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 0xbf0b1183ca8bc7d046d2b60d76455f28eab4cfc1a76a703e654b039ae8001bbc. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c81d6391-b548-4ffa-b9bc-24f21265c162.json and https://artists.proofprofile.net/proofs/artist/c81d6391-b548-4ffa-b9bc-24f21265c162.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 0x926bd3c754f43fe28f1abb9342a7f69156ddebca39afd07f22b2c970799d7946. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/JPPO01706925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ace563b88282aa3562b971cce079920d7267a4c40bb8b788fb6b9d79ebff421. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/JPPO01706926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ebbb7d4e66170700d5f00aabc6b6a1621637b0f3ff7785f457958f2efeed5c5. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/JPPO01706927.
イン・ア・センチメンタル・ムード
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6708b09c4d530a925eb169b89bcb1e12cfc8f039d3fb1f5a1cd0ffbb332419. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/JPPO01706930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dce1ca0a0ede15b725e56c1b7d9fc4097a50ef973bb1b0521f636adcce1aec4. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T16:04:08Z), 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/JPB622400063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf31ccb211057ddaedaf2fa77e5b47defae871281e99b4e8d2838a405c586157. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/JPB622400066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f1968aa4d6d40a9825fbfd3a457f4bfa1fe4f0b4410f646cfffc3bf8eb5377. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/JPB622400067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x334d8230e4b2042567986882488adf5633d9b0d8df7391295773d8613f84e96c. 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/JPB622400073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a97f790c1550007c806c4b725492a7fba31f24b067cc64f90523631a7b8377. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/JPB622502416.