Lev or LEV may refer to: People and fictional characters Lev (given name) Lev (surname) Currency Bulgarian lev, the currency of Bulgaria from 1880 to 2025 Places Lev, Azerbaijan, a village Lev (cr
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 0x0ee3f3ccee7a9a64e3f992446d46947e4b814e43c51bbcd7f35890b20770c77c. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8f3d93bd-f74a-4c13-a370-46a66c96d8f5.json and https://artists.proofprofile.net/proofs/artist/8f3d93bd-f74a-4c13-a370-46a66c96d8f5.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 0x91710b053d8cb5a5a4b389cc843f07441fdafaff7fd31c3075c979f0874e9fac. 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/QZMER2460887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd0cc6389972441c2617438a915ef3131e77c1d270b7688e95a792843970797. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/ES71G2216947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd514a2a9913138ff788c1cd0493ba02f42320b569789e6f218f892ff28d505. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZFZ32557361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd126af1ffdb688bbc98155f8935089dbe5f39b65bb0cb02724cb0227a54254b9. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZHN52550914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91710b053d8cb5a5a4b389cc843f07441fdafaff7fd31c3075c979f0874e9fac. 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/QZMER2460887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405ac815cfb9875a8645a88918333b413bbb234f9b778c97ea6509de549a868e. 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/QZK6G2575049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5213ce9dfd873b60448cfe394feff6b2a7b5320cf59b80ea68ed66b7e4c404bf. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/QZK6G2575050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc828f91d11946bbcafd227edab4ccfcd86c53327c683268ef3139d95842d66c7. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZHNA2576586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d33cb68ddf4a1298cf254869a3d77c94a0c01ea07358d6ce3b588407b7e8f3e. 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/QZK6G2575051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0799c01009d1c962c8de1d937374cb2d36e202b9c81ab75a5f6a3f346a9365e4. 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/QZK6G2575052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc15b04b22d7975f988d57a8d9250443fdc96ae392f827b0604d088ea1b39043c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZK6G2575053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf38934c839666dbda8fd4ab2617d74893845ad381c932f36cea4124260f5937. 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/QZK6G2575054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6fb73ed65b76158c51e1ad9537dde676f9bd082383ab223418333e650804f2. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZWFQ2420972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f0358aa05fa2e3deca6cf6cade01b0c74ed830bff69f7c4b3b508f23ed16146. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZWFG2405869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172d53f04ce62fdd6f09c4cf8185e3a1fcf9f67482efcd29f1548c83413df9b3. 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/QZK6G2575055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22bb5d8ea367bd390678c72a33b44eda0685ca62c51107e9d00b6e6a5a907b6a. 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/QZK6G2575056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd514a2a9913138ff788c1cd0493ba02f42320b569789e6f218f892ff28d505. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZFZ32557361.