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 0x8a37fecc5cd83898e121875ec9bdc3803e9d87581519039a7c13a95640159108. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/52ebd2e4-43ac-4b55-92d8-9a7d24841993.json and https://artists.proofprofile.net/proofs/artist/52ebd2e4-43ac-4b55-92d8-9a7d24841993.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 0x1ce3a66f7495100e2ef56d34f5f2e4d23c9ba62823eb3b0a4ee54acaa54f66eb. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/FR0Z50093338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676e788e47fe4c1cb62feadca47872c37ce9576a19986e7de1dd5a0b4bb48c67. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/FR0Z50093325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddca0fa50c747a224711ea3632411c20f7e357bbc62bb1552a5843ee5765e8b1. 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/FR0Z50093358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2decab60b0d7fbc489341079e188a603125c1a43e43b4979657efa149e46b6e5. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:56:58Z), 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/FR0Z50093359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418446d387b9f4e5b445732a9a91b079332665eb15fecce0fa11ac2e4a30c44c. 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/FR0Z50105401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa816c0ebb30a464dbf048065300dfa10268fda4a27bfe01db3c395669d541403. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:06:18Z), 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/FR0Z50103087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a82be14a3323e759ac9d9312a90f593b977bc1d302d46e1e047490c9664c51. 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/FR0Z50116580.