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 0xbb8edc59cd467669225170601310f646e39be823f066e5fe924a6e0660cbe7c7. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9d0a1a0f-5bca-491b-9c97-9e749f12e3ed.json and https://artists.proofprofile.net/proofs/artist/9d0a1a0f-5bca-491b-9c97-9e749f12e3ed.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 0x085950d957a0f7248348cde65dcee688e86dc732d4612e9cf46f4481b132ce5b. 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/US3DF2273001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1e0e802894383f7e5fd96981282e2d6ed94c0e5f79f46314b303c6b10e34db. 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/US3DF2273002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00898e8962fa08b580ba5003bd66003814285eb78f1574965856d6d65b51d84c. 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/US3DF2273003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3010aa86ed67fb4f75edbb008ce92727ea95f50cffdc6fb306876116820a2aee. 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/US3DF2273014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0474d0fc214945b7d1248b454e4cb5b76e5b260279443676d3931460466a01a. 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/US3DF2256187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31753bb085db794c57a6c55e1d6bae55c3766230aff2a34fea95fe3826ad548. 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/US3DF2273006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007a30463b93dac2e902a3f7aba9ce2c129f8c1d12895bb8ccd876ce61dbfec8. 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/US3DF2273007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ed462df7e4ea970811df1171fcdaa09407579b4933fcdffdc825200403c987. 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/US3DF2273008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54007b8e64159801914a7e2534fc17d8c110e9817c18432f87b4a5aa7e2da977. 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/US3DF2273009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54ff8f79ff232a092f0f5539fb10c27c58d123e159375d8139565b66c535b20. 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/US3DF2273010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b73920e16e0cf67b33cd5ee2f6b61bfea03073dbcf389cb768d0cf28de820b2. 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/US3DF2273011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6182c113166d115624cd2ec4315524897eacddb6814eadb14cf089636b1e5380. 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/US3DF2241307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2207abb2e1b04198b750b434252e96a2c5da6d4341eba945f6fa39852cf832f. 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/US3DF2234182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8297401ccf27e7a93183af3fcfa3977087c1293aa59c4661a35a4d72ed5f28fd. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USDXS2400243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa88c182b99297b68706184ea05967cc8df0809cca286d82f831c2e714c85b9de. 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/USA2P2501269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c566a80b470c7cca22481c70ea3f8a087c7b66bb3f0b31e09856aef3c1fecb3. 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/USA2P2501270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x182fe591aa7c3b50456c34759565d41f22833259e48157964f4478dea2ed4cb8. 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/USA2P2501271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c9eb16fd03c284555721ba4060cc659842031e54a19db216f4a22a31a7b764. 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/USA2P2501272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf85269feae2bef67d4044efc9e33ba7f1e7452d10f6e04f56cc94cd7856793be. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USA2P2501273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25f74db59b5cc0011bae572d0bf6d00b99207db46338a69a012fed8d0f362bd. 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/USA2P2501274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325ed52ab89f963c213d218f335887e17d295a1dd0a25668ed940d4e6ea2bc7d. 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/USA2P2501275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dddd8b7ce291375e732c680bb1e372f6a25984da792d43a13274c52f3c8a445. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/US3DF2550119.