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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08aa5b6433d3b8c95f560d3532d6aa1b236309fd25f14d06ac12fe3668a3b191. 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/cf643b4c-3920-47ee-a408-90776ad059aa.json and https://artists.proofprofile.net/proofs/artist/cf643b4c-3920-47ee-a408-90776ad059aa.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x797d91dda79ea51a378dcf39faac38c2859458f2853614941bccec7244316752. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNJV2415514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc7212b0b9a75c46f1faac0dff4d04ec1b3e94907b80600224ef268cc21d59b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BXIV82465787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ea6e8413992afb36528c44800aed25eae2d3d144682a021986718f4e664c9e. 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/QZNJV2460474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb498ce1d9daf49b678440e5f2bebb901c2ff8f465a9f22cb12cf38695db74bfa. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BXKG22401388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85bd6186d60d734cd9560c5c9f1fa1755cb2dcdc7fb59a3f32c40f852b39f95c. 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/BXG6R2400196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8258550b13e94d18e4f75be205c5fbdcabb95ebf7707133960a6affe1d19f549. 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/BK4442400088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e41a4a760ac701f75d898274287df726e51568a3f3a9e4b22c1d9de101de39b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GXD7G2401156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f74c80322a0af89cecbe8ee0ff1a1b0116348a8020e3e36a43f4c0a9dd69a21. 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/BK4442500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e164da3a303fff1186a81893e8221577a4a299530b710af00e18dbae32710f9. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/BCIH82404181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb8722d2ff65e76ed420c62f3c5104789682c887877c95920a8830fae266d91. 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/BKJH72500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aba7e35f8152119f633d3eca44047a46692a833f9f2b8851e7cb596ea755f2e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-22T01:27:54Z), 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/QZGLM2519895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51df62fbb998d43a9a36f1b4d8d1d5d2516a06d1ef90b2a844ba616c37a6576f. 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/BK4442400440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8f7dbd3a4c116ad214461878668ceb248f350c540a6dd12aa5011de1d7fcce. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZZEB2416158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3890cc641f0e2d18bde8304a9debd9262c461f8b4e48c78eec73ca0828f946. 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/BK16P2400519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8261c351d089b73b8d15a4ac10e46588cb7ce4baadbd18f0b2b18592f9fe7706. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BKSAI2400144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7171670b3316fcb1d1868d31c90c6b3d0e8ae22c2d42ca12a623d18b0c017d41. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BKSAI2400143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef5d2ea2835f2a607121b49062f63510b19616e38ade9f8fb9dc14f2280d53c. 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/QZW9M2213623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686d2afc42712575c31bb6e2594bf0b6991bf6230b2a1cdf0ddcc2e80feaf181. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BCIH82100661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0885dfad121daeb38b34e76b455a05037cb3b29a65a83aff9cca1ec9e15376c0. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-21T17:27:11Z), 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/BXG6R2300969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b788b62eaa35ed8a1d506d66cd419a539151e228a3a8f5baf1af007e371fa45. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZTRX2444698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8505a1709ad8527c60b1dff607acb2492d3ef5824ef0f10cd626c5e47985aec. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BC3PG2331077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab89794f56944d8be94253d640534b66c2a6c5b1708d71d342499d3e81d8b1f1. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZWV32310425.
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 0x56dab4a82c62820ba02ead6d93dc6d92e5ea21ecbe6c4b45d35e25b7b12f947a. 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/BXKG22300309.