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 0x5894ede1dd94faa7bf9d34d22641594c7b955fc5f4670db406fae0f9c78fa7ec. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5b9b8b72-8a9f-49f3-ac6f-901285a374fe.json and https://artists.proofprofile.net/proofs/artist/5b9b8b72-8a9f-49f3-ac6f-901285a374fe.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 0x0da4872969d65b7209bf37a9c19363ac6472c144291a5deef497dca52dbbdaf8. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/CH2011216019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c6874029f93199f60c52a14a359e48e9d3b5997aea623f3598714ac673c76d. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:30:49Z), 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/CH2011417171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cafe41649a29609f2c10dc240e483eed0b65431f86f77cd712d2b36cfdeec15. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/CH2011417179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ff73450c38183613d47f18d098fa86a044cde963903cefd33a038e0a5d5f54. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:51:16Z), 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/CH2011417189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb351262852ed265a8c13b198a20084cf7a8c9385f401aacea5244877bd3bcfb. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:45:47Z), 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/CH2011819514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x598abfdb7660051047d17dd634df3fd29fabbf09e927c5f5bdc23393212bc008. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/CHC582000172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f78f76056209a63a7eed6c7fc3b88c515c706beb78ff5ced63fa4cba77dea7. 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/CH2012220950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7707de4e7f52edef007fafd293c314ddda1cea5c68880717e0cf32adce8cdb1a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CH2012220956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a86c045ae1b627ce88c52cf97a0e080b3ece21a7a5cc6112e7eb9e1375b1332. 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/CHC582500327.