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 0x44d256e642d6f6f256a3a16d5f4c246e2b47e1464a895b2a3749c916f236b3b4. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/74ea938f-ff2b-435f-88f5-5b04af0e054b.json and https://artists.proofprofile.net/proofs/artist/74ea938f-ff2b-435f-88f5-5b04af0e054b.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 0xd883c2dda7a01b7997e42a59366ce68c6c21374200c859c58d972bf1779d53be. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BCFSR2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd5585fbddf780548b5480b0ad77602acf585e440ea56ecb1bc4c75ec8d5b95. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:29:29Z), 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/BCFSR2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4cb9356e37fda42d0929dcc5fde9067741a08e17c900589d142be6d8944bed. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/BCFSR2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee5e6d794a763936e54d1b334425e524d3c0f408b0b92aa82ff48b35ca7049a7. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T03:03:52Z), 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/BCFSR2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f4ce0ad7b69e7c890e5c69655ae5ce58f4e0f82566df154b88c3feb6a1af42. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T11:21:32Z), 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/BCFSR2400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b650bfc2ed0866d61bf37d471ea7197401479be27db8503d9a30167ce5a3c0. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/BCFSR2400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b300ff087b835dbf2964737154c431147760fdd048e1f3fc8158143ec1dbd0d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/BCFSR2500030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dce7b5be15abde8936b3f6cce935696405fc89dedb8ce06f34de5976c96d38b. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:02:29Z), 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/BCFSR2400031.
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