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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105e605a14af9af52d9cdd9fed493d3369a2723f60fd5f097648e4da4f40dca7. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a825eba2-40b0-4b8f-8b56-8005150ff760.json and https://artists.proofprofile.net/proofs/artist/a825eba2-40b0-4b8f-8b56-8005150ff760.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Richard Strauss: Así habló Zarathustra, Op. 30
Sinfonische Dichtung für großes Orchester, Op. 30: No. 1, Einleitung
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6effc6a6714d9b97c4bcd9f12239d9fd4078958181a03dec328c9c6b213d4d21. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/ES5331407396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425bc8af0d27894443f0ac980638e2e134ebf4dc048da4cc5eca73b19f138c38. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/ES5702000638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8405a3c78dd6d9e70e8b522486185e85dcc26d9399a5e2782552d6fad475b89. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/ES5702000639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e94eb9ae40ee0e48a7e96bbf7e2f90bd623c2d15715be4cb1e20ee94d22463e. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/ES5702000629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3156f9a68d2d40e56d88bcb60dfc8c5c45b473bc1aecabfb760deb54cb0653a. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/ES5702000640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b8365fd855a7405577c2d072c2b19a03affcc9879994f00faa4a6052523ea6. 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/ES5702000641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f19e844bec23b7b66b1b6851c876a8eda1d82d312e41d7a48e784abd746c6d6. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/ES5702000643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b8355ae78ff623162cbce1e530aef1e852a5c4833229e2c3d6a0b1a02397b5c. 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/ES5702000644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa280423b8a2a0904ea0ede1a3a476db6378bca5e7e9117c0d7349d15758638. 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/ES5702000630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0f8437704d7dffb6375bfd7542cacb319dee70929f6358c3ad2ba3e1acf87d. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/ES5702000645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92c632e582c80ff98ae094ae8cd23926b13be05c03b30466de7d0a4168daca0. 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/ES5702000631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02943d5ab7ce62f5ce426fa4b26e1ba1217521a35dcb9fde6f42260f22578a4c. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/ES5702000632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb059d865ff42f1a297d7ae92d82d6e30fbdff8ed07281b13675becdd26e77e2c. 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/ES5702000633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398a90e6cd574dc20c6363eb78ce978072f91f9db3bca309b9012bddf98cbfec. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/ES5702000634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc18047e58d74592bb817980068a1cf8d6e82fe874ea124476399604581376c0d. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/ES5702000635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9431c3582aca6445bcbdc2300f5a97f8f8cf688fe34cf8719066e4867b894e. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/ES5702000636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b948b3735201ca7b8b4c280128a52dbeeccb3e9070858fe71b5cfa4c086b4f. 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/ES5702000637.