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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 0x875259b0710160fc219d58b00ba158ceb61e0ab5f7ea2751cccdc2282fdb4e0d. 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/b2db501a-6719-4942-80e1-c772ee63b589.json and https://artists.proofprofile.net/proofs/artist/b2db501a-6719-4942-80e1-c772ee63b589.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 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 0xb9d5444e365a415d4d24f17d9cfac70e5c07e14f62ff124740af70b80656f225. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE6XW2356893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac822c03c9782d62d1ac99a1376e2afdd7c74ce56ed9ae9518732af3b5d615d1. 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/SE5BU2399819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb8954b19b9c58e1eef257ab50eb9493ff9c60873e979e4a7f65e9eb577cf19. 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/SE6XY2246434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc57e6b7a0d167ef764ffb57350c9ade4c361c4c54b779b3f0d48135f3d29bfaa. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE6QE2254774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d12bb2203a1403f73dbaa2155e8bc62b6e344b6ca0d5fcf315cdbf6702ae16. 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/SE6HN2210721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9159cc65d12b19c6026aa4c029363897c3f86ad9ed44921532da8e95c3742b1a. 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/SE5BU2275745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e324e16137b79df2b8fb7ad26b394b9dbf884d7ffd5098b5847b0bf3b884744. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE5752183996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66983886d904a06fc46aab7c793352e2a5acf639745d425f2795065817b4f2cb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE6XX2138254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc434dfbf2e91a518d9a647bdba297fe29507b7af225a98b9d6c6cfff62275c7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE6XX2138257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1107d7d5763dcd31646e908b43681def9ae633d150c31fa22513a1a33ad89019. 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/SE6XW2168949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a6830cedc1cfb7f9a24db948ce75a3196e8c93f881999776eb19f31fe5926f. 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/SE6XX2138258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195fddd158201440c92c65de274a6e6639e44bbe7dbeb0f6abf095e700d933f7. 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/SE6XX2138256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe02cab0e087011ff81f273351a1b479c50a0a00d9a5bb9d5574c9fb88dd9a381. 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/SE6XX2138255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1107d7d5763dcd31646e908b43681def9ae633d150c31fa22513a1a33ad89019. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE6XW2168949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5669fbbd71eaaeaf52a12580404de2a1e70e8983414e843f69de80a350ad3da8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE6SA2191118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x294aa1fdf2008906e9e9b4f4f5ac0f2a0664ebb6fdc9402098efbcd34a425baf. 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/SE6QE2142620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x206d5b61331a5ed54df29c125a9bd1e0a7e68a11919bb9cb45552f41f2f94a09. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SEBGA2001360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c310527b50b12bf9488ee3be9c21165af6255f278782caded837b04b8628ff. 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/SEBGA2001058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce20d42b18fc81d7c9bcf95ea2abfe96c9b9aa8264baab74fa9a8b5e713576e. 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/SE5752014172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd18e26a7f2976502787800d480dba1f23171cc4a1c0e7172b4f87516872201. 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/SEBGA2000769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf86dff270e921c717177290b68bf803b2c18863ec9834b395fd184359164258. 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/SEBGA2000523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21d7f1d9c240b3b24921d5f448ce103b4e2e95fb50e8c2d4ec45ec78d9e7147. 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/SEBGA2000284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4caa77b105474202c82311b48d2b401091cfadda0b42329d611a72a6ca9f4a0e. 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/SEBGA2000139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1df6e4158690a54f3561d1f7faa3512f0633e69ab5edaabaa05635ece01a84d2. 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/SE6I31949362.