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 0x44c71b6c16d63fc8add3e62bd74298a40b7ac12a62a6b8ae942c874ee537f478. 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/a1e7f173-775f-4313-9439-d97950138fde.json and https://artists.proofprofile.net/proofs/artist/a1e7f173-775f-4313-9439-d97950138fde.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 0xc3e89278f0a5ce950b8073ab87a94698fd6c414745cb1d397d2392e647f501bc. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/JPH492418000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5383de223aa613adc21ef4de12e424c0036a4633618cddcd817d5127fc2d3a50. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/JPH492418002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cee83a4c19d0ab5ee18b2f96084b43ff1c4575af168c953b97927372b36439d. 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/JPH492418006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb558beb146eade4e8515797505affeee3b932e5eec76a01aa5dc3ea11e42f9e4. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JPH492418008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5832d8c23645b89d477b2ada4c7f1a65a9d1bb7e46cfbfe1b41729cab8f979c0. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/JPH492418012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa021d90eccc674759c7a87cd03a657ccc09ef2ee8f6e2776b26cd82aa4a156f1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPH492418014.
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 0x5d28b54348d4bda0b64765fb3ed6306b9210af99616253fe0e7d8b5ed36bb643. 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/JPH492418018.
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)]
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 0xc0aa55cdf623fa9ad5297272c9e31495abb725708bf7fff3fca439411bccc98f. 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/JPH492400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca9a12a114a0b28e82d2c928d2f2584b1178769505b26d0663e06f0b108358b. 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/JPH492400103.
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 0x57be6aaae2b62660c113ab9737c5e10454fcf5944f6cd4f5a80f7b411e0d4327. 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/JPH492400121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d45cf7d4be2cfbc86f7be6e928d55b19870fec517d7529ca4ac0e46e86f0401. 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/JPH492400126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb032ecc7db53769c3b80b541cf67d6838b48573469d60f6724f91a9cb44e5a2. 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/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 0xc32893cf1919c981ffe45e0f3ffc33a04e9462574d33cfc778d995be37a6a299. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/JPH492500036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f5e64c8a4cd275c67945012c8bc5746dd61a11c6c031a3468437fd98c73d35. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/JPH492500051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2304db95986092f94bc8c8a2fca9e1c2c913f085c2a66e43a23516d1b56345e6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JPH492500057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580dd866ae386c273d05d9ab3020b74c2f647cef716d7c1ee880e3c063bf31c0. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:50:37Z), 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/JPH492500063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1738e4a1a50d7f05c4c57dff58b3e5c46765b3df91b83a60b03c73fa8a3f6210. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/JPH492500100.