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 0xb53f91ccf5b8c5d7675ca4135552a303a414dc7f3de6d52a40fecf0820079a4b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/539576b1-e033-4ad8-87d9-09312cb2eada.json and https://artists.proofprofile.net/proofs/artist/539576b1-e033-4ad8-87d9-09312cb2eada.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 0xec5b184bc006b9f3fddeed548338acd069cd8559f8237be22b5249c7434ade49. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:21:01Z), 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/DEAR41887618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x096d9920507bf103693cf83a61b9b63a647dd843383e5f62d6c60efb38fbc763. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/GBSMU6687869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0457986069110fad55b2f43e57f6109d21350542af9b1de6485c05bc887296a1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ES65E2200473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc271920fd23d0ba57082882f6d7348d6bd4e06e0b83a07d0a85ec73c5cd3a20. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/ES64E2206294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d34f1808ea2ab91349a043eee682a9c0386e08ec4836008b76536f1c1eb83b1. 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/ES64E2301358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9a989b501aac9c52c0ebc526cd34abe56cd0fa4c2feda524e8ac71eedcc1cf. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ES64E2301973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae27a9d7c173888876bef48fae1dfe9ef08d4d272310d6deafa28c06a77cbc7. 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/ES64E2203101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b56631b3ff88a5dd116910f8a40d4b38251890ace647df87724d6efbee95a4. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T10:29:34Z), 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/ES64E2302839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359bef5cc14146dbcfb84d2af601c38faf5816c5d17a08da89509eb1a7cb6b52. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ES64E2466728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6979d126491ddcfcd379db507166e16a1e9f3365906bb09f4282c0b498002710. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:52:02Z), 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/ES64E2505355.