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 0x76bc1968e0431bf67937afc02089d36c97e5f6f5a1ad5c8633c21ce1f1343408. 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/6d5cdfe8-8bfe-469e-ab46-6cba5a0efc74.json and https://artists.proofprofile.net/proofs/artist/6d5cdfe8-8bfe-469e-ab46-6cba5a0efc74.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 0x856a11ab5660ae230246d089b555cc14f8db13b03b00e3dd7d2b32204003deda. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/QZ4JJ1656573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5795a6f219fb55da6a2978c7c0e003706a75a09b890c8f8c4747001d7ee2fe8. 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/QZ4JJ1656574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b7812f56cd1ff7e19644f77629da3857f1568afea6fb1294eed254b23cc51f. 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/QZ4JJ1656576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a035308f74896e043b58cac792dd891511e3c4419a0d119d7ce5d6935b98689. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZ4JJ1656578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf308fdc7db744bbc416ccf3eaadb6a9b8ee1e7579ce96b28df58b2a8c6f5c7. 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/QZ4JJ1656580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5f8961177c6616c2c700ca6b0a20515b7499f4df86845da8d77ff04ef7857d. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/QZGWX2077572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721bf97fb624a846b1d3937e9b4932c74d5281fe8aacc49216d765cb3e5943ce. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZGWX2077573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb92d26336eb5410367de777dff3aa51ddbb86c5ac9c70cbd5087a01520a2225. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZGWX2077574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce490d365bdcbc0b214f558a7be017215630e55ecc0b1fac41d8f252a27534f. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZGWX2077576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d431d3ebbad579199b4f96e85fbf99d274cf5101c5101d8249f2416c652cb6. 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/QZGWX2235230.
Celestials (Vienna VTuber Original Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6d2c5e4d0d1a880501592585d1b4df2e9008d4ad82730c3c6189accc53ee5f. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/QZPJ32164421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34a02f19a6e5b75ffcf84aeab5929156930a7f36b9d57ee01ee554ad57d6a93. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZPJ32164422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7dbcaff521b77d198047f97a2d32b815c15ed7f01538b530c36b74722173a7. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZPJ32164423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622a00ca58d7e7038c1bee3134550c3cbda47a304e4d4454840dbda99763bd12. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZPJ32164424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef4e5d346991051686347f443e61a58932804a88032f9f32a5d10b2e5a430d1. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZPJ32164425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b60bb02f1a61eea60b6a67b7b0fcc884b86cb3a3d122e7abbfaa3fb542a983. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/QZPJ32164426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d96b9d5789909a931b87236548a2bb84ea8db0c434f733a96f8e15b99295ad9. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/QZDA52381886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368c7abe4e7249728afd3487eb9f401eb4b08f17faee52491d6e5a3dd2969b75. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZWFJ2400324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c582b7e1b4f79d4ae877a8b2198dce9387425dbacc969c04083af2e8ad09dd1. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZTAW2568645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x441e22dee77f263920c4f3fd415975eba92119e73350377c1623df2caec5f77e. 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/QZGWW1913796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da997e5a89577bdec72231c1690d63b40d567e9ec92f3c530d086ec630f9c63. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZ6K42001181.
Don't Forget (Reprise) [from "DELTARUNE"]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a6db37d43c044b460e71b3bd47409da79c4b9a0f42a63454dfc365d06ebc9e. 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/QZ6K42001193.
Until Next Time (from "DELTARUNE") - Lo-Fi Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ebcab306adcee0c56fcf4bdccbe69329de9a9bd1965f818731a103e44785c09. 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/QZ6K42100482.
Until Next Time (from "DELTARUNE") [Lo-Fi Edit]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83891d905374e38aa00d0c7b67c607c6c4eaa12f814eae82de95d46be0d6745c. 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/QM24S1901131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6973424e32cc3b73d09939fde4008fdd78d7320e52b3675a186387594a674d1c. 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/QZK6K2258645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5e9b663c9000fcae2d600295068f70535513450b10ad93c43b56a4383d81aa. 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/QZTAX2251611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce61d01eb18e619d4ce529f0a7c8036876d9321916096e066564eace776f2f11. 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/QZ6K41900366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047c759b7c5c289c9ce299e211aad88550ac6cb8d00199c1844aa0ec55466dcd. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/QZ6K41900372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4fc7b7937f358cdf14fe8c37012a84ac896cf36b9e22d46a337ca2f6b96d0e3. 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/QZ6K42100592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9428d3f4be4eadf6045d0d8663f1fad806dd62d8b48d5b69adefaa29cae44bf7. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZ6K42000178.