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 0x87f22eff7c7c69bb0374127667c417c093d0549e30a05f8608a8ec4b646cc21c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e5401023-7567-4bc9-be2f-9672676d97d7.json and https://artists.proofprofile.net/proofs/artist/e5401023-7567-4bc9-be2f-9672676d97d7.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 0x8a7882de5fc7b9663830744575bad6b099832b7f666d16f91c855477769597ce. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:33:36Z), 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/USA2P2031589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d19cfa207583b1c34162187e2cc799d32b9bbd0c708082f3f898d28c2a4ee63. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:04:00Z), 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/USA2P2031590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ec76357aaf7a1662c4f8fb17babd5aae03da75594c1f218afed1443179a775. Chain 2 (Bitcoin): anchored in block 957695 (2026-07-12T11:16:12Z), 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/USA2P2031593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa371569642d5f5a5c093964b66b5cb393dadaf3f4d50bcd0d024cac2f33f06f2. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DES560895604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf443f138ece8c09ae9c9fc5940d65cbda009f2862b21bc0e450dad04da140320. Chain 2 (Bitcoin): anchored in block 957688 (2026-07-12T09:52:21Z), 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/DES560895606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74adcde2fb0e6850b918802ed7cef2a3dac9c00a051b86a4f0605d3cfb1f43e0. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DES560895607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7bf65bdf1d5e42e3a05185964f9daca0629686ae89df6ea32ed80a56da7b498. 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/DES560895608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc30d4e1d38ca5c4cf776a602e3b1bd07465618afe3cac8cfd4164283efd06c. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/DES560895609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a018d5f730d7bbfc7a134998c4b567f8d02edb84c1ff8509a9bba6f6ffef85a. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:23:27Z), 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/DENP90600232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52fceef0846f5f45363b517c20672e3cd850a20c4d70a10bf4f39f80c24f6a35. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/DENP90600234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fdaa77f7882b4d0f9a05eff25aaa3f400f8343276623f21700e26b3f73064db. 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/DENP90600235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c5128dc967d3de4f75010f87826ee5e68a036ff5286268115dd8560ca37879. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/DENP90600236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6281b223567f47132763d76ab4c4d9d1086e3602b3de393ef9f04db6da296411. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/DENP90600237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5f4d7c7ca3fb8c1eabf6ef64527caa65c47453fbee9e1b92af52ae0f80aaf2. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DENP90600238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1248f1229f41737923103efb6fe34db3925780c24b32767a88a0f669d8e019f5. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/DENP90600239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa25dd9b5fa697733dbabcefed61dbb7331c6f00b0e747e3ab271f5767095167. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:04:33Z), 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/USA2P2032926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bce8e42952eca16e1053efcec53f5d5628ea38c61875391c2385ad351072085. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:11:19Z), 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/DEPI82211741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05d8ade6cb95d471e09512148019216f1eaa4bc32fb99ab73b06dc8a4492fab. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/DEPI82211742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d870dc7c8841cf13a445a7f0f96adfae4fc90dd61d46222c79917f14bab518. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/DEPI82211743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c720bac73280f97e130348f4909eb4c553b24c03e8d9b7c0d51dfd01400692. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:33:29Z), 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/DEPI82211744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fba9e39820dc8821de6c54be89a06dd5e213ce766fcd34ede2fb38918b49629. 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/DEPI82211746.