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 0xa0706c71318f89c14d2fdeef61d359ca20c2d7191d879adbaefd986f79915ea0. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b1e4da16-9377-4a38-952a-2f4d075d7409.json and https://artists.proofprofile.net/proofs/artist/b1e4da16-9377-4a38-952a-2f4d075d7409.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Nasgino Inage Nidayulenvi (It Started in the Woods)
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 0xafa8c9be52cc1d67ef43a1f012425dfdf6275214fc0e70ca6d6d33ee830acabb. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USF5B2400038.
Akisodane Yigatloyiga (I’m So Lonesome I Could Cry)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4822349d8f793f7a7bba7e5a3f341bd4c5d5691fea5a6003bd3943b1f81fed. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/USF5B2400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e3ab39e391e98a6bd62092b4dc8f41171612be2a27245217d2fef80190ed550. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USF5B2400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fbc95c0b9b50b0754613c2b0202ddadfcf40848ccaa19b73a37c22dfdc289d9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USF5B2400041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c501cf8d9631c11e692b2129496d051a4062c3eadf6b255fa77afe9b96d1fe. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USF5B2400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e457e069589081b35d382eb753e8e626f547a91c5dd59f72ecdabe608f9727. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USF5B2400043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8282b52aa7ce70439b4c9b517ff2c8229f3f9108aaee3a56ff0ece87f348abb. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USF5B2400044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b73ad9aed388cb76f5750835c7bab308e817a63809295468fec744207b4650a. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/USF5B2400045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb83f9886cca10e3e5d429eda9e4783c652d0c1c86712e12b49e3a65e7f8d81d9. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/USF5B2400046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c884be8a6d4765032e10e898aca412a42a29cb2d1801608cb2dd1fadb39196. Chain 2 (Bitcoin): anchored in block 958369 (2026-07-17T05:20:29Z), 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/USF5B2400047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf84e4a4a4d0dc7211b234005e5d4f7466c22e701e6c27b7bf3f86303bb7a87f. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USF5B2400048.