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 0x19b4b6b562d3c8920b8bf15a1f2ca71784d55ded24ca8ffe4bb3b185a04452a0. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d9f016bb-0871-4a26-82bc-3b8b88f4279c.json and https://artists.proofprofile.net/proofs/artist/d9f016bb-0871-4a26-82bc-3b8b88f4279c.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 0x5c200091a910de0c8db425bc9064a7244426b65f224004c020fa402635a1e136. 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/USDY42349396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc08d9135da0f58d63e7b30ad702b6704945a2ea8a9891a47ce1feb850f518c. 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/USHM92233871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2565d6f973d86a73a1797f22a14636503c674bccdbb5151d5d101b2da9c68044. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USL4Q2410461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f017582ed7791d313f40cf944564ba2760b5d2b11b72a24aa00cfca7b1978a0. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T06:58:58Z), 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/USL4Q2383514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e740a14b5ad9147cb847cd4f83bd8fa8c1c086a90407e5cd7e54e9c31d45c07. 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/USL4Q2383515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0233be23829d67a53edeaeb83d9ba2bd27c4cb04bdcb05f30ad613e1f219365. 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/USL4Q2383516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4186639ded4d450a943b05d2e96fd0bd410b7efbe3ac7d3f4476b2137c987d3f. 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/USL4Q2383517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb514e1e9f16306cdff6186cd83c2500ceb0dbeb6e56cd01f35200a7960ea1603. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-22T01:29:02Z), 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/USL4Q2383519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76957f50c4a59e9e1459bbe16c4ec1ef3760029c1fc15ca3f75963fb71622e63. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:57:32Z), 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/USL4Q2383518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f2ed079d86dee76eaac25f2ca92ff67c0a6540f88534fa27c6935e3c6c0766. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/USCGJ2396589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc08d9135da0f58d63e7b30ad702b6704945a2ea8a9891a47ce1feb850f518c. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USHM92233871.