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 0xddc734c76b51fa84b6f8ccbd695d2231029c6e6562fce8ee6d82701dfdda2981. 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/c228e3bd-e7a0-446e-a000-0aeb69a8f370.json and https://artists.proofprofile.net/proofs/artist/c228e3bd-e7a0-446e-a000-0aeb69a8f370.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 0xed40fc1c41df6967ad8fce6bedd6f4748c94ffabacf28cb141820ec4ac200412. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/UKZGC2401579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b29172e1db1ef704df73e7845210b49ac6846f19d9c508f40fc431dd7dcd78. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:34:19Z), 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/UKZGC2401580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305d3f3fe4aac9d2e6595fa8443aabfeda12727811f0c7df382c991efec3dc99. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/GB8KE2408296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b3bbecf96b17bcc3e60c3267ce47585d5028b83bdaef0a0c2b0e698425d93bc. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/GB8KE2408297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15cef605ca510692bdf172782660bf4a009a0ac48bd23a28d13fb29c3475b87d. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/UKZGC2404628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c51e4ab628f69ed7cf86a0aa975cfc8054c7ef1051d0d1704d1706a8c7f42eb. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/GB8KE2412819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af0c6d56368510e6d1cda7e95841a55937b11c02da0eb1409d114ab5d3548a6. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/GB8KE2412820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61bb2ddbb1c90cdac1595502c3cde0eefa3634e8ac193db47984ec88a5db2d2c. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:38:17Z), 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/UKZGC2404332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0783e8a4610d87272049d0bc4acbdffe2564c9065709c673bb86c9e0314464c. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/UKZGC2404872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddbf1c25c145d9b887e5f6edc64f4cb6a15f0a1d4f01b1ae2cd4d8b6df110baf. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:22:37Z), 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/GB8KE2416615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b238162430eef89333163f734afc1a3575e00ee49a2328aba4ff2a53305a62. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTB52433205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216ae2abc9f58390c557c9586f53b82f19130627186ac3c9814e241a22279e86. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GB8KE2419897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb51a4d3a4f13fe6746c09027aa9b063bac0f8992c48f24b07e4ccaeb02365b8. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GB8KE2419898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c30c0100059caa62b9192e95c14c6c6b35e0976013b12ce4bc9fe4afdb50a5. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/GB8KE2421092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdfbf9134c1ac8fc054023f66bb6e61fb15cb8a90a48231d162a943e77c1a3cb. 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/GB8KE2424309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de2cffef1a5bd3e66a8f745e385d8ffec03da409120fc605d534e37d262e72e. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QM4TW2569711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50945c21602ca6ae98e7f3a02cf5096f5ceb564c3ec431b67d6620c89b2581c8. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:21:12Z), 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/QZK6K2599555.