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 0xe063f37a8a222ddac7de4d710c24930b97beab063555da5e740235ee60c614bd. 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/967a5424-fa98-4fce-a7b3-58eedea295a5.json and https://artists.proofprofile.net/proofs/artist/967a5424-fa98-4fce-a7b3-58eedea295a5.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 0xa435779dc4e46268169a7523e8563850f1456360149594b59af02d359c5542c2. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/USCGH1038251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6573bfc1bdd51d1a8098d86ceab4c41a532979d6147902c708bbcf064947ab20. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/USCGH1038254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba06f158347a26b514df5693648b677a63216b954282f37c73a72ad3ba9e4053. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USHM81168418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c5cae0ba72a8724cfcc8b5d7b3f5bf381f3486ac20da8dd8e5dadbcf3f78c78. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/USHM81168423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf8207f5a4e7de95e45f7f5fc7f672ea0c09075f6aeccf91c640fa922b3264c. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USHM81168424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5746c58f7bc00ff7ee87e41340c3bf94a876d5c6fc9fb3477c319e070e13305. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/ES40B1700050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dce0b3876c3f3d589a98ecac4cb5f66b46cc2e3ebc8826d72ac6307f53ef699. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/ES40B1700052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d2514ef0e434b8f4a0db224a67b4661f291b4e59f0f2116da1bd1170afff45. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/ES40B2300069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a70a84eb79f539a9905ef548a89a3318d50db441f1914a5f3f3df57d87a6e50. 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/ES40B2300070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb62610d413e0605c3871d4ec3b99a4e1fce557d571a6b2a31cb021fe79879432. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:44:37Z), 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/ES40B2300068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ca8dca4ae0e12ddac5bb69b5b475c30d849a16e18f58435b67ac76262b5d4b. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/ES40B2400056.