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 0xa5e263f25de600956b34fed86128544e8776dfe4e91c424072193dca74076c05. 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/f7931af1-5d27-4443-ac66-74f9f9bc4998.json and https://artists.proofprofile.net/proofs/artist/f7931af1-5d27-4443-ac66-74f9f9bc4998.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 0xb0c72eb549bbfc418b3585ee7d0774e84d9370408a6ccfdd1d0a85c442ae98c3. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/JPJ901203050.
スーパーウルトラミラクルファイヤーサンダーエキセントリックダイナマイトスパークセンチメンタルハレーションミラーひみつきち
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a5f7e9d464e904121d1b81f2ae2de8f125bbc331a60847d3fffce1f4e42b386. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/JPJ901203060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x175b7d3b2cc5e9130c9605c4c1fab3571d32ce985ee88175aa8b9fed5b87a98d. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/JPJ901406230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9601a41f15e8c63042625a482332198dc9e12dea8426080cecffe7cf54039df. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/JPJ901406250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8378db65236894ba3bf2236962aaf4237c3fd1c625d6adcc12d5030e3732f593. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/JPJ901421500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedbd5e33060ddb5da4f09cfc3452c6dd2c49655fc495be421c37eee3a232c2e2. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/JPJ901421510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa276f85bc716de394ff65ee562c2e0f2c6259c1eaeb174c594fcc8988307679b. 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/JPJ901508870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda076f24b8ff9d89f6fc09e0d7d2bcc253131ba3f71d0f1107a4cadf5fc7b26e. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/JPJ901508880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29726e74d36b139cd72abddf2ff3d2938c9a480b4ec8ebef520fa76fc49dc62. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/JPJ901508890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73645027072ffb28de99851a52134dede3af7b6f019f5f0404a369150a49902a. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/JPJ901508900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8e923aea9431065e2622ffffe419a0158aa1efafb104ad6addc0f1235b52b5. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/JPJ901508920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9cab821d3a80aa539d6a04f793071e7aeab4a72ea37a52e962d70371860977e. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/JPJ901608440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55315d4167575dffd08be4e660d8f5ebe90714e2da2419cc538332261ea84a4a. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/JPJ901608460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d7b49eaae3f2b8f8273d91a3ed2227084ffb411bcca52e82ec67ef1cab66e7. 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/JPJ901608470.