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 0x3c797d1f8a15fa8fe59e343f5eace94418f08b36acb0d4fbacc06d9947315e48. 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/c9052fa5-f8f4-46dd-b6f5-7acfd8005467.json and https://artists.proofprofile.net/proofs/artist/c9052fa5-f8f4-46dd-b6f5-7acfd8005467.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 0xf1bb6445d08b78369e95a50fce5c3fd0bff7b3f03438ad899dd670efa33cf930. 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/GX89G2246293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe3808de7bba31c22e2a73cad5ec432030db5459346e58b6600c1e123fc910a. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:49:33Z), 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/SE6SA2206749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46a37aa03c86df46791a7a40f0cdcc25e5f07cc9fee0b5ea9bf26c337eba72b. 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/GX8LE2293765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5605ba9b6042e8ac89aa9bff8e6b3b38a79ddb072dac128efa5b70649105f62a. 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/SE6TI2352440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae7fe10e91e05a8a22c47d0281a93de8b346b70ce20d1f93ec051d466303efa. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/QZNWY2439577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x507adee984b1586f82bda095c4cf8a7ae1b26073e644f22b44352a1892db1040. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/SE5BU2410926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8790405b136eda1406f1ee99dc2a46a20f72923b6aa8466648f7fd25b6319bce. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNWY2409179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x764ad227d01ca7f88c0e79ecb49897e9e4429ac7dd1314741bafee019de7496c. Chain 2 (Bitcoin): anchored in block 957595 (2026-07-11T18:26:17Z), 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/QZDA72504942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa586b74d88bcd3844a0a3d417ceef3c4865cd643b523b541f5e0b7b1f9630ca3. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTB52521405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57407556b1453b6de85d0bddf87a7f0ff16c4fa4d6a1c932a506fdcd5abb335d. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:34:22Z), 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/QZTAU2568476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f1fc50bc2b1e73b27b0ff2b4d3d556437c5d4afe23d19979a5d63009a701f5. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:49:01Z), 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/QZWFK2588594.