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 0x63e7471ee148f81db3fcd6ed40a9e2195f0e26d971a48c50af15142a6fa86606. 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/57d7ed97-84cc-4fda-9712-b1dee90b2ef6.json and https://artists.proofprofile.net/proofs/artist/57d7ed97-84cc-4fda-9712-b1dee90b2ef6.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 0x6d8da8880580c0e5fca55617f6b0ca16ca20aac0be5f5dbc6843ecec33911ade. 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/ARRG11800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb162cfd34473059b654362a8d1a7c5a64d37ba5e657f52f941a6a33a3475a506. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/ARRG12000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33eb0c27ccfce800e37cd7b6d91e46b29b764df0302207c4e58d9f28bbe3cb6a. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/ARRG12100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b52e9ac3a883312fae07191ca6eef80a48e5eef0edf236a2c4cf3e4e57163a. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/ARRG12100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cbbc7e6b651b0f581e26000ccf94b9d7c50111ce02b39f829a3cb7822fb5159. 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/ARRG12100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132644325aad232e107ca0cd15376850295507773f2070e53a48916be4a9d208. 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/GX5MX2178695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd678d66efd8be52670dde785bc97290919c73804de2b2343cf0c1766c3a04db7. 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/GX5MX2178696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad18b6946f95532eeaae184c214b17372de59b13857945420e61522cb20680a. 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/GX5MX2178697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47754189183e94f602fdd64e333dab978bc5ac2ba0a6ff29a14228c23cd66da4. 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/GX5MX2178698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78c5ae46088e69e8c9c5df6b6c97813dfee906ea3487da573c752938eb93662. 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/GX5MX2178699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d9cc01cd4b7287ef2f0e9f80eb974c66a21b7fad9caf99b073d1ec8f3b9d53. 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/GX5MX2178700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53549464999e35b8e730c669c19912ea943fa70f3200ba44dc8a2f3640a1ec81. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/GX5MX2178701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204f0ae7c39202c53d4f512d4ef9cf9da2391c17176697581b8c0663f3437c78. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/GX5MX2178702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8384b4cea347edfeaef87091548c5bcf8bcb1d7df6cf9f8dc269a6972c38ce5f. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/GX5MX2178703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f07c087ea3519988514851524b1051accb383980f4d09e4f7b44314392fc669. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/GX5MX2178704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5e90b1bd6d1086e0968d21b09ea4795bf597c09f0c17dc77a1d4c5648932b5. 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/GX5MX2178705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f4db536e8e043d476b8590a771124a8672cdbd074df66c95c31ca3262cda095. 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/GX5MX2178706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30f05879a20a98ec77571298ddbbf61695aa2bb940a1592607aa3d62a1ecf97. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/GX5MX2178707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd366b9d7a7c589736725cb00bc1f49c3069521f4dc3e72fc6ee6b64e015c6a. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GX5MX2178708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a051e76240465a671034defc5ce18d244ed6115047daa91d32fe078d5af037. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GX5MX2178709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x982e7a311026ad42a6b3720e504fd9e14a545c07075427650167d50c14789835. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/GX5MX2178720.