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 0xacabdd0b1707e2537d6280bf32978faa0d0027345460934276ff2686c8def555. 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/c51ceb3d-b84a-4813-b95d-cc55b106b70b.json and https://artists.proofprofile.net/proofs/artist/c51ceb3d-b84a-4813-b95d-cc55b106b70b.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 0x08568682748182557f653e22ff177b193c4ea8e69a81ad67a45dc3e29c519210. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:33:33Z), 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/USL4R2158192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84cb546a6cee21c6084e97e9b335834352d5604d0828d90ac995cf976ddb851d. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USL4R2158193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x557ac04dff08277085521d9964dd25398a494e2fd20ab98fc33ddeadd9aaa275. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USL4R2158194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac694dca2250e1405f0da98d315f9888f9ef855e64a5c88391321c14bc543fa8. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T02:17:57Z), 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/USL4R2158195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9598b11151630dc6a494a4bce38bb2cc7991e013b803d376cf946fc1fd050f. 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/USL4R2158197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30be0b514390366f8a9720b0a1625de0649992021809b357d6daa7274155bc44. 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/USL4R2158199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcefedaef418dc2aafa033efa4c799726f090e04085b18df24d2fad62993cbaf2. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USL4R2158201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc6b77fecd0afb5b8879908a56d5a052a60e88bc5edc7a64d15a4cd8bc65193. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:03:00Z), 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/USMH92369135.