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 0x150b37942f409cd0cfd2ec5a15d1e75e27c56ad426728c503905359c0d5074a7. 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/9ba4833a-4f49-4c18-be4e-5314aa51049a.json and https://artists.proofprofile.net/proofs/artist/9ba4833a-4f49-4c18-be4e-5314aa51049a.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 0x46b1fc34625e40eeca05b3ea9e3e62ce6cdc14cd64e6913b576fc13fd9274f8a. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZNW72401119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e0e958cc53b39959bf4672db82bc15910a5b68990fb86c1f206a1d6ca9643c6. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZNW72401132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeb069f0b2386104b8b788ca248f5544cb8e087b11b120b71be3cd87fca8c598. 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/QZNW72401128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33c1be6d77bfe66a4c947b67d026a1753000c2fffac9d267e12bacbb51abae6. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:22:20Z), 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/QZNW72401130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7d086f96dbb9a3a405f2734ebb3fa3c4937bae8bc2e128b39f9ac4ca641ee4. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/QZNW72401117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a93dc2c0c102762c8f9ad1e09a42f5d32a015adef26512e9b0146ad4f5ab06d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNW72401131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36dc92507e4bfe8232431f2f7b770c3edc3530cab2cd9c5f028122e5da589f11. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:40:56Z), 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/QZNW72401124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd637110ea56b5ef7ff21154c4fa9942e48439f2b05cea4874ec0f40e05453f30. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:45:47Z), 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/QZNW72401133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360f988c8d342903f8d91739b085053bfc5e91dce907957d552d71eb3dbb21bd. 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/QZNW72401120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cca14996899097baffd4f8aecd3ca600e8031d5ca8f106e5bfdf5a4ee771758. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZNW72401135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x009f4984612b26a1e2446520fd48b3315a2868cb112737825fa25a4c60ea6fed. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZNW72401127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a9c847110c63bf78ad10b1730c67d01b357961231dbeb9e0601a7bd7479b52. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:45:03Z), 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/QZNW72401136.