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 0x0eec457f9c3dc1c3858bbb6d394d745312024478738b8b7174940a7466ecdb29. 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/85994dcb-8c2a-4ea0-891b-a972cfb6af2d.json and https://artists.proofprofile.net/proofs/artist/85994dcb-8c2a-4ea0-891b-a972cfb6af2d.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 0xcdb78c989ee720baa882de982186a6868a2442fac0c52b8b53e9994d4dea95f4. 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/JPE640700260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1394af081cbd1bf0be09277622e027da9d102a5568c9e581a5d91249e3ec653a. 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/JPE640700261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e228ef7d46b4dea8581b0eaf196fe68d886cf79d4e07df8540ba98261bb845. 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/JPE640700262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d2142c859ea43c15aff3976c88b61a07ca836e5a520b28a42b7eb06ff6f527. 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/JPE640700263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5027090981b19ae0af36b1784ea684afdd69dfd64de73ba3dd4676031e2d07b6. 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/JPE640700264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06ff2af35e6976c6673bfbc724be0d74df57af870dcb2a5590b36586b4a7be4. 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/JPE640700265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6452a436e7983c90fa6b885d58fc940d2f0e2dd2bef6552270220c0f72e7f4b6. 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/JPE640700266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd1156fc01439c49c9e1a91cede4428f2a2a83d3bb5db249c03025075f82c06. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/JPE640700267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6fa77afd0b2e5c9eef3bf31d0abb490e1effbf80f537ffeddf18f308884456. 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/JPE640700268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f51feb3caa07914dc54b52f79d09f6f962b2ddc3c024a07cef95cc50bb6424e. 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/JPE640700269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3382619501af435b2c7c2bf08e556dfe51bb3d036d5fe284000c61578a5b32fe. 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/JPE640700271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10baa96515328b121b5b250216dfb2cc9a384ca265bd58506d4b19cd7e9c29f2. 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/JPE640700272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce3a9dfa93bbece7b7c3fafcf1e54c9db310cfd11c323df2df7a2c512bcaacc. 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/JPE640700273.
ピアノで奏でるJ・POP (世界に一つだけの花)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7621d44a2fc363b707b804fa041861688202ff7f088f36aa6c1557495eb37adc. 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/JPE640700246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc09c0bf4170bd905a0809c43ce7b510f542cfff63caa5d9c2b60a73c2b6788. 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/JPE640700247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb11267605da654029f2bc0690e07816d137175e2d839a344fc9d37592ebe14. 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/JPE640700248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e9290bd18bcf2ae82d841f49399a8237a66cedb0c6cc83d1c74e9a190e1b8e. 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/JPE640700249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8eb67699c82cc37c5d010aa845f7ade711c49462af98d0a7f99829b5e16f982. 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/JPE640700250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc2b931d3417bec96703e79cbee5bb31e39fdb7bf060e06e7d48e765a48da55. 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/JPE640700251.
真夏の果実（サザンオールスターズ）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e39d200b84e7460178537e4506fce4b27fd491212c63a839612a8535739474. 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/JPE640700252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654dab50b83a7db9df3edfe5a8dffab6109c1bac26902cc3753e9946adee895b. 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/JPE640700253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e0e1fc5c3af04cd7b301ac8ffee7ef6738572bfa71467393317af95e31fda0. 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/JPE640700254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee061f7f091d8b9e10689a46f001b39e3f2a0b4779f2410f8884f137fb74a812. 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/JPE640700255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6917be02b7443a8ca662e7415cb642d7410c04283bd120297224104d482b6330. 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/JPE640700256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x140acf070a4e6b8eca67a0385a31bf4434aedee87bf493697d9db5e4a072d591. 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/JPE640700257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd861e32e3b0e44c53371bb2b2b7e46bb8ad634ad43aced0191a9b65347741150. 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/JPE640700258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8cae630a9d820d31cfd1f52e0c816a3d70147b17019a886b8f2622287e8b32. 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/JPE640700259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x722835faa658fc0df64cb73eefbe3f3c1f517b3d4fecfd2ad09b9ac88a7e93a4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QM6P42317582.