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 0x7a0d9dbcc5467caf95800d207a42ebaddbda9b060658003cec65e00b65da636b. 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/31a2ec96-364d-472c-bb41-bfdda8b6824d.json and https://artists.proofprofile.net/proofs/artist/31a2ec96-364d-472c-bb41-bfdda8b6824d.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 0x486754768d75dbb1498510b81ab1699fd5b4f6c6ae1ae4e0bb2f3baa4adf4903. 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/SEYOK1764895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c67e174d11cb83977e42824bfb3298dd52a2103944dbd757361b023f6e4a9da. 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/SEYOK1764896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f29675625b7a6a73d25e9228bb79f586a567d92d4c79f1c993637e588e753f. 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/SEYOK1764897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259cddd077bf893867ec517e28d8e9ebe4abe8377cec4a7baad2f8a0304ee3d0. 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/SEYOK1764898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42222fcf8a7a29715dacb9aa8c58463c76eab37eb3f026430b73d2d83f818b9e. 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/SEYOK1764899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc18806a28ac78f40128aed1d377a414453d15e98005de076f8590c6b033fae. 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/SEYOK1764901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa65697ae96b458fd9657c4d867510562c319a37c7a841c190ccc01905222ff55. 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/SEYOK1764902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ba7b7058b25556636424700fd7653d413584bf7c34333712262e4d52793fac. 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/SEYOK1764904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987473a7619cd1c3038aa703243423bae5d03d645119f03b43dbba0e0e8ed365. 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/SEYOK1764905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x769975acd2a6ac9da5a62da03adde0673747121bc5b2fb5742b5185efc5bafd9. 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/USCGJ1607604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35b445d4f9e864bafdd25252745f9bf47b499edece104231d32e5e45db96c71. 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/USCGJ1607605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x997fe6cb606dfa1ed5cbc10e000d8426819e139336871421fafbbc6dad3120f9. 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/USCGJ1607606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381047536b48ac0cf1e94719cb949652ba87e04923494531f89edde16a432ca9. 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/USCGJ1607607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec5cf40e4e4660d2e5225832f73538f432048bb0fcf66f9fc1a9daa59f9824e3. 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/USCGJ1607608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6513335928d98e0b24f0d7fbe04a08e01853667fca4c58bb537851d14a50c9ed. 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/USCGJ1607610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77388beeb568c98e7bd7c247b473ccdb7c9d010a96c508b290b219adead8f7cf. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/USCGJ1607612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32fa2bb1735c289959e7f10b4ca7a108477dbdcc028240bfbfa3dcbc3b20719. 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/USDHM1711011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a2a36ad945d995a5a908ac33dc27ff60017db078f682f603627dc152fe60a0. 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/USDHM1701902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x100c4a395625512b08bb30856b0523a158c4fa9049ae146771f82cd0b8497045. 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/USDHM1701903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3655cd2f3ebef162a24567df230bc54388675290f359318dca27548b085d7b9. 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/USDHM1701905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47757ff5e201299edbdcd53d2714f4b708ebd820403d8adbcb402bc7e9e31994. 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/USDHM1701906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871bf2a9940679ddaecb35e9ea77f764491438ec641ec21b7874b1c280c3fefd. 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/USDHM1701907.