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 0x3d0d93135e4d7cb42ca4729f7be4e58c591b60d1d89ff05ec170e512ceb17ffc. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c41e8dda-4da3-44e2-8195-c15dcde195ea.json and https://artists.proofprofile.net/proofs/artist/c41e8dda-4da3-44e2-8195-c15dcde195ea.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 0x0168ede7fdc6aeb469432a068937736c09cb4ee1d697991e874d72b1a47e2503. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:30:33Z), 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/QZK6K2357588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d3ac81ad45fcc1ca9625a9445925638cb997e64a87ccc1dcc6063341602254. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:15:54Z), 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/QZNWX2399193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5237f8cfe2788ad0543c5ca55d27f202097894d315973e6c3c731a36966886. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:37:28Z), 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/QZK6M2342876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e494161c1a47b12a6e9687df4b8193d61d699de9a8337967f3d601e58972047. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZTB92373266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc03617044591dea373282912cf6eb191e4526d83feb3d80a2576b15403856dc. 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/QZFZ22458036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f9cee0e48e0113ba8bfd0c60177c7bccc9d66980a70ea560e660a83f500e94. 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/QZFZ42466314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995cd8f74a442d7546e2024737622a0b28618750036ecf6453fd7c0d7c2d260f. 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/QZES52433164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6c98bbc3e08554c3d7c00a10f5eca55a567ee0b83bc4b47dcbedd4f0f0039e. 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/QZPLS2438656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c01bb05de25c23a0887cd79191212d1e412a4d270955338c1b9d402fc94f52. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/DEY472477327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d3b8dd9615bfb0707d4ef0581c067770efeb3ff58c7f079bfbce6bda9aa4ef. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZZ7W2463087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163c5756d6d94d13841a10e254608c1efe534c37283b875f997b476799d168a7. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:25:25Z), 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/QZFZ72536282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aafbea735b70084fcd110b11dd3d976ab3391fdb09f4e531ecdcdd141d45cc9. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:43:17Z), 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/QZHNB2555624.