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 0x51986ee387225ed3d8236b178aacd9b40b53faae1a5336baece8d30b84cf6bb3. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dd8f082d-4562-4e6f-b2ff-4f7892e6b491.json and https://artists.proofprofile.net/proofs/artist/dd8f082d-4562-4e6f-b2ff-4f7892e6b491.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 0xba96d04746c35088686b2bf8707ec4c8197441c50e21f5573efeaf1a4e13c4db. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T02:28:14Z), 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/KRF632406558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6211664cd832a13def53c897ccca65dadfab54eaaceed76e022bb4d79b8b7c0b. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/KRF632500641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d34f705e54ab4c200392d71a360f3a930ba279700b4373b37aa6bc9500a5da0. 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/KRF632403236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10cf577c70c1a89ec7b61975e24e5626c86032c39988aa8d68957adf19ed578f. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/KRF632405304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba96d04746c35088686b2bf8707ec4c8197441c50e21f5573efeaf1a4e13c4db. 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/KRF632406558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5760a3e5231bd87f123ffb1dfe79a9eb8a31d8cf2e1274463a1988288280bb5. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:53:52Z), 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/KRF632406556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d05773bcedb916d95c2a542353b2f76ea3ca6730f8b8c3e73c24fdcd7b5675. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/KRF632405306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb25a104ae8367e334a476feeb77f13c636bdee8e497486bc47d4a4fedfb09f5e. 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/KRF632500033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97612c9e241d507f0d68a43a72ffa5b12c26176e5fbed695653ca8d95ffe1e1d. 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/KRF632406557.