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 0x0ca2463084d51bbf963be4d2c89a7936f6e50b8e967eedb18be1c44fb7c1722e. 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/45b7560b-ea47-47fa-859b-247944502b37.json and https://artists.proofprofile.net/proofs/artist/45b7560b-ea47-47fa-859b-247944502b37.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 0x8b83ec39da1f286f42148e0c801385a2a65c85b86d2bb1dfd57ff2978ba813e6. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/USCGJ1468362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437f6d0f879c61dcc78e9c3ad93b62f0454b2232e0cf5ddc03d6cd0235c35f67. 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/ARY4P2300431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947a1bf2a82309881ae580efcc0a856cd912aa661beca78f459a6400e1756692. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ARY4P2303000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d8756c2646f201da3527ff68837c5b2ca50f7b91035bed72cbd816795d5b3f. 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/ARY4P2300394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf44757b4b05c55c1bcba6eea8d6dc2a2ea44b213fa117c31626a93a492255ec. 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/ARY4P2300454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbdfd2b21ef26fabb3dedf834dff468b34302cb8dd4dd217b9f5de40a9e7718d. 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/ARY4P2300455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437f6d0f879c61dcc78e9c3ad93b62f0454b2232e0cf5ddc03d6cd0235c35f67. 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/ARY4P2300431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e10e22cfb9bda21d5b9fb1869c6b2a69201e78301806fbdc24f6159de483ef6. 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/ARY4P2300457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa068ddc2cdf7b143b2f7543b60db4714617fbd4a4dee251f7f4f290d89784f8b. 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/ARY4P2300459.