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 0xa7f3cf5fa96327b6dda298c8ed4011bb64b64a0ee7085292b3d408b3ee735305. 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/4ec405fd-2953-424d-9e92-aafb39dcf4c7.json and https://artists.proofprofile.net/proofs/artist/4ec405fd-2953-424d-9e92-aafb39dcf4c7.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 0x0b2217426be435d7a8ab845eaf3b07536d7a9e9eeb9eb0f13f2283943823e5b4. 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/USWL12300978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e35e0da945a5d2473ff3e14430b5ba8bdb0f16505b663a64daeb31c57deb8a. 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/USWL12300627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e35e0da945a5d2473ff3e14430b5ba8bdb0f16505b663a64daeb31c57deb8a. 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/USWL12300627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13eb5633942172825cbec2926fd0f4fc6c13afb0b134e55c2ca22f713ac190af. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM6P42323188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9a1bf2dcaa315ea7b24badbad6710487a70a7e2d65c062aa953777c38bddcd. 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/AUMEV2263699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8eacaa1b6492652c1e794f4ae97112ea8f1db74c8321a1fcbfd84c0a7486f2. 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/AUMEV2277867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe610f149ea7d877d375e87e50c2147c17dea88d5e373ff97f4e4fa89b4624a5e. 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/QZDQH2253157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26cf9ad9545af4fb7446b56e90ca4d850b681807c978ac0c0ee5a95f76afccd3. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZDQH2253155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce39e044832688dc9d5486303601b7ba34eb44ed8a6ea154027e5d192d34eed4. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZDQH2253158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b827ba98a9b54c4c2981a275c43245f6273a2f70ad5840a2d154e0eeac839de. 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/USDXS2303435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde81c5240fe08ebe45b90c70505eb2e322d5c2d818d0d925f4d62bbede80a020. 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/USDXS2301581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b086f08f1dddf1552cbdfab9f1ec17404666d047cd51d65dbaaedb39de8c9e. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/AUMEV2346146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62bcad19a2df033b4964cfefb7c1c42d3749cb3469f713289c326c8bda7c6df8. 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/QZDQH2358437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5f8496a92a5a092948886c1649473e3c1fb38c2801b1143334c380dfe50013. 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/QZDQH2358416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab1891019f03008d7848703eec9ef2d8d5e433a92898ff5690d644a6c849cbea. 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/QZDQH2354684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcccb22008ba02476c44246c702a704e3b1c3accd511495a19c861ba6fd98d9dc. 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/AUGBT2216222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e1ee9b18b43946db5c89c0aa095fe0fba55204e7612717dbfdf0df54f147511. 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/TCAGH2251615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f46ef0e0c9c1f68a26a46c9786450d11fc51434c0c256bcb1900af7df64a563. 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/AUMEV2255676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c350eddadfefbd7c3733d586241f6ceb7e46cea34a06388374da818b93e112. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZDQH2155571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013f84420b43e9f1024994e62494109d07fb1e9ef74e7141d1ae2f308a7146fb. 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/QZDQH2149456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a69d578d151f0f0ab5c8b5beed2a8c561c6b026f5c72a1e8648c5631a1126a. 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/USWL12301595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91136bf610a6eb715d788b7844dab33acca78251178ebfecf258daebe2a36861. 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/MXF152201388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f133f1e0cb34cdf17a256955e4a9096652a17ad02e2341b9a18ce2a77457b9. 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/USDXS2401770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad4f348df3a3b64975fc1642d32ab0313a8dc4266fda5f57c952285b0f4de0f. 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/USDXS2401393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36acb07127fe5202acc4f6cfbc061e0dbfb80f83bf6c93dc06e7f86e17ca4993. 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/USDXS2400905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafef44b40ae6aa9fee6e237a4ee091a86c5ae65e221956383725fed1d14657fc. 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/MXF152201355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f73bef9eb95317885fc708f137836f692fb8e586674a862a024b2324d36ea7. 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/USWL12301068.