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 0x8abc720c3751fc729b6d9999117a68984c36779c3f91f191b8edf41968ad7652. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/adf4de3d-e9b1-4ac2-b541-b97accc558e6.json and https://artists.proofprofile.net/proofs/artist/adf4de3d-e9b1-4ac2-b541-b97accc558e6.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 0x1e8b7ec4ab827b5c3df84f8cd22e9647bc7d5cf4a1397bf034bb79a20c250215. 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/BEW491600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec33a7749849630535ec655e22dacf7e55a8a2330534457a7f823a98561d3fb1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BEW491600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1c38d0f3920b70e8aed002cb601d0154aeb108094ecd2291fede184bbc421b. 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/BEW491800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506bd36ca76fbf822168c940882917972e1ba0f6b8a617f97c6e0b0a9c7b0dbc. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BEW492000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b08a1ce6048389c6356973954aa3c9d4b7208c1f8a7a3f724a8f9cfd4fb7bf. 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/BEW492000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d8d8b77188e8c5c0b922c1f0fb637938f2834a9050b5f411c0136840b3694f8. 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/BEW492000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67793ad8d9da4a1f4e8e875e1843257886fd2ed382d01ba2f4a10201ea92cb7d. 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/BEW492000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3976162d2ace3ba2bc2dbfdf8e8ad589d9423bacb81cd72f8fa0b6ef8dbbe84. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/BEW491800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x472156618a069e0eb34d9e7c0148a43af10af3c1c0b22e9e69066e35e016fca8. 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/BED290900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e18a2e474e017097b5c9a449223c9dd0159e866491ec58d2e76b9a55a5e888b. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/BEB950600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76fbfa109c7457572ca71e837e1a4f3f6e907bba33a4759b29314b409292af75. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/BEB950600013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36350592e171db9b1c7678acadb22b5fb4c2e501f06b243191ae50fc75f8ce77. 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/BEW492500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e8a29c58d1a78169a02408d92491574bb7604311ea4f418d2e1f95acb4baad. 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/BEW492500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506bd36ca76fbf822168c940882917972e1ba0f6b8a617f97c6e0b0a9c7b0dbc. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/BEW492000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec33a7749849630535ec655e22dacf7e55a8a2330534457a7f823a98561d3fb1. 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/BEW491600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf219b7678a0f01f3194c136a4315b0053fc85bf4a8d681762402214fdd1206d9. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/BEW491600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858291b116bf63947b9aad896e067116001c68694819215db0efdc5befa5759f. 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/BEW492500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07ffb112752fee2d894a2f826cfeedf2d0999e8409ce189d386398a08ff0c5b. 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/BEW492500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad251cafd22e39b73810f23ba7137ef0a2b3e3ea4929e1a83306edc6b5c1caf7. 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/BEW492500004.