Heisa () is a Syrian village located in Sinjar Nahiyah in Maarrat al-Nu'man District, Idlib. According to the Syria Central Bureau of Statistics (CBS), Heisa had a population of 272 in the 2004 cens
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 0x13c47d930c6eddd707599b759dd5ab0c2ee9e7e73be30bcbbf16067b0dc6bc9f. 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/4f672156-958b-458c-ae2a-e65a6701d63a.json and https://artists.proofprofile.net/proofs/artist/4f672156-958b-458c-ae2a-e65a6701d63a.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 0x45350cd24c9ed9c938cd7356590b5635f095cfde920d34584922ebf59bd366a6. 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/BEN582000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd749fdd66dd8850e4b0e86cf3a39822ed69708fa560774631655b438c7c10844. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/BEN582000046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e9642e9eb42c7155db421c3cb54a441dfb8185bc101ac8880e14868d4fd894. 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/BEN582000047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b926a2e5e5adb207099deca0dbd809df830053caea9184c7ac5b82379183e95. 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/BEN582000048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5cb26fa6f2565e3c03d3cd8dba9f4d378730d586e31ee289d809500981dbec8. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/BEN582000049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99b3820c5d0d72fa66923102d7c7c2c890def59541be608f7c7f0f3b9dbfc85. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/BEN582000050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed257996fee4518fcb0d00760430299ec56c6c483468179be6cf29030bb7e85. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/BEN582000051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd026f9a231715c73acd631b0a99b9cc385346a6290c28b058efff2ed6df2b17. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/BEN582000052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cbc360dddcd936cdef244a51aae7cc75bae3b377b100024eee9176049f692e5. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/BEN582000053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be7ae4c71e7de6bdd11928d8e790f0aa08a0a61f2214cc38ba821d5baeafff2. Chain 2 (Bitcoin): anchored in block 957249 (2026-07-09T02:31:37Z), 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/BEN582000054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd698703da78d1da6bdf184b05e3488407190867cce5a0517536fc254625f335c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BEGX11800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc08e654311b2721c5950d4052fcc09e405da62af79d6530fad62f738ff5b53e2. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/BEGX11800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf40b5b7fe99b99c75691d3fe4596199eab806ec006d1f893dddea4d75d75df6. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/BEGX11800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd594df323a7403ae5d1ac1338d6c9841f557840daffb94690e0dc70f163308f9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BEGX11800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd7e4ff022406d35a7f990ac100030dd1d0e11b42cc6112e25713770ca12f64. Chain 2 (Bitcoin): anchored in block 960306 (2026-07-30T20:23:53Z), 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/BEGX11800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62983fc1b1ec87c4571b62bd66ceb3a788f1f128c93a68abaceb5c271149403. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/BEGX11800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c22fc2b32a10cfa91606cc41f9669ba893e2d1b51bccca7e18b1b27be5c60c4. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/BEGX11800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce9e4e5f8edeb6c0f84e3efc2eb62a1dc842414125ff451745e6f20c49944038. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/BEKE52100041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9491ae64971d79354659570efddd768b793fc518fa1b66eadfb1a439c78446. 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/BEKE52100042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd377f50b21b04a6b2aa2415b577dceb4a6bb014e7d275a863a8cbfb1dd66ac. 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/BEKE52100043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15fecc78836ed65120e3bbee8e3f64f02490fa2892fd2e3608c4705beeb9674b. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/BEKE52100044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dca480e379baa806a101e76926d8d3046ee51d2d2c93708b7845f0aaaf7de32. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/BEKE52100045.