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 0x719df464dd14b06078f7abf54fd8b4dc297e63d5615ac9af0b42a36d01c9d565. 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/cffa2d70-e605-4022-9e27-bc1f861dfddd.json and https://artists.proofprofile.net/proofs/artist/cffa2d70-e605-4022-9e27-bc1f861dfddd.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 0xb419167d14c31769224632edeef88d8fc047999d81281de0c6b2c04c2c29a2cc. 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/HKE672500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe4fed36316a943896f51ad5cb3acfe0aef33b40bf1c49aee03f3387dd44d9b. 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/HKE672401537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd29dfe5a0635396bd98295fc3d69c78cfab7771ddf624036cf1774687900622. 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/TWU711906368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6626b432ac0c0afea7f6ffcda2b2d06011ffbf9c7827d29ad5219df15231f495. 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/TWU712305643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf6e2302f0efef0dcda10fe9c355cdecf00924e2a8ed092db519f0c97ad647bb. 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/TWU712304305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe62167e75f0068f0f18e72d31ce195a4daf172615352f9bcf95114fc3d448661. 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/TWU712302328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161dc2beb420300d4b06b337c3c8f281fb2abf02660f44c42e6c3bb1359abfa0. 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/TWU712300827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3923e8a6ea428150efeaefdbe722767e3b56f5a8ba6e46da05de00ebc8dfa981. 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/TWU712300383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e10ac1f7e8652a3d2f3657cec73d5683cc32a4a858548dede1b1ec70bc34c9. 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/TWU712205883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45fac94ee9918b6ea2c3fb4e06fbf2424c2d00218d1cebaeb037f99c5ed6ebf6. 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/TWU712205970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x174270d12de1a381a761ddb671a5302ef0282a854ed36900e180c4fdb3370efb. 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/TWU712206116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22231ec72575c1ee2d76c0b3956fbe60ac364bda209754256f154cefee11828a. 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/TWU712206117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf6cf31e0984411b3e8479cdd57b527b76c92a21f365e61cff38a1e671eb0c26. 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/TWU712206115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88200432f583983b99fd087d266314815127f256a1ff4fabe896b1a20ecc1ba3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:22:44Z), 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/TWU712206118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9883a983c4fe13293418dfd86098895a7bc44c27a8a609be7db3a0cb173746a6. 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/TWU712106180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e127ee5842cc59dd5e529619ed216dd037c239284fa98b0d08578c968e501e5. 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/HKE672401603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150254e6d9f27a18575e1e99899bf59e4503117044abf531bfa25d40ce268dcb. 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/TWU712106200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ddbf933e611602e3929732c4ba5310cd8f0130c9efc70516407cfe6187a63ea. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:19:51Z), 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/TWU712106201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a602b35208e15f942aaeb6ec7213b42d809697b4e180d9f36c50424bad9c42. 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/TWU712106202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d59e9d5355e9429f197c0abbe1f11c01d1bbdc56461fd681da8b9e749fb0fcf. 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/TWU712005633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f1c018c2717b315f9053d003174fcf93b248710fdaf1322001faec748f1697f. 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/TWU712003983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3993adbc27723d808aeed030f9779f401ebe945a6bc72b155e7cf1a81d31db93. 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/TWU712005632.