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 0xcc0ba5e1524eefb97a7e4c2b658a8b5e315eba5a5bc52cc06690ae544e58965f. Chain 2 (Bitcoin): anchored in block 953599 (2026-06-14T06:43:55Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0c13cae4-259a-4c3a-a8b1-651ed1b0fdb2.json and https://artists.proofprofile.net/proofs/artist/0c13cae4-259a-4c3a-a8b1-651ed1b0fdb2.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 0xb5541c4184c260b7944b573b3bc86625477c614d8b086bcf275ef6ec1756ea0b. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:24:54Z), 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/QZDA61814808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a80b1b38c3c85965c7d90c885ae1b64df572598cd1417d96d48d5776819c88. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZDA61814809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5261d60e46d4142cfc84c5ca0e140e272f09562b2a6d8365ec9bc16713d6f3. 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/QZDA61814810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee79464248c3085bd6cc5ca82059dc97a1ee3bf1a59eb1f2ace4832c33e2f42. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:27:43Z), 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/QZDA61814812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3a3e0f6d048c4f923d1e1274586797024e744e84900cc84f6828200cb06350. 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/QZDA61814816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a16232f76ed4fd71078aaf1a5df03b1e3144e8d09ccd8cedf23719db25324c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHZ42065333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f8dfe2045f887dd20d2c9fe1a9c1e0c7da3292858a6863cd592983ee440b4e. Chain 2 (Bitcoin): anchored in block 957699 (2026-07-12T11:51:06Z), 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/RUA1D2537662.
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