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 0x92980cc79d8517e6e9e9603c39c67b781b4b195c942b746e20e5f5e32692fa68. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/037e56bb-84be-4465-8fc4-b311e984d871.json and https://artists.proofprofile.net/proofs/artist/037e56bb-84be-4465-8fc4-b311e984d871.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 0x2d2b1d1ece92f03184760c854e6ba4d080cc1ee78d9d160e60c94c8f0efed2e6. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USL4R2078820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3538a463e2f1a7a0c21f6023709f231e3983066bcb34aaf50dd9644ab3e1ba. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/USL4R2078821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d945cfcfe8017c483fa1844134c85eb5567dae4b6f8dd7268f89fe24fbd8e91. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USL4R2078823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1327e0c29b24c5326552012ff444a87f96cebd3d2443e3e5dfeb786d193d3511. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/USL4R2078824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd4dfccaf7abf24fb424654f5290a621b6ebd13f3170401c1b4a0640ef69b76. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:39:47Z), 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/USL4R2078826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6486a541ec11741d1d3eeafa6a81189b5575e1b54fbd63a96addde54c2fc436e. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/USL4R2078828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f36898843a28ae1818afa484ad6bddab8d8eac60dd93db05b9cf9ce707a7ed. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:48:01Z), 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/USL4R2078829.