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 0x3a7b73a2c3821847c7e33149f2f0df2ef5fb512b1c8a5bde89be897fec3df146. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/98472858-4d0d-403e-bf1d-e14f0dbbe97a.json and https://artists.proofprofile.net/proofs/artist/98472858-4d0d-403e-bf1d-e14f0dbbe97a.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 0xea8adc0b08e0c31707430b1eb818e6d34bae05eb07472212187eb53f5b56318d. 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/TWV150700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7fd18812731407b5c3fd642354af07aae71c7a0920696669b1114a5b0a8bb9b. 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/TWQ131000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff35ebcf39c677e93c251bff76a1c29ceb9201a7c00d4dfd46f7afe8d45f6290. 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/TWQ131000002.
Dear John (愛的記憶竟是如此美好 徐千秀重混版)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d98f13090f74b74db16e96e94560d65ff350de824021cc659e96a04bdf41687. 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/TWV151400002.
少年的最後旅行 (10th Anniversary Remastered Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c71a7abea2b846c73122e70247c63b794a79544291994f20f95ffd3fb38a73. 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/TWV152100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f2054ab2c65af93548878a0dd497a1c65598d36baff05f791fa6d5b0085f35. 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/TWV152100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c63fc766e9864a0070877683a84d3353fefc0d42ca17ce6bfce3b4e23797ec. 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/TWV152100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a9d4442d9a83198d8f30675fd94f1cea4c9f85cf21d00d5ac05f4b9fae0a44a. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TWCC32421111.