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 0xa63d6607cf6b9dcccc99d9c9baed5a06a7c0621b203c844db3654f7bb74c2f89. 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/f8debb5b-313f-45b0-9387-f5d52c1b6f1c.json and https://artists.proofprofile.net/proofs/artist/f8debb5b-313f-45b0-9387-f5d52c1b6f1c.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 0x9fb835ca782d18c15600abf4f358f1fd9d76b64fb364c5c92d845622bc09ae0f. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZMER2175269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf626a3366cacc3f49bd1d295aff7808c15f073644b5b6d9c4b57d741ef9a1174. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZHNA2191919.
Gulê-Hê û Hê-Min sorgulek dîbû-Min dî ji wê ve tê
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547a070104f4890debef0fadf2c60943dccccb53286fbe0bd2f4230ab709a756. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZHN92184035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e5474acce7db53a8db37657cb0008823eea0540d1421b00b3c0d514fba8f28. 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/QZHN92175963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4204996a75d77431f1350f3d3c6ca3a4e94fb5c225f1db27b026fadf98a70498. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZHNB2133005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd659fc636a870e7e3c73f4e50bba49af60fe41c19f0e8e18dd450ebb22df81. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/QZK6L2109528.
Macek-Gava bimirim yar-Kaniya ava heiya tê
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176be285d0350dbe0bd14eb6642be4eaf30a56e0d8da040bd47e197a5da48a12. 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/QZHNC2305045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a6092def2f79bd4907bb3436bb8e2e973e0ec5d637309c7da6213489f5c680a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZK6K2370475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc07ef5b79c48962c3ec5c759760822b37b83b74cb33642a0229a9c9cbd0332. 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/QZTAT2315661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05fdf2e2014962f77133cbaa10094df4cd36871f87826751cadb94b2bf737d57. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZTB72359644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b89e7c5adf02c41d9ad04c21e1db1967e4a7a1baab710df5f02709ef005b80d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZES72558536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe730a90d3e4a9033ac56341339d8b0a62b18ceab8ced7e69d35339c9aa4187d6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZK6F2561864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac8de371b650bbfdf978e22fa0e356fb618f4feb93137292f63101eaf6e1319. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZMEP2525828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac0d73ac46ecb64f8ca52a29b36caf88edcb78b5ff4c888df8a7c261c374ec5d. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/QZWFE2517417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cfa7d7b4c6a1e24f1d8bd74c04c088094a4e5f3d5546b6d0254f5f256f9030d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QT3F62559758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac42e2aac630b812434add1811583df2007bb77e5eecfa779f816f0127e6a80. 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/QMFME2550616.