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 0xcb25cdb33a6e858ba345476e506a5d29a020c7d1d5c0712948802b54176737d3. 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/6bfd29d3-e564-461f-a5f1-bc8b8f6c83dd.json and https://artists.proofprofile.net/proofs/artist/6bfd29d3-e564-461f-a5f1-bc8b8f6c83dd.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 0x4289652d7507eb7a29adbbd780043ceb52b8c09bfbc3ac08291f2f8d7b29f07c. 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/QZTAW2338322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28755081edd18f9de23b565659b21eb4f6972d8c76ba0d3a67e398cf37b68062. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/QZFZ32449796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15025fa0fc93b85cbe8896edc73b33e7b92f06d525d41c360c3263022348ce7. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZFZ32449797.
into your hands + preserve me - instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a91e34c4e76452e286ee3c52fb4ffddc279626152be3a22ffc68bcd6bb4d9bd. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZFZ32449798.
pleasing in your eyes + it's all for you - instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49a0f812df49acbca3c3e3818edaa91aa6bef7b761c4385e517888c8abcb774. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZFZ32449800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2afaf8d2e6ed3044dd3ccff8745fb44347e1b6b5dcba5339631cbedcb355901a. 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/QZWFP2303751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac8e4410f892cd4e692c706b28567f1ba1ded6aa4d4ff413fec171a6b543b3a. 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/QZWFP2303752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21a9f1b758e5e8ee4d7bc39c65e480025edda95731a16367c9c68f789a8fb5e. 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/QZWFP2303753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f660f26b7aec84ca78ba551e2feb63207116a8d660c067f3583d284f902610e. 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/QZWFP2303754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e1572138ae52bbb791ab38f3cac87acedea1e5c5b5aad3f78fd00ce5550876. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/QZWFP2303755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x842a2cfaaa0719701634027bbf26966c8bef600cbc0ad3e1d550226705e18732. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZTAW2371911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33ceeb364e5ec8f73d082030ae592382d0ffe8ac0f5f9a72970d4711751961f. 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/QZNWY2307448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecaef282b686ccc23eda8f5e344c23de2960fe729bdd671f96d9b1bbec431a64. 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/QZNWX2067841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff7413fb411c82cfdc2b37da04fa8cfc16926c1235e6e9134c7c1cc39eeaf9f5. 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/USLZJ2159987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f85eda0de40ad95caede6cedce66bc9300386c2cb51914c275c306c5a8bb8c. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZTAT2314113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecae18d4fd5582f593e02ac687d4f49cf23d0fcb65b9c3aa9ce49f38296dbefb. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZHN52496514.