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 0xc9e0c13880d89551f6fa83ef4c3c83b03a93c10bac662f7cb138105c7cb0c372. 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/483312bd-ee54-4e7a-be9e-616760e72154.json and https://artists.proofprofile.net/proofs/artist/483312bd-ee54-4e7a-be9e-616760e72154.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 0x51e43c9f03293926f92ce527cf39d5d63be4e52554323d81fac5c0721774dcd2. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/US23A1554435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f8b5845625e12e6eba8f7381651bd32ef904305c5c1fb67d1e7ade36a33cfc. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/US23A1554439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a0307febb2e040a3372b590ed2462aa99e634accf2d214bcb60bc8c78a647c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US23A1558580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2d85a0a86352fbbe29df0a5e5640aabef8b8200ed7dd2e93c75f6a08322d5d. 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/BCD4N2300130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf897c8d2bd8cfe000368c991cc800e9e2131be9308c08c947e706074d79faf. 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/US23A1562483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x743d8a3d31c2225a61558032ca7866348d5128092402b0df62a85bf37507953b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/US23A1565566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b6f7561da5dd77f08bb9c8fb00e0858beef0f4e28944de2d3f1023315e93d61. 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/US23A1568090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb61af03dd904e759722fc2703a24b948a079d80ba8639f98f575fe0e2c1d8b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DGA072347593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa35bc10bebda9b95e8bc29f4b27a7a91b217f79d5c4cf61c2e8546876224a2ed. 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/BCD4N2300246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84372eda3ac529af1b644dac4580d914db6544e61fc8572cb7951bc44f0e3321. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZVEM2382382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x211ed60a8ece98d5849421b2583fba1c57926aa9231c170d502bea99280d0c08. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T15:00:51Z), 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/QMFMG2326269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff5dbacfd2d34936bbfe1d4985df141a09422e8996328e0c9b143540cb1b0f1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USANG2467649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7610f6ff6384b44977a4d72907f42603dff4a64c2d9f49b65ac8a047d50ab1aa. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/US23A1595944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681ba960ca8feab0a273587895bdb14cd501bdde2e9942f42fe403b338fa773c. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/US23A1595946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f39eea03e5a00fc5fcd8b1ab7070380da85fab1829dfe2a665d8da652de63d. 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/BCD4N2200065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9e57e626241a6fa21f4f32954f168caa992d427c3652557a4b1c03c60a6285. 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/BXDS92200049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00bbfeddf3b60f2711f8c3eb6700892b71c32bff45431b0a03467b8b14c9989a. 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/UKZGC2303312.