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 0x49ebaa6a9a0d3bb6aeb34718ab73b53e62d29466b8f61723eaece24b91144810. 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/f9ccf8a6-990e-48d3-b769-f6b3992a4235.json and https://artists.proofprofile.net/proofs/artist/f9ccf8a6-990e-48d3-b769-f6b3992a4235.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
חיבת הפיוט - בביצוע עוזיאל סבתו והרב שלמה נחמיאס
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 0x754e569a1f30a8a9a3f35f20e78f2d054901d913d5fadd4c002ce8d742af4c54. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZNWS2176233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3effdc4b70384b884ed91b0b4d33cb000065371cbd9784ce278df66d6b14b657. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZNWS2176234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3516dfc5510ef895307a77847418fc081df714df1fc08e1bf50af1b84e0c8da. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/QZNWX2156105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c913031eb3fc09679b86bb0b559118f28925267da33761156b665f194ebdfa5. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T10:01:38Z), 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/QZK6F2279150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9c1f898c3501adacfeed9b60504455718a660fac706a2bfbd6a1f6e5cc47a4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZK6F2279152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754e569a1f30a8a9a3f35f20e78f2d054901d913d5fadd4c002ce8d742af4c54. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZNWS2176233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9550c7e0be441e1d17e07f52ebafea4ea6b8094c222ca63a3ec44f65d20593e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZMEP2263161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8a1a83195514bb50ff75bc34f1577ea89eb8d4d5297dd70c80045a46a483f2. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZMEP2263165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c22c6bf0faa7afb3ce880a74c1d500113b12e806120f4736aba94c1a550966. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZMEP2263166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef1a3ba5c7abe1a7a2e3b0914706f7009ee676a6fd206e36a5280eb7117641c. 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/QZMEP2263167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a6015b87fed57da00a251518ad1f08f2541bd19149800b7a8de3e0700933542. 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/QZMEP2273757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ffc4333e217b80690cf1b9db329d254b1ff5e0b4ac2c112efa1f103ed25ba1. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:08:45Z), 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/QZMER2213487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3234355e6a3ddf7ad10b9f1d2200f3a76de05fa0fa073f0e796e4ed258e43ed7. 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/QZNWS2255089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff0ca3527d52c2125d04e01ba024eca7e49fea7fbbe54ac11355478f78db816. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZNWS2255102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x110f256ba7556fda706f07e81865f4e9b804cccf1b606349dbba66a2b6db027d. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-22T01:08:25Z), 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/QZHNB2470184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb98d84406d23952dd06214c9b216a0eed58e4a91f3a4404909c878464696bb. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:41:47Z), 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/QZFYZ2523363.