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 0xf2e857d018407e7e919776ead2031a0159bdb0da45a995352d9ca37163d76a2e. Chain 2 (Bitcoin): anchored in block 954043 (2026-06-17T04:15:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3fd96148-fbf5-4b72-947c-43775c85ae51.json and https://artists.proofprofile.net/proofs/artist/3fd96148-fbf5-4b72-947c-43775c85ae51.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 0x9e3f0be3158996b9e77b6a5aea52d8c83e5ab27e877383832c9ff9b23789c61a. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DEH742172131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6002d19546aeaf9b630655c9a57e51d20dc63943d80f782941b58052bf6711d. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DEH742172132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed41deab4c103447c146f9f1316e44d9093c3b278a0111764b6d46d57e29124. 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/DEH742172133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdadc36fb67f1fe219e4bf1f983144b0a6c38912f2ec1cd827f38f6c838d6a7f3. 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/QM42K2058675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a47a9be0efca2b3e3340ab03427087664594287f3ef96c735b3815284b79e19. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/CA5KR2006198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243c8ca34e4344a08478ceb14993c7dbe7c00eaeea6276d15d93f34c368ddcac. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/CA5KR2006199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c22c6e425a7c89a4e31bd548009f3e1e961ed67d91a940a9da7fec9c5f2c3f. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBKQU2002916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e99b4a4d8ef672f17848341635c58b5ede80acaa0f744f6673b2de25efa37dd. 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/DEH741719681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cee40ecd1a1a67f3c23dc76bd036f4f9cf88727cff483388a1da78a1df8d8b1. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/GBKQU2005060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4dca255c7f42e2e562f9a1da0d2effc287b616f7ab45bd0aa9ac1f6066995f. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/GBKQU2005061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd5411a67de8e6a8b45a8b35e6baaeb3e747aaa2f173c94a0dcb3e15586bf04. 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/GBKQU2005062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4ffab536246f8934c6c4648d672358ba8258be92fd00ab5eda7f82e4b8af17. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBKQU2005063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30aa58383adf2010c3e0e75cc9dc97afdd03fa5368d96fc6f9a29bc8bfdf08b6. 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/GBKQU2005064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d193e0f33d80435da820968c71de84953784fe9b4d225a7824cfdedac8e6bc. 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/GBKQU2005065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4311b5dcb0a53bb8a7e9c7d80320963a398b5d4c6a59bbfbe41e6fcb0d48efc. 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/GBKQU2005066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d342877f1d5a72b4207cc25c51f256b095153e6ca1f4a2e49fb67aab26e7db1. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/GBKQU2005067.
Weaver Various Artists Compilation Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799b8df9c379bca1f1783c784578b6aba8dd8332913e662b24e24292018acb50. 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/AUQ4M2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ea15b3fa6d76845fde5a7d36a0b3088e3d745836c33d7e71bd5d9602ee49c4. 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/AUQ4M2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf318a94c844f2deb89571b2e1e13661ce72d6095b5b40588ef54fb5c6cf443. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/AUQ4M2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd72f451af923abaadb07e72faef7fd9d39365d32ac57b1234556e1d52a5915. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/AUQ4M2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f7b4b9bd815209c9b555808949689562758811d669da301fc96f394cc3f551. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/AUQ4M2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bdb18b555614ce3bb764b4098f5da81b1609cd6eff3d515817ea06035b2a008. 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/AUQ4M2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e5721da49e83314e7c93ff970904d4c2d027d9195b18f9b1d8ea645b44f02c. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/AUQ4M2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbde1e2ae4c2657d0741d0e6793b9bc8ebfc77c50a147bd45da03963da478317. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/AUQ4M2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ac33e2db3f07394a15464251378a5b36eaa637b397009f5452bb4b5b484c39. 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/AUQ4M2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aaf9c13d379e91375ed04198c2a0ed0e42a884955de076cbb86506df3b18026. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/AUQ4M2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec757d073a303b56bfa69770f81388e679f9c19f3c897324a316effc9d2f5140. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DEH742230816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x017013b30e6cb2cf313e4b2ad7a986fc851d6528f6f75c08f97365247d5f9b17. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DEH742230817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91be0bc7d0e2e85019cbe4739a16c824b43f39bd5e6c557d08a29dc7bf8a8943. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/DEH742230818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f79bd66f9b4eab7bde546061057c4747f9ca5691e2bf23a4bcc24ab321b09b0. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/DEH742230819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb50833845265f40fc0f5f32200e1b3955aeef3ad49faa1b99e61268f46c887. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DEH742230821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57de788f04dd5d4e8ca490e3607e9e0b04f2d4ed78948090b4bcbf81762834a9. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/DEH742230824.