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 0xf68b2d12c1c85b77beecd43fd0258a1ffa83484d80ae192de75f2c0813c559a6. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be6e79fa-c04f-4a80-ae87-b829a872e3d2.json and https://artists.proofprofile.net/proofs/artist/be6e79fa-c04f-4a80-ae87-b829a872e3d2.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 0xe93478364d710b9e6d77bb2ca7139c91ee5189c75cfa970f434ab69a3cb797d3. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T03:02:10Z), 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/NLHR52165499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a748beb3333af7b0a642735f09640c915e6c28ee34a07dd2af8a966fcefab1. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:02:01Z), 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/NLHR52165512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8fbf6dcf19855a71b8ffc4146b167968cd3a42da984b48f45f13f53ed7c10bb. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/NLHR52168186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd77e3ae386c43fe3b09d52502fa3f31588c4545d20d2c4cfb0c9d199e9d2ac7. 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/NLHR52173356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05eda0ce7651dc3ca13ef6d8c8f06c372222a225203bca8e79d734e909717d9c. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/NLHR52180221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459597c615c648d5d7ada4fe224b83bebede8e5c485a4e1983d66474a95b4268. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/NLHR52180222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340096ac13a8c91730d7d413c7369aab08ae724d4c18713a732c8783f64006db. 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/NLHR52180223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cedcfe0fcf96f60361acb98c345e2cf2d6e6585a79474e287a8e22a8434f861. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/NLHR52180224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bba9c405a3b385eeb1b80659058faebcb50ac5faf640a73dc6f6390a686a6ee. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T14:02:03Z), 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/NLHR52180226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2580c9d0f60b9f54bc30421a1e640b77b88cc8a23a426cd37024b56631b8cdc8. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/NLHR52180227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4cf8cc2a88b76eb9d0e861501562c0d26740295dcdacc0282e7d2e5a80132e. 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/NLHR52180228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8148cb3f68054840ba1b071881de605e02786adf854a7d5042038d587ec6959f. Chain 2 (Bitcoin): anchored in block 957620 (2026-07-11T22:32:56Z), 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/NLHR52180837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda06322bb45119520b4dc8eb193ef0a1c7c6d18931d2a7842420d22ce6633266. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T03:05:42Z), 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/NLHR52190118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09fa98c7a509a6b1afed66ccd42a2351610fbd991e8a7fea923508995357723. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:36:58Z), 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/NLHR52217572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe39dc184dd5f8145538835f91991a60a3a258c3370c23a8ff0c114371c3f4633. Chain 2 (Bitcoin): anchored in block 957810 (2026-07-13T05:55:46Z), 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/NLHR52245893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2584635c6f35590664bc67777d507f84330ddd992d68048b99f8431be6d0d701. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/NLHR52259662.