Artcell is a Bangladeshi progressive metal band formed in 23 October 1999, by vocalist and riff guitarist George Lincoln D'Costa, lead guitarist Ershad Zaman, bassist Saef Al Nazi Cézanne and drummer
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 0x88bb05d51bc91f8a8eda6c7ebb1ff6c148cc77a41983b86cf1274d74a9d32ef5. 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/220c1dfe-d931-485b-9445-44722abb909c.json and https://artists.proofprofile.net/proofs/artist/220c1dfe-d931-485b-9445-44722abb909c.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 0xd928730407fb70438084d991b86d892716f21e987ec8fc251eba849c504d168a. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/DGA082285912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1e8d70774399d028d52664919ac3b7119f2113c2519a759531b4faf2ad6783. 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/DGA082285914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4c5219b66943726405d26916f019d58cbb2924fd9b457d4533063c2f46b796. 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/DGA082285915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20705b969273554f3ffddcc870d2d9265137022fb4b7fb857678c3db31b59cc4. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/DGA082285918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dcd1faece668b54a412ecd1b1f69f1eac614ae1e5b7153b814f0422d42b32b7. 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/FRX202310065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700f85b7577fda2b216a5907920362b08c6d18872312f618ee403e9b8b92ca9c. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/FRX202310066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e44f2613ff8ab41a92656cc3ba8a22272da6b5d51659c2cd08a3dd20907cc3d. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/FRX202310068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee1ec33e3e6831ca67db45fc0ca614aef46384b6105c1c1aed0c5b497c5afaec. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/FRX202310069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a34bf1f204017c1a6b7663854b5fc6120fe202f55b14be74c5dfceefed38e1. 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/FRX202310071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb076f3b969d2eceaff519a2c91277cd2ed7d6a020cab1fd434e306fb53a85faa. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/FRX202310073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403aa3aad42bd22d9e70eac97147c0882150e519d1d88e948aae24faa9859ecb. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/FRX202310074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150172313b97d237b4db7e900eb69406f823f2e8c258baf204dd9682dffbb692. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FR59R2358348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x136cc776ad17b6ed2f08c9e199197698a97d291f453d7e6d4226002f31574a69. Chain 2 (Bitcoin): anchored in block 957622 (2026-07-11T22:55:42Z), 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/FR59R2358349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb96f604eabc7c63c113e0e2b4b9327dc9dee0fc2f02714e036c73e51516271e7. 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/FR59R2358350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x484611be104b9742775c62b67d485616fd76cbac7c198dc51c09c93b33b40758. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/FR59R2358351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3db6d1b7134c2f862d4cb06164b8036e44dd830f071d7501bc4134a9cb7e55c. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZZWU2500238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcec97cf3f78b6824acc96fb2859aec7c6ed8db0167bfe28a4989379d0c09a18b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZZWU2500242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44dc0c463282c97c6c8835bfc828e5a8d883342465b8c9e71e2e54f8b1521b5d. 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/DGA052353879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66434dbd373c48a1101643cd18428f3c1b9e673152a78252fc8859a42ced1524. 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/DGA052353693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x061e63b6e5a6c6e2f58f0866de9605d3a96386e2a047229605a6431b46915dd3. 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/DGA052370107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3970dba5c712c27c196c1ebd9d3bf0ba1eab13d9cd244f647bba482131364d3. 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/DGA062349219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98244c79d384c6b63abdc1c29e1fce3ae617fc9d81cf6af8ce621c352f7087b. 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/DGA0H2373824.