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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c138ba5dd7910caaf079b36084a7192b2856f8bd26884c12a6856891cb37cbf. Chain 2 (Bitcoin): anchored in block 953636 (2026-06-14T13:03:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/360e67d3-c407-48c5-b233-336d2706106a.json and https://artists.proofprofile.net/proofs/artist/360e67d3-c407-48c5-b233-336d2706106a.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6bd83031765484f97a8311d6113f39d0478723aca2b83047315a20771f275cb. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZFZ22526407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f32673ea5302e3676fda83f526ca44829e9e700cf3400aaf36f6911c3490b99. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZZ7X2440910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa886b59cc43b611cd0bb6809038da1371a2f56c6252811b879670109e3f0ca3c. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZWFF2453789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0daf9c0d83ec46db38e94afa10d3d3ce1f28c97e65e7856d1cec73fbb6255151. 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/QZWFF2453791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5690b8c71a6254923a57fe915bce14475e3f3b4891bcc6c55e530131f2c2dda6. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/QZWFF2453792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa429b1b509039eb23cd7ca9dff514d0acc08c1d42cdf2bcec93162883810147d. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZWFF2453793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe38f4ea1c0655ba0d697dad7482d319c8660d3f23ddcb58158eb689fa108e9. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZWFF2453794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ff31759d00136a9f8c313eabf702c813a32d5b473eda5a3a2dd1fd9545c827. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZWFF2453795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb73ecaf923512d85fa0d6c02e6d19ec725bcfec0e0b234a274f758278cd742e9. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZWFF2453796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d585fb4737cf50ff6e989001ae2d11dce3d547ee6860f933c4dd66233f8629. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZWFF2453797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0619fff5faf7d41e256598512371a197f943cb03448306f7461e4975a091a77. 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/QZWFF2453798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac8cca18ee6a8a2aaec19557c15c73450cd0aed942f238f5c218d541498f2a02. 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/QZWFF2453799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80048b29a96704664193437da6e859cbe3808a1001d778a0448b94219814ab8c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZWFF2453800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5e362a34d3befc26262f0e1a32e54fba5ff175709572007c600449d50ba59c. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZWFF2453801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ff61311952eeb829ade756aa73408e793b12b80cc3ed7b2082135b23980cb0. 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/QZWFF2453802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013261a79c77894cef896df630bf9d85f863892509b05abbb4e1600954f7112d. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZWFF2453803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc63395c4f88895dd8d19753ee3db91349f7607f657c114a1f4f8c99ebcdf03b. 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/QZWFF2453804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe093c78cf161cf60388dec43975b461a2317b306d776c309fc5024430ef08bb1. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZWFF2453805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c1bd8bb751b02fa6e223bf12924274d42adc38c381479053f7fcbdab782285e. 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/QZWFF2453806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x017670102b7417ef75e418623376a4c7d3a17d8309f650ede6591612a1649b77. 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/QZWFF2453807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e188092d9bb2696eca4948710e16c56f2f6265868a79fbdf52e7d28790fb54c. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZWFF2453808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb011af909473d754c4c6fece41c22ab83f557359255ab6c4f0be402a84c6c608. 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/QZWFF2453809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd55768b45f2f56d7ab83c5a2ce558a942e830b6bcd829f2cb046ea739d32d5b7. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZZ7T2499768.