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 0xb4f9dfc619e4d79e5d00c77e5e9f131069146c1f2ff2123218298e27d88a0acc. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/15dd8f8b-84e8-4d3b-9320-6caf20064051.json and https://artists.proofprofile.net/proofs/artist/15dd8f8b-84e8-4d3b-9320-6caf20064051.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 0x2adc9c5df3ea24bce001a5d4e792c9bc040927ec996164a1278c4d5d3592b70c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEZ071900420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeaca1b149dd1042d1d38d5278f91344fd84da6bf4e3212e64c90739f65c13af. 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/DEZ071900421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a8ea626b52128cb3285a0d20fe087a2503b397a69d2cf576178559506908aa. 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/DEZ071900427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca05d1ae5772c050ae5588ab72a6b2a92aebd79a9e8f9046a0c3753a1a959c1. 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/DEZ071900429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b3d7235fc8f66d1c8e6cca37e6ee6a24ca02b7996b374a8911c1afdaf2d3a3. 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/DEZ071900430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4e2f9546980a1f5a2217fea699cec5f1f33a7ffdf5643217a80c53e63b6d0e. 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/DEZ071900436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf71abb07ca944e37c3814916afd3c5e506143f9f68223497c1c0fba6875da07. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/DEZ071900439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0dea5888bedb635bf851c96b35d7d2a5ae83970fda226b12a58c1370cb8170. 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/DEZ071900445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a24ad8792d96ae92ea72ae6ba4ee664969ea67de377337336dbe643bb6eebe4. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-07T15:15:30Z), 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/DEZ071900446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cbd8fa7d0aa19448d7ec9226dc343665830b5e328cd8a2d5e9c3cb4cb79e93d. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/DEZ071900422.
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 0x0b15942beed55e838e14a0f5faa880b26b0688713cca5502bf23552cc914415a. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEZ071900425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec896b7412a45a302cd22468e930fbee7d07bccedc6c014ae6c9ab8d33aa8107. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/DEZ071900426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe7d8b92dcdd592f07f773f506363aaaac60fc8dd539986e5b763da027ad670. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DEZ071900428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99149b845fa103a172ae93a5f25e3a22434b7563d7f3b7048cb7eac0ef52d7e3. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/DEZ071900433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6fc8c1776f81da3ce6f130e8419df9d1d14c2657b481d1e76054188e9cb6307. 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/DEZ071900434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe892ed7d05008eb0a6e1f380760e3fe694b2dbab09cbe6649f1fba62c499393d. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/DEZ071900437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e43352ab9fbe169dce195b1e7a3d9f1f036facecc5afddfdee31d2182c948e3. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DEZ071900440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b18c4a2ee15796004688ba1b2407ebd7218530bb79398c2c2b0ff7d9e643e0. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DEZ071900441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f202c793658b42a96d1c6451531bc7045240004717ddcb08ba98f138ad92070. 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/DEZ071900443.