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 0x54fa0ea2f3a6c51659e2a0f1c988fd78c10f68d0242a220c84cd17e3941a2fa3. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/084d29d3-7a63-4720-ae9c-5cb5acc13e38.json and https://artists.proofprofile.net/proofs/artist/084d29d3-7a63-4720-ae9c-5cb5acc13e38.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 0x7f4e69afed88a65ca810fab030494efd9cb402f34f1ad21c6de76b93f6ee2629. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZH5E2320803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5563f86f30f01545394a8e1d7794c863a007acceb5356a8f4674a8d3f63216dd. 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/QZH5E2320808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef097a4533b2f97907aa75b9046bd8378d944e7e478d3ff13956d84ab77345b3. 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/QZH5E2338557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a875382701e907d92bea28aad62e637ceae4332af9e88bb81c45efa13ec3143. 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/QZH5E2320804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf04f5eb9858d90b0854574ac216ace7d9525bee0fa64df3184e862dd25c23531. 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/QZH5E2320805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d4ab3c28bde388e7cfd458224ed77a71eaddc0f5fdbfd12712c6f2616d0b9d7. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZH5E2320807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4867f716f1a5c0369e85bde638f4e44d20ce91107bff5c47459c292c2ad9ffd6. 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/QZH5E2338558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d2c73d3764beaa0040d7b5dba76dc56724d27f4598f62c2541edaead3466e7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEPI82402372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd777baad029f43bdbec483a3e28dbbccae055bffdfb106b8c6e1ad43ff6c65c6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEPI82402794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d6ce6fa4438e0f0b4e27664e4fd5335c4b57d617193ab990e37984baa45c1f. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DEPI82402600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2858c9e4940a5279d61c7e8baee9c27f8e05787d644bd6a5819d651770a311e. 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/DEPI82402612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6b682bfe0ffb2c471e9b5109da9eb8e6ada6fbd0342e58cf93794d80c33472. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEPI82402795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed7ca34da32ffdf6b1e4221ab7f9349d7ed31f7e31549281e93d49e34d2f517. 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/DEPI82432003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bdb5331fa97647d7b56eaffb2b51dc99b732a17fce492d1953cb52950dfc1ef. 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/QZH5E2320806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa92047b5d1344db8b09f77ddb7207cce7f9e8dcd915122586e73a3f1d7068da4. 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/QZMHM2337472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x557457b1e5a030770168eb3f7c919924d33a0b8d9d7de96a733f78c4f7d8ca48. 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/QM42K2384930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aab9c492aadbe641d349abe2fc372151baec5b15988c88fb069ee900d04f139. 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/DECE72501206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc060d8a51af5ebf75ff90172add984a81acae70d917f4bc3ed2b36e238c2d63. 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/DECE72501200.