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 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 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 0x2a28230f994851b67671915f3716eb558723834ce1ab08a2df26d8b77df6b434. 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/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 0x491b65be4f5a1fe49b4844f9bdc5c5662d4a01129710fb804b689b1b20808f8f. 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/CACWV2030585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x217f8171744f27adb735cb987970eff35072f8c65107eafaaf40e6e5b7d30440. 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/CAENV2032249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70adf2577049b055e4a1287bcf14c386de2c0f46cf070ea105369994455429bc. 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/JPE562113973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea85b8bf539368141a344fa2545da4f689392d00d90029ae9c6382c1d300b58e. 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/JPE562113974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63fbc57becda29ca59c905f717d6ce437b36d731d4799517559b3f8140f3a3c2. 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/JPE562113975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44070e0963924e5cca7c149ab28cf9b89817665a5577b458628fb70c20e3711c. 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/JPE562113976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e91e070f89677730c9264b0bf221247b5975765e4f1e65dd9c3bd785394ccc. 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/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 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/JP92Q2301038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa31b3eeab7375f678fbcc1796d7f366e44dd0fbb7a90227b8131489fff2b72e. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/JP92Q2301039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac01f42300045727f7eba8198b80407afe4f3008442e4a2bff06717dafad9b7. 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/JP92Q2301040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb88c6076cdc772e49550feb2a914e7ba95231e51eda727881282d25ba999ee. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/JP92Q2301041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767644ee599474d5b8297998b09a28cb17dac82c137de0179db197da23ff3d20. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6cbacf726dd52177db3f8d4553c568d5e8faecd04f3bf4a2c215960aff78bb. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/JP92Q2301043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x564ff0521f83eac8c272b82a4fb337b654795ebfcb5f35c154cd1a686d0ae69b. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/JP92Q2301044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6797dbe7b6b9cfa4fde06e3df287548f93a631aa3d90494a0c9c16e8198ba36. 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/JP92Q2301045.
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.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5fd520191763462277f92d6a3f3fb06d90beb05910b9fd8fc62da8674e0eaf. 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/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.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c0af730cce4256818ebaa27402d31827597aebb4c1c4ec17dc98e0e844d788. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/TCJPX2387514.
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.
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 0xe581cc86be86cab9fd332b1a15cd662a3f97cab2888c3fc0c03f206b60e576fd. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/TCJPX2387526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x074c59779141ed4e084f42ba154215febb104f01789e1b71011c3a69878bccbd. 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/TCJPX2387529.
B.B.K.K.B.K.K. - WAKARAN GIRL VS Kisaka Toriama Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb0d7f0363937e4847d31ae76f639c0d57681ff96f66c771da8b68f5ca8228c. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/TCJPX2387532.
B.B.K.K.B.K.K. - Hexacube vs Xeudo Code Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a10c55ea7a631bf63422761a91e96e7504fb37de7154f0455e8d24400937260. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/TCJPX2387534.