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 0xb906434ab90c581840a36ec83447dc6bddeb8a698f1a25a528d409a50f70cbb7. 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/1ea9aeb2-c366-4d95-aa3f-247348521094.json and https://artists.proofprofile.net/proofs/artist/1ea9aeb2-c366-4d95-aa3f-247348521094.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 0x6e5e121a2df6dc3d8a67925cc6b05c793c66618ff34c4455a53519af619923d6. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/BRRGE1200346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcabcb63f5a5fb33483f6cc914b0672718f70a1fc8dd9d2f89479473c67e66a2a. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/BRRGE1300088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f96b6b14eaecd3e0015d1471fd57c3a955b9a184106aaccd0ee6f47aacddebc. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/BRRGE1403634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f215d171338ea07420a35a133e474b4eb3b83d3ae3befcc4f9e90710049b37. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/BRRGE1403628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf015d9c121f300e49952c94aa3ee36a7d8f92eb181c54a7457aee20a4fd64f2. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/BRRGE1403641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa3ad5df7184ceef6a3f4d1fc7c90486c6442ca4127115fccb2d3f97f2fc05d. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/BRRGE1403635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1b8bc703967483c6598682ef5afd4644d833a6b7a5d0d2df6c51be7a3e79095. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/BRRGE1403637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c68e5ca66a060ae1c1a4b5a94ea4645d12cc0238310fa4b42e6f5b39f19890. 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/PT2D22400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541168fc70843900443c2eb89c6708bf2c73ab26479ead9bfce8a66cffbe8a6c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/PT2D22400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3ad7878673a420b360a78187fa18fe729ba4ef2c8fbe53f76117179465c9ca. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/PT2D22400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2a56f78701b129fdaa281ac55c5015a6c9b8b41404ed0e4df7d87ca8d7e4930. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/PT2D22400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c088ba1321559ef42758f999eb81930dc633f95aafb1d243b4f2ca820a9faae. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/PT2D22400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91a7ddcc274a3fa8a4797bbf419e795ccf2f58ca54e3ff2f5d89674f62f8f2f. 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/BRRGE2200862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4d9ad55c6108cb3673c210cc77dd464fb6a87bcd55e89264225be4d0c4107f. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/BRRGE1200345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf015d9c121f300e49952c94aa3ee36a7d8f92eb181c54a7457aee20a4fd64f2. 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/BRRGE1403641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa245af4e7ed5ed0299bc2fceeaeb773a6c19548507e99279887ae99e9a0c6f. 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/DEZC62104576.