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 0xd8fa54fb4ea408e58f5c3133143492b142f58a3bbdf18ae5b8771c4eb7e1c193. 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/adaa1510-9e85-4038-b231-1fc956c59997.json and https://artists.proofprofile.net/proofs/artist/adaa1510-9e85-4038-b231-1fc956c59997.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 0x7c4bfe852517d2533801a146ad2757998e6a53a560fda3a9c947baf5928d889f. 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/QZNJZ2472455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2827bc2499f25851f23986ceac564846000689600f2736b383e7216edd7531f3. 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/QZNJZ2472456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1133f1e71966f8440adedbb7669dd2b99be8911c9271804d38a42698935e494. 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/QZNJZ2472457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2eec9929df6e2b7aabbd5e80f1f96537a6779071736ed0c46abd599f015b4fc. 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/QZNJZ2472458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x469312fba30644d46e26f4a29a498ada4586c91b9d0763638c3480f30965b405. 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/QZNJZ2419522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x977498d18cdd65162bab0f0729efda8e5a7d2af421dc3e038a5250183f9c95a7. 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/QZNJZ2472459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f5d9f799ac20f8825604f691109a97b196b32275af7a823e897bb565985d0a. 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/QZNJZ2472460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4da13f57239655d3d3d8527d00302d9e42f9f5b67794441814ede93dcaa0b63. 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/QZNJZ2472461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf902ac8a2566e85e400de99f4e70570651a71fa4b12c8444a7903967b64964f6. 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/QZZ662335905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4bfe852517d2533801a146ad2757998e6a53a560fda3a9c947baf5928d889f. 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/QZNJZ2472455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2827bc2499f25851f23986ceac564846000689600f2736b383e7216edd7531f3. 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/QZNJZ2472456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1133f1e71966f8440adedbb7669dd2b99be8911c9271804d38a42698935e494. 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/QZNJZ2472457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2eec9929df6e2b7aabbd5e80f1f96537a6779071736ed0c46abd599f015b4fc. 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/QZNJZ2472458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x469312fba30644d46e26f4a29a498ada4586c91b9d0763638c3480f30965b405. 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/QZNJZ2419522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x977498d18cdd65162bab0f0729efda8e5a7d2af421dc3e038a5250183f9c95a7. 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/QZNJZ2472459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f5d9f799ac20f8825604f691109a97b196b32275af7a823e897bb565985d0a. 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/QZNJZ2472460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4da13f57239655d3d3d8527d00302d9e42f9f5b67794441814ede93dcaa0b63. 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/QZNJZ2472461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf902ac8a2566e85e400de99f4e70570651a71fa4b12c8444a7903967b64964f6. 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/QZZ662335905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe954c52b854872199e6df2f1ab5f1c4b2d5ce24aa0e2d74f733d4991e5cc35. 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/QZTVM2457608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7323b2daf6f2f6b81b0eb68e18698e9064fe9b1d9082558c4c43eb7eb110a278. 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/QZTVM2457609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2eec9929df6e2b7aabbd5e80f1f96537a6779071736ed0c46abd599f015b4fc. 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/QZNJZ2472458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5ea182f00eb201ea7d28e7cee1626f402cab169251ab5ccf479abcc12d1710. 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/QZNJX2558327.