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 0x6aaee1e0a768c90df28f7da78379b25e78cca21754b4c1a422a555c83ad532ef. 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/9d436202-814f-41cf-9bfe-8d5e1910251e.json and https://artists.proofprofile.net/proofs/artist/9d436202-814f-41cf-9bfe-8d5e1910251e.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 0x973cf421049ecb625dc3a4d8b663fcf183200394868a942d462d3b94805805d7. 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/NLG6Y2300096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f0950d10b714f2367ec4e79479fe4ddb921d68d710c2e7e1374bf0384a15d3. 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/NLG6Y2200117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b082e430051273b925883e012eede0e076d5aacd394ac0acf29a69eb8d38185. 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/NLG6Y2400115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7b80fb265446ace8c8457975154397288c10f39b83001c8df4e75c840f7128. 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/NLG6Y2400114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35e97dace528ce4d8a7e4bfbdd6a56ef4eeeaef5bea292550560a862cd2fb45. 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/NLG6Y2400113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06162f058bcab5bde3b816ca8cb76d0d1490a39a076f1a3202cf1443e4aecb0e. 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/NLG6Y2400112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd895870d2c57a254bbf2bc5a607217b3b720692126773c5d265d59b768cef7d4. 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/NLG6Y2400111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94750ce6d4b2765b88736e03d45cf898ee5bf044b661f0f471e1255d78885d3a. 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/NLG6Y2400110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8859a3f5f7dc7fabece95531d1be431c3b67d82c7484594d67a4796682e8ea3c. 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/NLG6Y2300100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde785708770a82b75aff2c4fafa18ba422f7b169875cdb892e3524546e75364. 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/NLG6Y2300098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973cf421049ecb625dc3a4d8b663fcf183200394868a942d462d3b94805805d7. 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/NLG6Y2300096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e86d7d3e1e5a03e34e8eca7c36eb6aacd04792f3b71785e706b451402b1ba23. 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/NLG6Y2300095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2691dadc09324bd00fcb0776de8259675909bf1bf6b213eee238473a13f7bcdc. 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/NLG6Y2200118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f0950d10b714f2367ec4e79479fe4ddb921d68d710c2e7e1374bf0384a15d3. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NLG6Y2200117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa2f4b4d08777f2c7fc944c324b49a09cc07e9b9d3f5b8510f4f8edadb15789. 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/NLG6Y2200114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35e97dace528ce4d8a7e4bfbdd6a56ef4eeeaef5bea292550560a862cd2fb45. 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/NLG6Y2400113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7b80fb265446ace8c8457975154397288c10f39b83001c8df4e75c840f7128. 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/NLG6Y2400114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb67d23183059b9a937b2a752f1b851176449267c2208a7308f159a59c40647. 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/NLG6Y2400118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b082e430051273b925883e012eede0e076d5aacd394ac0acf29a69eb8d38185. 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/NLG6Y2400115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72700702303ed16fc3ad2d135e879c36503861dcdcd733957243937f0aeaff73. 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/NLG6Y2400116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06162f058bcab5bde3b816ca8cb76d0d1490a39a076f1a3202cf1443e4aecb0e. 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/NLG6Y2400112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd895870d2c57a254bbf2bc5a607217b3b720692126773c5d265d59b768cef7d4. 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/NLG6Y2400111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c244a46421d8e916c9656522d96920e28b9f914dbdef6aa3313eff91af5d39. 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/NLG6Y2400117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x797bc7bd2f223b860e7a5ab5dded9fb17c810088ef7db9d0a86cc5ead43d985b. 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/NLG6Y2500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7b4ba1bcc98a5b6dee0ca1566396291924db16863edd9d277ba528c03e697b. 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/NLG6Y2500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c244a46421d8e916c9656522d96920e28b9f914dbdef6aa3313eff91af5d39. 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/NLG6Y2400117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72700702303ed16fc3ad2d135e879c36503861dcdcd733957243937f0aeaff73. 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/NLG6Y2400116.