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 0x387ee335597c0fcde634b3b2435d8a93a0a0190781e284afd2e3e5ce51aef16e. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e73028e1-a37c-4084-8f66-10353389fe7e.json and https://artists.proofprofile.net/proofs/artist/e73028e1-a37c-4084-8f66-10353389fe7e.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 0x4638498e271fb6b1326e7cd5bf5a5d08b62dfd76dfe8a2f2c348ca9178207093. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T13:39:11Z), 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/IL1012300149.
עד שהלילה נעלם (מתוך הסדרה "הדברים שהלכו לאיבוד")
מדליקה אבל לא בשבת (מתוך הסדרה "מי זאת")
טרוק עלייך בורא עולם (מתוך הסדרה "מי זאת")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f5e8c9ca0a47844426e38397824a1e949ce8807f3e545b1c7b044a580ccc17. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/IL1012500413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c26056ced0e85d1489c502d87be927b01d28fb6644b13594cbf2abf8e45579. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/IL1012500377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87025528d8a8d0893ddc3125e2a4fbf85f3d4f3b448d1f8af79211a164a5792. 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/IL1012500378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c3e63fc7f6b240a10ab99a2095c65ccf60a3420c89ed2d67a5ee0037161e9c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/IL1012500379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b439755466f0c87cdd1dc4268dcf149138df1266484ee4ecf4d3bfb9868818. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/IL1012500380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ee39b2c1348e2f500bf0f5aa3e64fbb4ac721851ae976bb5a7992521726254. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/IL7532513308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa65238337ffdb9961611e5f269ec948ec8901591a0232afebd2f395230d8d3f2. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/ILUM72500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f4b91f0266253a513ff39d20eeaf8472dd9004c78d0a5970095349174580a4. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/IL1012500642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce1898a35978a6d7cc2717709b6cd10e2a44dcbb57c38b2e11bda2284d7ba137. 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/IL1012500643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0645080b3d40392b943eb522e5fce09a898c7a28272579977841c01bc107d5. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/IL7532513331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade1f6c0c9368968fd326c8eab075770ee4856070e9cd5c531d7af9464fbf493. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/IL2DY2500161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce1898a35978a6d7cc2717709b6cd10e2a44dcbb57c38b2e11bda2284d7ba137. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/IL1012500643.