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 0x003fbabeb2475d54e1968a64109c98edad564bd0ef9b56ef6724a78ce2f62215. 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/9611a30e-eec5-4454-b61c-a38dcd3899f1.json and https://artists.proofprofile.net/proofs/artist/9611a30e-eec5-4454-b61c-a38dcd3899f1.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 0x5af19a6f8c265073a5c0da75ea884844ade025e6713c6c988cbe72db1f7bfe29. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZDA42164992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39702027ce4117ab5401654396e03db3382ccbab6abcf05c58314d73de1efcad. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/FRD0K2200450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d0203adebe7830b335d91da17774706ac73d2909f107e28650da5c75df2ad2. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/FRD0K2200510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d856d2b914f78981689b6d70fdf63d90051f567891055b8262e4308a01bbc78. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/FRD0K2200520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a7689231bbb20dc3a0657338a7273a523b6769639648822d291b67c2dde41f. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/FRD0K2200560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc18e6a932e16c6d0d1115a6a9ea9aa07fda0913098e22867eef59b09406f7d5. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/FRD0K2200570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b06d5d74150ea4ca26b578dbbbe6ac9f6bf9badc3e4415519a5052411d67266. Chain 2 (Bitcoin): anchored in block 957522 (2026-07-11T04:46:56Z), 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/FRD0K2200590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f7585196ea5af4d1d88d8350eca55f8c87fa750325f3fe4f10df79c501a6aa. 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/FRD0K2200610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c6a0a10a135b45ee325706c36e49ad9b0fed378fc5aad2bfae82cdcf4d5a9d. 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/FRD0K2202450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd440a3c1c64aaad56974a0d58b1ca960038495d20bf3687ff33641b5334195. 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/FRD0K2303030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b95f1b9c19724890c24cce7e63b4ca3a78948b58df7ae55e8723b9f79f17b7c. 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/FRD0K2404990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaebda750e60709aafc62a0535b957101585b14902f313251d15994b130c9ba5b. 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/FRD0K2405070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee68b4d5a86be722c200b6c9417482f8bc41127fbd5008fb2a2171f940995c73. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/FRD0K2405080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b43c4994451aa2436e7110fb5b7f91927ea3b754d1a802a5b5c65efcdbecd1. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/FRD0K2405090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc0b70795f1bf393e888e70bc66999952aba4d09fbabadb30d3ed13b4bdc1275. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRD0K2405100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012e33a40699ffcbe8c58353463cd2b358e3a8083927818fd84a836cbdf10c35. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/FRD0K2405110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef7bba748d7667130b7707947b54b0d0d343f3ccf3ea667632b9f29bfdeb6991. 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/FRD0K2200780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd436773d443b78935da96967239b63b12b0df8de9b9413becafb0a8556d7c0b. 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/QZHNC2428352.