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 0x41fb41b703d5115042d4678b6bea1dcc209e0ab7ec636b535a81346f23963f9b. 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/fc481a92-d080-42b3-93b4-df453100ca35.json and https://artists.proofprofile.net/proofs/artist/fc481a92-d080-42b3-93b4-df453100ca35.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 0xc7632a91a16d7221dfd128ac993deb0de993b9abf96b502b5edd304f765fad35. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/FRX872434713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e5e3f3dc97c55d250e287f16bd794c23f1f95353120dd62ff13697333df51e. 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/FRX872469600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1963e6e1a1c0f8c50d73b69d6260a72a9a765611b51e5db1e5c014665479c70. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FRX452430130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a5aeccf6b48b93e0bd55eeef54a4dc5a881035d89398c0aefdc8de6d65506fc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRX282420957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080625a875110aff57a9d45129cabda30c8a8c4e073db441a2f5fe6bd748a1d7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRX282404702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f9731ab59651ad9cf3e6742137af7f54173281b806b9982f1679640a0b41c1. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/FRX282404703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a89134a328926481cdda19679234da109e7d7e676b6802064062cd1ca62c91. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FRX282414498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47724783d20f35a27b22107e43a58a65110e274712731f2a83bb985fb997c10e. 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/DGA0R2332676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83708bb6e1ec5c818faf31ad35abc3286b9e5f3e03f61a19a81791a65c5fa99. 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/DGA0R2332677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d667e2969eef54f678887923b53553852be6ad99d9e3e58d3787731143367a7. 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/DGA0R2332678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a9d0aae55ea42574ee8cd20870c2b5961cd0ad1d9fa5e79d558e12e8f59d443. 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/DGA0R2332679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6875710bd21adfab3ab5b688a773d7f426e3db18ba24f8bb366f789e75def45d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DGA062405656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a5673efe208edafb7ebbc17c309dc1fbcf34807559b6dfced79e69805ff6a03. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/FR96X2476037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a7afa76b41cfd4d83547105765836a1f93788bd2f839ed330e522c6f461af7. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/FR10S2435272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49468e1ad546816f783111c25524d537c70be9eecd48190dfca531319f513bec. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/HKG732434348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac6047f81c1e1c7fc50d7db2931f450be91297dad0d1e761e97359fe3feffe2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRX872437716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c4e8e6f7ef86d342664abaaa93bdf1b6a1ecf8d36328d946caa64d1fd935237. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRX872434734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24c0dfa20929af20e6b9256290031483f33e62e1d42858ced763e31ab966d9b6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR10S2435233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8db62e074bb110bd442434c35a3c586e882ff1e9cd37176182c3731c3c8a9d. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/FR10S2400427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc3a35ff3069372ec3eb51dc06a2e032df033fc00db958dcb60e375373f5920. 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/DGA0P2305815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c991fb43807e0f8127bc6aad1523e0da7d2f7733292f595dc9d7a2abab19420. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DGA052388239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba078ab37d0354bd1e4871e2985e6db2bf0c7ef1cd2bdf6ed49fbe6965fd520b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRX282329651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57589cadc89c189018da747146954c38bf5e066af174a0e32c692c1d2ce4fed. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FRX282329861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80beba53443fe35e4586bf1341816118c24869642f261f70353aa225ae7cbc36. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRX282315305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579fbb6eea63b3bd14a1c5dbeebbb6412733a9f0c6b739c808bb1f83ac6a15a4. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/FR59R2323631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3d2cadf3357afd460836634901c4a02f95715f484fbedce81e348de9ebfe14. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HKG732232217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d0b97ff9d8e95cc3116d989a6c942aa2b3275672ec0176149fe3c6616e218c. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/HKG732149213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a15fc68b0b7f2dc0b67449766ef89e10532a35a16f20fd0cec3ce725a890075. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HKG732128859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9669e8ace0e47de2f01d96735cd7d4b6707d2691b4d38e0835ad8bed66faaf92. 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/FR10S2542341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a988656ce1b1a10bed33e9f0cda724572a2a646aaebecaf093db8623806d0de. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/FR10S2542342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38bd1405ced0fe14355a15a199c633057da4eab22436f4f3d0e59755b246e706. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRX282537297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b979ac8eb1078ab6c65877f461d2b58283aaf3a8681260f9350dba05839a375. 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/FRX202575906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeec06e1ca9842b506924f3dcb7faf5331c2232169d805f4227822efa4535239. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/FRX202575907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeaa1cbaa329a045de794fc85cc8387b89d40f66207c50d763785030c7186b5d. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/FRX202585449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x988e45ed1e09b0de9213f405a6e461d5863fb703e4cbb70a2ea4f2ade031d9ed. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRX202585572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e3583e93d30e7345835dc9974b5b6a4fcbeca0d8e30e607c5e0bb1b0ea144b5. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/FR2X42530878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd36beb3d31b1c2f5250a59c29ab8e24a8dc8cbd46dcdee2d80e8c22432e6e9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DGA0Q2405211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3261882d834bc90480015f4040d86b2eb9bcfb2e7dc31203bc831ada3553ac37. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DGA0L2421152.