0bd008f75373. 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/JPS802355088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728b6e9b58e93fe4b912dd3300dfdd59dc462f45c305914fefb0d944279841a1. 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/JPS802355089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401791ba65d6fbd41a04c145f362cbcaca7f757e1de2509aeb0f1beb1ae6d1a5. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/TCJPX2314023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd240774947817040e552fcfd4198c8cf6b5f7dc0b4f91b37eea111240ffea4. 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/TCJPU2390323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976ab46ff21608431f73c0d971c36ff8dcc01e580cae175e3d811d2aaf2c595d. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/JPB602303453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc0f821fe9ee4d67dbd940b919cbfa556df9c6c3d1e75e51077d44a1323090a. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/JPB602303454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4726f933161ae79a80b77c775288abb042af7cde3a1da70d52a2476a0e3b73da. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/JPB602303455.
いちごミルク - おるうぇーずねむり Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88dbd049888f515ae156613cf50f4cd309167d695aabc7b0cf1b1d6716fbe81. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/JPB602303457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6853afad30f446ff4da32a05872dcfc2b5d8336c8533212d96f9815e671b5f. 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/JPB602303458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa4f9b658f381e847fc2c7fe18c5db3cf1f799b52e83215950724650e959b731. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPB602303459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ac1ee4a8bef6343203647958ccd478eefb1c53b8ef31e9ff2f0e10c05a310c. 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/JPS802353377.