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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 0x8dcff883d2c8fcc7eb3d4393feb5cde2220cbae964a4c24a0e591f87cdaa9842. 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/dc73b9d0-8434-4205-8265-936e5f7b6db0.json and https://artists.proofprofile.net/proofs/artist/dc73b9d0-8434-4205-8265-936e5f7b6db0.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 0x72014e7fe917a37681ed9b36e9756b49437bcc1ff11c23c0495f886c7db3cc22. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USEAX1200813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70181911c3db813cc3a51c66410c84138fa0b156cc4563ec11086988c698025e. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:49:35Z), 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/USEAX1200816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8bbfa676b4e77d31e5b7e30cb89b982c31833dfce61a2994882fc316709823. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/USEAX1200822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf6d175a56b84baa00fd55c208faacfbc3ffa97dae84dfa12c0600d873a47d53. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:34:26Z), 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/USEAX1200978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25f9eb5472ccb9b0ab8a513bcc5dba8bddcab12262553ba56de43309c3a223e. 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/TCAHT2322272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d44d15634a14134a097e4567e4bb3c403ebd2c1a3a2c61277f85c7381f4557d. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAHT2322294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde7287ac3880a94e4a22b15ac2ad0954d4bb1acb424bb8853d4a41960a5f0d1d. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:19:11Z), 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/TCAIE2483724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785263893a8773a3c5b20aab89da9fd7e40b2efa66a2eb4d8eac8b58e18364b6. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAIS2483857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5a095e58bba335c2abfe70f077e7845bacc5e6ea3f14259ef8bf84ff325b22. 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/TCAIS2483871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x182079df80000c445ba95d4fb396407e070780e207b28ece84846708c0aacd4c. 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/TCAIS2483911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6def93b84e249256ec905b43b3e7e7d9e45301e9de411270208eb85357b58ee. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/TCAIT2483917.