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 0xd67beb20616af6a28fbe75f3d81ec52a7f7a2772e63075a2ee5f4fae13b6b0a3. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ddcc3b4b-7fcf-42cc-96c8-e8c41117d50e.json and https://artists.proofprofile.net/proofs/artist/ddcc3b4b-7fcf-42cc-96c8-e8c41117d50e.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 0x70a1159cf1a1d2e4d4f009ec0581fb2530b180fabc15063ef1b01a4fc3febc25. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/QZHN31909735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359a8f0e6ff4befd5941dfe65d5c8a0d9436c4045401bf7734dd9ef413b0feab. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:46:40Z), 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/QZHN31909736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31ffedb28deadf6014716322989a0b7f16c6c07b12c5d9c9a33b4a5e3443ed3. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:12:30Z), 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/QZHN31909737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86c66e061fa8a5c9a577452ff1f54e844be7c1f77bdfc0acad1141c18ef0a1e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHN31909739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8135a1154ba870ddd51fca2c316cabe97ae874650ce11d613a3b41502ad8150. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/QZHN31909741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a37ea3d31ae57e57760898d5132c5045e3d1948f9c328ab5c78e769f3707aa. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZHN31910191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea3d0b3ff13a2418396e5d6f69cd2221036d571636ed077b8cce6d203abc127f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZHN31910192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49101d64a136aec65cacd7b4e6d94fe1873fc918b9b3ac3b9b011228a5b4ead6. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:06:41Z), 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/QZHN31910193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e5f96c3c50fc99828167790868f75441d90723e35702c00e528218bab5d821d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZHN31910194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a3d57f30eb4775cf12d118aa26479b3ccc9b2a5fdaae73ae69d8b3cc4d1308. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:56:20Z), 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/QZHN31910195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e1a461129d61d8429f1f78eac47daf9dfd11c61c9cc204d252f0e0d4447c802. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZHN31910197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd01dca4024d6f85ab383ae8999dc6e490d595e6c66144b70236ab830c2cf6a2. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZHN31910202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79fc0bab80f7c6989be8241a4946b45c08c5df343e9a93d95489aa38de76f459. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHN31910203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b391854dad9c59e4ee93f9c89d89c1dd86ca55b29d21d1ba6dc3bfa68088853. 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/QZHN31910205.
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