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 0xc59aff43ee7c88497919bf5538cc240c81cb4a22c4184c9e97bfed927bdad556. 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/a23a6a88-e0f4-4408-aeee-27e410a561c0.json and https://artists.proofprofile.net/proofs/artist/a23a6a88-e0f4-4408-aeee-27e410a561c0.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 0xd2498b15b2b741db61b89cd5fe4483f9fbf1b4d57ac32ace16ad9314b8ccc348. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZMEQ2429019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ac648b68c258b4718aa5a488bcc4cf28e8a8decf30a981d2b24f1de6515b40. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNWQ2437234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc319c33934541af88d08c3a55ee1d8872f7151b51cead61a986540e5963dc033. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZWFE2398182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36066df563ef7909dbcf4f12b0c103535571cb65b5f15985b34d0da2e81cd2c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZK6J2339858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x856b3863fbfbe5b062f1c47fb210eb3189093efbd8c91bd2684dfbe0c060fa07. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZES82302889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa2275805af9d9b6992f0dcd016dffba324cbf97539d701f4662a8c7ad0763c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZDA72335371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a28c6ac527e35138bce833f9c6efdd6ce62df927ff48bd7a9529c1171fbd66. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTB92247059.
失恋ソング沢山聴いて 泣いてばかりの私はもう。
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab0bc683594a90eea96b7b7cf6b6e2a563156fe20007091f22cb93c315d5c75. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNWW2230187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8394f9869ef2136a25fb0590181a3a6370476b9c98df17a0ecfbbfc7c9ec6a40. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZMEM2213291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e367f5e79c0a8178ea6d769af49cd4e1bac54bf29b3fd3bcac56152529d118. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZK6Q2265011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e6fa7aa5cecc5bdbe597d8290234a186556b02a4c274006d02021197c9ad6ae. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHN72213184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd44ed8017cfb1166918936c6904ad5a046b4476308ba905b48be646d967bed. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZMEQ2429016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa907d95fbc2eee3269c7e6539805448a6d0b70e18f0dc243b9eb0e5f9fa1a47d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZMEQ2429017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14cf6800be5ab8881a60491758756007747ca16bd6ff87430e8295b99259a52c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZDA42478671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba6d8d10e9d6e34a35a4dd5b7b67f9491fd5e83dbd32e7e73151fc68f6bf322. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZMEQ2429018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf92417555caa992753b6940591157d9b59e299808e8a2e5db94bb788358d61a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZHN42432976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2498b15b2b741db61b89cd5fe4483f9fbf1b4d57ac32ace16ad9314b8ccc348. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZMEQ2429019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9ac54f03942cadf5f92237b22317a2870a8565c933e0a52b1035df50c10c6a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZMEQ2429020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e4581c369b54a2839eb1a08b710965db9cf12d2a5e079c6e5dbc1a9860b4aa3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZK6H2445725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd48b315f08f4198bad09f52801f9ab396c47997576b1b23a8dd2cff2d05dda4b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTAY2383608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1319d28be9d7e32aabedc6358d25da16b69370f2151e34130b9386961c02c046. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZMEQ2429021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d45ed1ede0525c498b868a96e56b9ac9342c3c35b27c1a731a6503d1b724a5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZES82335291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ee1fb61ed0227f3555d111a481afec1813117434595fdea07fdfeaa952afe4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZHNC2258982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f95f8a3150d866210e515df8c71f4c5967236cef0a67b49bab21e79007f83a4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZES82335292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x856b3863fbfbe5b062f1c47fb210eb3189093efbd8c91bd2684dfbe0c060fa07. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZES82302889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82d4c3985ce7b066e7df84c23c3b5219091b65aeb6a4d421c95bc6c7ef1c6ee. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTB82234593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5030c59015a198cbb7ea1bc7189fa1e279ebb5e81c32d14e5d70a15c855cbc5e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZES82305413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x969224644bea1a654eb20c9b29121300a08617bbcd8c82201bac5af1be88ee88. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZES82335293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b4045682c4e8ddb0376916e80ad4d761ff1171a7560e323ba572633bbd20b0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZDA82362458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff1e8fbe077ae6df425d65295755c88814b856ffd53ba7320fdfb0df586e80e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZPLS2220010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101491c7155d0136c6c2062e7f239798104be159bb02cc7612ba752278fcf9e9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZES82335294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b4045682c4e8ddb0376916e80ad4d761ff1171a7560e323ba572633bbd20b0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZDA82362458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11957552df07c5ec33125480c9a3e9194dca16c5dd5969fe46787e7ee39351f9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZZ7U2481971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb2749922942bc3629800ca599e16769ba9e105aa6b9789ee242dc997e5d27ff. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GX8LD2214040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb2749922942bc3629800ca599e16769ba9e105aa6b9789ee242dc997e5d27ff. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-21T17:21:19Z), 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/GX8LD2214040.