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 0x45839926c4975a5159321eb1eb16c2cc15d61d715b8867e14424a7c6b27d5f06. 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/6e9306fe-1813-4fd9-8c81-265773a7b76c.json and https://artists.proofprofile.net/proofs/artist/6e9306fe-1813-4fd9-8c81-265773a7b76c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Piosenka z szabli mjr H. Szczyglinskiego
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 0x1b09421f6f70e807db5f0ae3a8c213dcd5e1ad3a7f50c51de98dcaf15e12f22c. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/PLL131400113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109f4e96517b8617d5918067ad8a2916c2778f6edd4a5ac4c3d2250256aa7e73. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/PLL131400248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae1a86e7748a836c29c10b9f9d99eac78d11e9a5aa8855378a891762cdf273b. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/PLL131400249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5789fe7a88b56c5529822f2f7e82170f996a84f34d78d8dc2ce54a5cdd9a27e. 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/PLL131400093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c9d7d6672bfd7fb81cac2e3e502fa3e02290612d148ec8341ac109aa84744f. 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/PLL131400102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e18b5a8f6affa0355e39e60df172878e2d860cc6ccac3e43f8ffefeceb4c1cf. 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/PLB171302705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f742fac71ca6273546782c0413f5d217c81d63f19e8bccdf1fc4a1446f6544. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/PLB171302712.