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 0x2f5b6f5057c872b7af4b53adc68674dfabc5a9b03c9606a3600b1b75331bb7b8. 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/6f78ca9d-5fcd-487f-8af0-2dc47896f90e.json and https://artists.proofprofile.net/proofs/artist/6f78ca9d-5fcd-487f-8af0-2dc47896f90e.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 0x34b4c8175f080d05f9075b33b2b5d40d7115c03deb08ab348a43d5ae4d56227e. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/TR9891300139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a9a0fcd6e2f991bf4108eb004682614b3fe4c33d898f971ba2f6cad83019909. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TR9891300140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9513e7e6a63fda73c3b4c86db1190acdc65911ed82623355f60bf5af8f97780f. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/TR9891300145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4693be63766859c7a12bd9e3654f45357e23e96ef92143b3529212f30b44ff5. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:03:25Z), 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/FRX762161408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554056576ac8c7371e3935210dfbe477e958bc5bb95c1b765be61bc3037d39de. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:22:09Z), 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/FRX762161385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4864c287ec28efb20038cf6c76ecc0d3c411cd68a8c8015e0a412c2389326981. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/DGA082218492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d3370c8fee06c81b09e18d09456a60918d22de53448e97fd1923a5f8a5bc41. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/DGA0M2333923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb971f58b38940d1ad38664f326b17c65ae81dc949cea1ec2b3c10527d3d1d331. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DGA0M2333925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce496e0466d1d18de2da1497a276c87c27f964a0f2921b42f36d7e3af4a26b2. 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/FRX282424525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198cd7210f3556611522f81e008e4e3992e5c987c0d639e3a9f0a6f5a7df0f6d. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/DGA0H2407464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a9d5d68a182258298f3783cdf2c51621c3c7da7fb48a02ce6c16592e1dada1. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/FR2X42539953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3e51eb689d9f528515da82f1ecfd90d982cc54253478125d0c9e14181f9f56. 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/FRX452513525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff74821b80595549570e4d136b614394e8ed5715353c5e523b67f69f74fe695. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZNJY2542531.