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 0x0f1b12d75be617f07f471ce69b1f94f088efb7599f79aa93863c4f1f6bbe9cb7. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ebb20cbe-9032-4cba-a772-4fd57d75d825.json and https://artists.proofprofile.net/proofs/artist/ebb20cbe-9032-4cba-a772-4fd57d75d825.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 0x605f1e54c4b3e27654ff45ac0890a83005b8019d44c47584e8dcaf3fef94ea5d. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T15:34:14Z), 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/GBMA22459411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274b47d479b84d00c4df9ca564bb3b8df545bf75821a7b2b1a8f040e69374208. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/GBMA22459412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335b5cc73af8df422af4b98b7651c3b59ea2419a320a944a8ca38d2b9e25e510. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBMA22459414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14635b42bba70f9e2971074577715db2d1fd05230c77e7178697b6657d255d6d. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T16:23:16Z), 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/GBMA22459415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf66140e10fb0d31bf4dd6b209a60f7e953592a31c6bdde53e716c3d08524380. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T08:06:11Z), 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/GBMA22459416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x165a8a32a10a8bb8fae43be39889f387b3262765d5e6a2bf424ae12a1a4fbd40. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/GBMA22459417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d098cbdc707e6c65d2b76fe0b636b0f56cfa77df50719520728580536dcfb0a. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:16:59Z), 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/GBMA22459418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164ed75958983ce35f02eef5afaf4e3aaf24879128380dabb312374f854338af. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:27:38Z), 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/GBMA22459419.