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 0xb26f35ba8dff1ed1d5e5e84fb660ac3c8d29f7ffbb3abf095d5cc35f87e57424. Chain 2 (Bitcoin): anchored in block 953701 (2026-06-14T22:16:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/75d3c5ab-c402-45c4-ad5a-ce2b37df0f07.json and https://artists.proofprofile.net/proofs/artist/75d3c5ab-c402-45c4-ad5a-ce2b37df0f07.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 0xc685f13e28aa094078133218ac4d1024a360cc3f85fccd59689210b06ac40015. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/PLB231301597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe472c8c3caac0e3c4de77fc3e92196f00125390313e5814e48b8e2bc2cb0ffff. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/PLB231301607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa31b94fe46046571ad75b850d2fad0c4cfa634787948d329f375d02a23e5b1e0. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/PLB231301614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce1d8aa24fe65835c38ec1476758a1bdab4279e5fa0c5dbce2643e37f985f41. 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/PLB231301620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7508ad5fa16e4c2658ead5f52c313784e6023621685eb2168c82b0ba6075ac5. 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/PLB231301621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc283e9232d94deccfb84a000b4947d8a4258ab8b748b84ca0163e20bb40b03d7. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/PLB231301623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe7f1cbc9596895b86d64d324f884844343733244e0fb10ff6c30968637a0475. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/PLB231301627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5c9867736e4129a1f7d47ea204c9acd8674f3e20ac4adaef475bea6921f196. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/PLB231301631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf1e7ff83b2b816ea08a8fb848e58fa4a360698b7e622b4525afb4cbf50e135a. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/PLB231301632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b8c8a672a7a48f1e8cf8298d65d5f5c04bfa94fe0996f156b9115c3056e930. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/PLB231301633.
Wieczór z Czardaszem vol. 3 (An Evening with Czardas vol. 3))
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e4709acb0ad250e9eac3703b6687e1dab5baad3de72f58edea3d83a0d23ef9. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/USJSJ1024643.
Wieczór z Czardaszem vol. 2 (An Evening with Czardas vol. 2)
Wieczór z Czardaszem vol. 1 (An Evening with Czardas vol. 1)