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 0xf0da1ae68e166afbb25ddad5e1e2683ccf51a1133ee895e04136e8d9e85d406d. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/80c3a22d-390d-4c4e-9b04-8f44ef902165.json and https://artists.proofprofile.net/proofs/artist/80c3a22d-390d-4c4e-9b04-8f44ef902165.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 0x2a28230f994851b67671915f3716eb558723834ce1ab08a2df26d8b77df6b434. 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/TCJPN2189404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c8b92cd7a0806a623325976846b7751d0f8b0ba8624d423f2be66b50fdfd7f. 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/CACWV2031018.
おにいちゃんえっせんしゃるイーピー２
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70adf2577049b055e4a1287bcf14c386de2c0f46cf070ea105369994455429bc. 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/JPE562113973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63fbc57becda29ca59c905f717d6ce437b36d731d4799517559b3f8140f3a3c2. 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/JPE562113975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44070e0963924e5cca7c149ab28cf9b89817665a5577b458628fb70c20e3711c. 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/JPE562113976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e91e070f89677730c9264b0bf221247b5975765e4f1e65dd9c3bd785394ccc. 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/JPE562113981.
おにいちゃんえっせんしゃるイーピー
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da71e5fecccec9bfabf102d8c660ee3227d1dd54b9898fed118c5b2f45eb79b. 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/JP92Q2301038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac01f42300045727f7eba8198b80407afe4f3008442e4a2bff06717dafad9b7. 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/JP92Q2301040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767644ee599474d5b8297998b09a28cb17dac82c137de0179db197da23ff3d20. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/JP92Q2301042.
君色マリンスノウ(立秋にぎやかRemix) (feat. 初音ミク)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x059f5bd461d3ef6905515ec19fbc1e843072e16fefe2140858b9d652442ac175. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/JP92Q2301046.
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 0x3d5fd520191763462277f92d6a3f3fb06d90beb05910b9fd8fc62da8674e0eaf. 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/TCJPX2387509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd101ce969982842b4b4e486ea6de95d974732186034db6fc8dc6f577fcfc970f. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/TCJPX2387510.
B.B.K.K.B.K.K. - Kagetora & siqlo PsyReMix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3fa7cf9360886752c20be7c0ea4b364d59fe23bfac2e82926b15b616c944a9. 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/TCJPX2387512.
B.B.K.K.B.K.K. - Yuta Imai & anubasu-anubasu Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a2da506fdb30c9d061751cdf29cd5cfd760732aa629f28b1ac289d87bd2b33c. 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/TCJPX2387519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63f2259fd8ef44bf4df8b85c0b25b8926d9d42ed8f1bca94fd5a56674e4bede. 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/TCJPX2387522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee8f6ca9b8e48205e9bb8aa38e2a8660e036e365efd2ddc7ca22a4ae772f7593. 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/TCJPX2387516.