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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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d1f84e358e9888e07affae35c899aefcb47d69524cfcd4763957a0820a2d8d6. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1c086f5f-9c8e-4de3-a8fd-dffbb3308571.json and https://artists.proofprofile.net/proofs/artist/1c086f5f-9c8e-4de3-a8fd-dffbb3308571.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 0x47d317b3593e912a074e067992d2e8c7ac7c6cd80da2a1d11a9420868e121888. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/SE4XN1500101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2645645879c7f9d9f50d84927618bd8ebf5447cf07163a1b6fa40642363c4c0. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/SE4XN1500301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10d610d34538d1b9d8341894ed70ef9621023cd8d0fa785a577486bdf5b2ecc. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/SE4XN1600201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89c65e68528ff0da419a7ef767c18a97f5025395859a83f13999636db6c6b74. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/SE4XN1700101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7104e1f08747f7a814098b268372bbb02afefa7059cb90e01e6b286c98bb1fa5. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/SE4XN1800101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a2333564b79a542762a00b0f1cb6d57ae874e514d61a12a8f8822204bd38d0. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QMFME1921934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d0ed47a1b3d59e8fcb6b9553382184598c1754457261beabba4890f4f9926b. 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/QM7282009045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754e6e55fee3f0499da0e9afd490b6a4bfe0ae6b04c5075e5787542e9067c5da. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QM7282025118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ada46077d67e2342166fecb75678f3aa1af607a29880bd6cb75109ef167e48. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/QMBZ92042922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46dfc1ccba5347f8f0aeced90eef94e0c7c9c7e80ac70e9ad7a7a1ee27410914. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:10:08Z), 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/QM4TW2140538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cff8e8ff6a33f57009bfc28a2a5fda5ccde80e87ae3e1545e160e13d33e91ec. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T08:00:28Z), 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/QM4TX2118310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a26fa4fa803fdfc7a1d748a570d0bd05c2686eca4d3bdd5addae0c524ab133. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DGA052399240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec71149fa42be357ae176b6f0b7ef42fbb2a10bfa46c04356fe9c90da33f02c3. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QMBZ91939622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd4f8a92c1cae4783e5afce86c91a640a081f5e5276cc74c58679360082ea4c8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMBZ91939766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f035dea9c3e7209a182196ab06814eee7aa6d3872dcc3d4e939c6fe66db793. 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/QM6P41971915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc255f7820f3f20852a7cbaa857220fc2236e0d428e026a04a1a1f0af2a8f86e9. 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/NLT2H2300049.