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 0xa6cc60e7381266c6cb62e045887f8ae9a1dc4e3de89670f82a0e06a99b6c5cc8. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5733e881-ee03-4e2d-8dc1-ff6d0f1b68e0.json and https://artists.proofprofile.net/proofs/artist/5733e881-ee03-4e2d-8dc1-ff6d0f1b68e0.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 0x9cd202bdef98e08e38cbbe88afa2a96641d1062bb3eb47c4d15709311347b7b6. 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/QZFZ72271179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa378c611daae7f1cf6dafa1c960cf185c5c3b58ccde297a8f18fc6d1610ea9f5. 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/QZFZ72271180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4ffd4e87445695698b52f827fbf255063d869014f6ea595c58d3c0f9fd7167. 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/QZTAS2193259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6401817d2aa27662daf7b8221ec7b59ff062104e375167d8b815998860bb2afd. 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/QZFZ72271181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea261fdf4b7129e7ac4671d70480e1be8f3954e3fc2104cda74cb6ff98997bd9. 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/QZFZ72271182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d053800ed28176e378e86fe364ef55d4231cc0137a8735ce2465001892e06b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZFZ72271183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1aed75054578f5b923cc52f488217b09b48a0a0113bb94a9e5dc7b37117f3e. 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/QZFZ72271184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35a8a98d5b4f1be57c5450ebbd101d8ac7b26424f5a0540194440623d2741d5. 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/QZFZ72271186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x917968fc3bca009f077021c76c2c253806c3e1762637c0978dc71a0361788845. 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/QZFZ72271187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4b690fb27927c8619241e88c65fc8176b06315f9da63c9306ccff568ed881c. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZK6L2385594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da046a3c75d4a3bfce500efe02bce94e918144de2a0e9c8b925f0d24cec6026. 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/QZFYX2327953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e0c07a98dd33c77586e1a87e6c2d6e9dbb79d62ccee78ceda3ef070dca4c5df. 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/QZK6L2385595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea4546ed2efeb1a3c2ce3ffa6a79ade44138ce3e341e326758f0d6b93725e84. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZRP42276975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da046a3c75d4a3bfce500efe02bce94e918144de2a0e9c8b925f0d24cec6026. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZFYX2327953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2458a46c54bc0b1a8667a33ed5fc699731979e772689d5588681592696b1f3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZW9L2234666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea4546ed2efeb1a3c2ce3ffa6a79ade44138ce3e341e326758f0d6b93725e84. 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/QZRP42276975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4ffd4e87445695698b52f827fbf255063d869014f6ea595c58d3c0f9fd7167. 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/QZTAS2193259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03cc68446842775b2ff14ca9f5b096af623a08efe7b2954012bbb21640d28d3. 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/QZFYY1974231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2beb42dc445422fa6505fca649672ef1f5cf7986310de890d9703b85d2c52c21. 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/QZFYY1974232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6692fb3f4d395b909c68f9b7a46254923cf1fc106fa1c664fbaa79bd867c3c9. 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/QZFYY1974233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52e594682e91040b0b3cfe7cdff235a47ef140d55ac8f39ce2d617e26cfd386. 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/QZFYY1974234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34427eec56a59071596d15b2afbed5009d6dc5241d38450f8e3c6e1b0b49ad02. 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/QZFYY1974235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf875daa966eee4c12dfc756e43d8b12ae92f631b707051011ca3829d57542e7c. 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/TCADS1860652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398fbcc7a661f744759e426550c05e0fc501019161a59729e18e01b6bee3da3c. 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/TCADS1860656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ee7b9eb7a8334b40b384b77d83919d331d8e52b61bac4cb994f0625aa4646d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCADS1860709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeaffe0fabdd9766086b79e4726b134c4c25c9f4043bde0db73dafa4c24d0676. 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/TCADS1860711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x280410b3c23dbae4e25b730386c356ad8c177b1cb68f72e91e0a02095e61fc66. 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/TCADS1860713.