Closterkeller is a Polish gothic rock band from Warsaw. It was formed in 1988 by Przemysław Guryń, Jacek Skirucha, and the vocalist Anja Orthodox. Despite many changes in the band's line-up it has cre
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 0xbbf96952ce0d3125b61b54699d88dddb0483c97c1e7ec014631c1921f08ad11e. 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/fc081322-a210-496a-b454-14874548ef1a.json and https://artists.proofprofile.net/proofs/artist/fc081322-a210-496a-b454-14874548ef1a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Graphite (English Version - Remastered 2024)
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 0x746684bb1874f5e6b8977184875e53811b5d4ec9e307e2598d6b43f37ea92e49. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/PLUM70900796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x540d7dba4ea76a0ef34d380f533fad4ccc5135e5bc7acb4ccbe841a85062b89c. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/PLUM70900797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac76b11fc6f46fb530400fca1767c9fa7a84e624be50f165f85776781fd56b1. 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/PLUM70900799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038d61798d2338f4fce92fc62381e40a29eac07e23da2f6d614b1edc88739fbe. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:38:26Z), 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/PLUM70900779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68ede202ce74ec1013da546d1824a39c4487d90c8d4305c2163b5c3ae05982a. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/PLUM70900805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x521a96376dfdd2c4aad416571c625bfbdbf2abbf8b986ab3b54d931078a04226. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/PLUM71100460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f738dc8048133dd0f8933d1e60b0645b7a860a9b6981a9855822c1577a5647. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:51:00Z), 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/PLUM71100462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869166321db1eec8227fa68f2bde469a67f7aef6f801c0493c156efeb57ed80b. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:10:41Z), 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/PLUM71100465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4764076df16340b98257e5ba9d566d8e44b0ff636977686cf8265336f09be8be. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:22:46Z), 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/PLUM71500556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193ecb8e92210ebd724291006ddbdf770e948e5ed87defecd63d9ebdf60d875c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/PLUM71500560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5474546b017c1fd4408dcb431799626b1013cb440764b7f2666948bbf08bdaf5. 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/PLUM71500561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408a47f1cbc11cc4d296926e811b6e6fa18b75f36d0b6376572c6b916a979481. 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/PLUM71500562.
Po To Właśnie (Norwid) - Remastered 2015
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db59e142ae9e853f0fb5dfc0d50972efda284b894477378297513e1324e307f. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/PLUM71500563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0676d38dc86a6f2405c58ed61f138393549be0b321bf8b1067de0d6812ead4f3. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/PLUM71500564.
Tak Się Rodzi Nienawiść - Remastered 2015
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86bf660ceaebb0d7a0377f28ae3db8433423526f50d61499953d2e88adbc1ae6. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/PLUM71500565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb789e19bf15d9deff0090a0e125b58f0e72e99c4c8d8ec923d003a5b2c002a07. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:04:03Z), 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/PLUM71500566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a78017865122ae88015d206bea0b94260369af114efba9130e11f4cc66515c. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/PLUM71500570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde431769eec416d95bc4226756f1170c9fa4d6d3a26390d732f0c6e29b66b5ff. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/PLUM71700710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x977434624f8147328b53ef16ec4749e28553ddbddc59834f2718edcfb463299e. 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/PLUM71700713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d15ba89c191b8726d2878f9b87b4a6fc329268fb51190ebdd79407c5b4e2c0. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/PLUM71700714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x955310c5f866909c148fbe2b101d09f753a14511789807e27c8660b143927032. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/PLUM71700715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63abb78f60ba7fa941b190f18b82359949c93fff375ac9b0c2d59778aac134c5. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/PLUM71700716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d40b8bf332d2609e53dc5f8d496a00cde14b5c3b70db41fff9155140d220e1. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:07:45Z), 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/PLUM71700720.