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 0x6b621231df14f86d5fd2c5394427d47f37042e2669e757e2b595f284e4bdd4cc. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e724397a-26c9-45c4-8630-8426b39e426c.json and https://artists.proofprofile.net/proofs/artist/e724397a-26c9-45c4-8630-8426b39e426c.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 0x54faef95f9781aa4d25bf2a4012f7401435fb4777dcc7de21b8c54b4c8cfbdc0. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZMHK2595760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1cb50f15b0d4b2103a502733fde078338aebbe15b4fc277614898409f9725dc. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:20:31Z), 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/QZMHP2516443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057a10976ac7a07ce7c74b1136c2ea35137b1b973abff043494882409378a59f. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:38:46Z), 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/QZS642580962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0e6e1793d1411be8d22ee3eb253650e048431e846890904a7ba2789d999f88. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:08:56Z), 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/QZS642547318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7909275ab72f42072b032c167276fa80e9587f01f003bc2900b3fc5a165b8c3. 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/QZMHL2586348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7850611109912297692bd4fb49ad1d9a5d1f7f65875a7989a564c600652452f4. 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/QZS642584616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9665cc5d414c8dccfe9bbee56971ad104a015865827fe7e767fcfed75c259a66. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZMHL2596629.