Lobel is a surname. Notable people with the surname include: Anita Lobel, Polish-American illustrator of children's books Arnold Stark Lobel (1933–1987), American author of children's books Bob Lobe
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 0xe5328a6358cb36381004fc8fcac92bb3b7ccd87fc905fe90c0e64578e4f2b208. 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/b7d286fa-7c67-46ce-ab76-23138f27f39b.json and https://artists.proofprofile.net/proofs/artist/b7d286fa-7c67-46ce-ab76-23138f27f39b.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 0x050a04abfc62868f9797e547aa944e3fe3f63b8f9b4591ecdf13cc3cc758c9a1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM6N22115018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5c30a03d7e90898c415e2a188f32f24049b69812a34b36aaa7dbf121cc9efb. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QMDA62124128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb89da95e5e4ca44560ab31c4ec5ed691f4bfd2211fff0234cd2b2823d4525cc4. 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/QMFME2181909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x474d368f74404befa9d3c5fea37a9efd50d3fd6f1ad9af0bfe3104e1c192bc4d. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QMDA62124899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf29de119b37984d63bffc75ad15b4690d51b8e6d043f0ae7af56f25a5db46541. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QMFME2108229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1bdf11282cf14f975226856b79ddc9a1d02216523b87ea7fd666b24c6ec719. 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/QMDA62240160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a090ca084a1ef5c1e373db50b1d3a4c4b93d1031d67b24cd907985c67776ce5. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ARF472400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994e64f69a2108f5c5af81e354b3598d958d69378c62cd0116b44441e33a433a. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/ARF472400039.
El Muchacho de los Ojos Tristes - Studio Session
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x522efebf889d70edc9d8e013811646bb41a1bc95151f73224019c74f0dcac3cd. 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/ARV932400031.
La Marca de Los Amigos (En Vivo en La Trastienda)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33fe16d7d10c51d37e49e9c620efdd950f847bd503696bf9102ef90a91f5c019. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/ARF472400202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15c78ab0a2b700475308866930b9ec7e3c4077ad2ea5cfd9bf381b05f26c8d1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ARF472400208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec4c11be79f433b9bcc6626e309ce949a3572a1fbb272587be28ee8d75a7555. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/ARF472400203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394ede6cd497239768625962982e29df4700977ed5d599e8af677162571d0c79. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QM4TW2356161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f049a64631cb1236a25b57827c36493877930eed86be529931ecb0e544ee63. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/ARF472400210.