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 0x732520ae0e866c87daa38c1c24139b0e7190122df50f1c7c839bb5da3e6a2b85. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3fdaf9b9-da64-47fd-9463-309e89c95997.json and https://artists.proofprofile.net/proofs/artist/3fdaf9b9-da64-47fd-9463-309e89c95997.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 0xfea3057a6567850e9a7a3a08c427c291939cd2833c8acf7949e556814804c62c. 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/MX2831908393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1340d687509b0333adbc551b9c6770875ff9bd97cdd5315039e307dffa4ce56. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/MX2831908394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9052e00060820b32cf8c03ba9fb3b1543c33746f5ef7ab904fb8a9ef66a2eccc. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:21:14Z), 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/MX2831908395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c7b2f6d7d5b930a26328783f9c03b198c588fa702960593e32765e70500a1d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/MX2831908397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb38fa160e7624718726cbea723149cf8f0bc31b71d6d852eb5d637015271488d. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/MX2831908399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f08e9812139f65cdac6003e07cba6b3cd3ba613df9a4a2fd53ea438dc0392d8. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/MX2831908401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a4c40f64d8bef399847d7e1a283e26afb862e85636b971e3d869c64cd992bd. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/MX2831908402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5429e262efc0494a6e6529ab4fefa5f15409cfa3d43858956ef2780a7024143. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/MX2831908403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f970b2165b44fd6be3ad28714efa669553c2a8f2212ddca5056abde6a83e6dc. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/MX2831908405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76dbb01ae935a3134c615505e6ef90f90ccd36bf2f27bdb995ce57d8634fec6d. 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/MX2831908407.