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 0xdbada5dd4b9eafacdcdcd7db9fc80b095b9aaf9b5a2921343b04573710f8c76f. 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/11cb51e3-578d-42e7-8733-ad7d9532149a.json and https://artists.proofprofile.net/proofs/artist/11cb51e3-578d-42e7-8733-ad7d9532149a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
心斎橋 (アメリカ経由) NANKAI [feat. 虎丸笑万 (CV : Lico), 飴村音凛 (CV : Noa), 東海林桃々子 (CV : Mone)]
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 0xbb2d385fb29e7bad2bdb617c98122ea12f01ba5ddd2aead2643465cfd1c99d19. 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/JPH492418020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9fc92b359b155d3b77bf9ae84a2d627c00ba7d331a2e7b39e9d083af4fc5956. 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/JPH492418016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb032ecc7db53769c3b80b541cf67d6838b48573469d60f6724f91a9cb44e5a2. 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/JPH492500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45636eee80ab01d02053cb7b3370dc1c24abade3ade0d7bb503aef102abb3388. 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/JPH492500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d45cf7d4be2cfbc86f7be6e928d55b19870fec517d7529ca4ac0e46e86f0401. 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/JPH492400126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57be6aaae2b62660c113ab9737c5e10454fcf5944f6cd4f5a80f7b411e0d4327. 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/JPH492400121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f3ab1862e2aa70199f9053b38252fec8c2130b689fe41462a322f839661e62. 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/JPH492400122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b65d9fd74b911671bf0ef55cf19d8cd7717a7b89e51e5067e699ad0a62c573. 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/JPH492400117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0aa55cdf623fa9ad5297272c9e31495abb725708bf7fff3fca439411bccc98f. 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/JPH492400101.
心斎橋 (アメリカ経由) NANKAI [feat. 虎丸笑万 (CV : Lico), 飴村音凛 (CV : Noa), 東海林桃々子 (CV : Mone)] [Instrumental]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50aeebf75979b8d4c277c67fda66aff8145f883db32382629c75abd90bfdb63f. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/JPH492418021.
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 0xe0b6029ab565b37c73a6f50cf7d390ed62ec47efa8b810eedcdb0ea95971def0. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/JPH492418017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf99fb89af5ef52d987349eac239600c0e9f4c308c6ccb1fea7e508659e452df. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/JPH492400127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6fb3d1c4cc08c89cbabad520c4f1aa90052283b538dd7262ad4c3366afd8ef. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/JPH492400118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdccb8eae521179e3837650ab1bad97d99ae41df6dd3330a9dd85c5eb8637c059. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/JPH492400102.