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 0x4c2e70b6e778371e61fe7658db36c4633d38515aa07b571734566e4c296629e8. 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/0b09def2-a3ab-4b04-8b62-730693f719a0.json and https://artists.proofprofile.net/proofs/artist/0b09def2-a3ab-4b04-8b62-730693f719a0.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 0xa405b252e53479e36c0529c1f5bdc1847850bb9dbd690987e768d16b11205ae3. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/USDHM2302674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd637b61a6ed9bcaa6b143833ca370e1465d177fa6e8b54ac4a94fd3f9b50964f. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/USDHM2302676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b903ebb30fa6f0c79a003b558d67534a1ffc97f0f2d65b4aa5a2c1427ed98c. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/USDHM2302677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd84975e5fe144d4dfba7a1279592d9ebb9b89e1e50a824dbad72af010b8242b. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USDHM2302687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794d345c7df61ae60d4ddd5a3eebb9d8d97b7cfab9404af29273c79191265dc9. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/USDHM2302650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe7109f015280c3561308c98b91181bcd580d22df73f2be438fe95c8da94ae2. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:52:01Z), 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/USDHM2302662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa461093594c3554522077b717b640a6bee11fc9053e5ed59269023ca80b3f0. 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/USDHM2302671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc73dfd772c5f53713f7bb36f2b179e4abb5303d56ea81a4b416caeee0af320. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USHM91335750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f8aadb317e4210f7bf478c922b2427c704a48555c9587349201ec49f2f68ef. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:07:05Z), 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/USHM91335753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b87a2b1c12937ffa99bc3e5f473d9aa5eb7ea834b738a6a35aef847ede7d6fb. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USHM91335757.