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 0x16dea7327e61def8a6d80dd4c6710adb5afb529c4840e4c918bf4fcc9e64a331. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/adbd70bc-5ed7-43cf-afce-57d79e8dd500.json and https://artists.proofprofile.net/proofs/artist/adbd70bc-5ed7-43cf-afce-57d79e8dd500.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 0xb9875dfeb003db8e2b79fbfa96d2aed66ea725579506099a2e65851adc4c9cf3. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/ARC571600460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde15bc38051a3e3f3daa14be70dbdde08cf69efe0a0adf75b7e3a0e6e63f3c8. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:08:59Z), 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/ARC571600462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa19009ece9399c1d68b4af0b3f51e8fd1c217fa3d4d64fb3727f8cc5116e2adb. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/ARC571600463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c8f0202446511730592ca1cf6e7de0a66e3413ecef229a9e58781a5231bdbb. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/ARC571600465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4a48493fca199c8f0cb639897317140e568c217f6e330d1a91ea1f272bb669. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ARC571600466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47047fa2f728baa3ffba1044ff1965b0d6849a05fb91e908ea78a1f23e1807f. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/ARC571600469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb5e362e5089382abfc487ed331a5aaa2db2ac44bde1830329fa713b06076d00. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:23:32Z), 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/GBMJG1718521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd43a769f420727f26752b2f2b7c8fb7a1485201af0c66715c8ef2b05ece0bcb. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GBMJG1718523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e2a4738fef990bf4152ba1b3573c22cf07e9e90f0dea3808abbb863b12a38e8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBMJG1718526.
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