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 0x58fc184273d3b352a803025d50da5c3ccac179584103387cfc6cbba4a65787cc. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ae57001f-b789-4abb-aeb8-17c5d45cb389.json and https://artists.proofprofile.net/proofs/artist/ae57001f-b789-4abb-aeb8-17c5d45cb389.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 0xefe40c2e0daa0aa1d7cd6d460c03345ce240863c6c185abc65ce0b1e2a42a6d7. 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/USNRR0600670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a902882ee7596af41eeb8fb6ded449fab48dcc720d6d203b01f5ad8c1ab894. 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/QM6MZ1864301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6df612a4ec8699fec48a2674db3b18b15ea3bf70015f03a9c6e32eae1bb5e8c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QM6MZ1864302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc02bde17f1789c2711ffd611541ec1ab4eabf4e011f885b2c10e91e8744d49. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T03:11:37Z), 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/QM6MZ1864303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115b2c3e4cd6dffd7b00d73190a693efea2a6e11de48f1795857b681b6f60989. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QM6MZ1864304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543736e9af2988459815e64a1b0ca94af133c645baf3984f87d61bf43cbc4acd. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QM6MZ1864305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18430e838f2e534b3347bb952a6cfe688c9b497be7487f5a86fae80cf2700d4d. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QM6MZ1864307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e8d3046210a735f304d3a8f361610c2f0d57b74d05cd878c69544b9b3fdd96. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/QM6MZ1864311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750878e444848d3285dce57b1fb04c8538fdd5e90551e66887497d28d7d266c8. 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/QZZ7R2577230.