Lent (, 'Fortieth') is the solemn Christian religious observance in the liturgical year in preparation for Easter. It echoes the 40 days Jesus spent fasting in the desert and enduring temptation by Sa
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 0x60f327963e617a093575ad5161cfc1a8ad94d8c5a47864ad915585e01c05f8b1. 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/eeee3263-d477-4096-ab20-415a94277de2.json and https://artists.proofprofile.net/proofs/artist/eeee3263-d477-4096-ab20-415a94277de2.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70266463eba78e8573dec2daf00456ce97db780b8f471c92661523f37c3c8483. 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/ATUM71800169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3126c6948a3c529f9209e359cb97d0c5276ff6de35c69c21bbe31801b99b337b. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/ATUM71800191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e72b2aada2254d96b3c868a56077a2ff62a842a23448c37cf4c452edce5bd8. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/ATUM71900217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefad0a50dd05bcd68e618a6bc2735821d812a1a886d6d45be32e8ca6600887a5. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/ATUM72000054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ac8a7e336386f3c62fb0f098d7b0878b220df984b251cd245dd31fbcc7984f. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:49:01Z), 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/ATUM72000190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8837fb7a43bab6aa3dc78309d8610f98582aff765deb6af464d4323b51186fea. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ATUM72100053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0273baf394e5edbe955c27f3ea3c7f5810b440498af8c5866d2a4b03269722ca. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/ATUM72100141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7fffa27c9188f0a50267ce93b484cb093309062e2877ffc0d5adc39c233d8a. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ATUM72200270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ddaf8538d03bd53620571a479343c5507d34caaa2a6a77d32563b294b2e29c3. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:14:02Z), 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/DEZC62441370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51164bc8f0ecd163684e538d49f4f1be2ddbd33d9bc83ee30346a390570c977f. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/DEZC62461831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa05c5e8985548a5ae2fd87a0c168f0653b52856d7934047ca2c06ecd9be2c241. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:06:21Z), 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/DEZC62595734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168c170b52823c396e37194b9baf834b426fc65032ec2fc8b84cb06561fa56be. 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/DE1BG2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0179569a9be30311273e539bf817f1148abe569b89b83108e82edb245ec3a2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ATUM71800217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x729af3dcc48c7a1420d3dc406af02aa859c0ef4b45ad724582cbb066281efb67. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T16:41:26Z), 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/ATUM72000032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x909f71f78fe3b3075c4210aa6baefe1222877f781a08d2ba0deb700f33adc142. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/ATUM72000065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefad0a50dd05bcd68e618a6bc2735821d812a1a886d6d45be32e8ca6600887a5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ATUM72000054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70266463eba78e8573dec2daf00456ce97db780b8f471c92661523f37c3c8483. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/ATUM71800169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70266463eba78e8573dec2daf00456ce97db780b8f471c92661523f37c3c8483. 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/ATUM71800169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6102f0978dd361cb07be40e297957f870e607c218e6dfb9fbf5c6f8c3c580656. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/DEUM71902543.
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