Artension is a North American neoclassical progressive metal band, founded in 1993 by keyboardist Vitalij Kuprij. The band split up after recording seven albums from 1996 to 2004, but reformed in 201
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 0xa429190c38552c547128c569f5d355a55aaa58f0bbd5afb69b9983d5364cd1d1. Chain 2 (Bitcoin): anchored in block 953886 (2026-06-16T04:37:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0c11f046-5dc0-4c1d-a879-a524370c520f.json and https://artists.proofprofile.net/proofs/artist/0c11f046-5dc0-4c1d-a879-a524370c520f.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 0xef84aa7f443fae1d3773a797dd6060250a255a1c54b6c6d4e8eddf2b841019fc. 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/USHM90639132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb1de111177057f1299e831f3cb3b01d7cb0bcf06c497e4a2e68f098db997424. 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/USHM90639133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c34fc4b9e0539aee7f75376ffc922334290de32dc94e78162db00e0c8a4e817. 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/USHM90639134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4ca70ab18f4658d0a9ae3e372cac468deb338a0a5eec89456830ed214c66b90. 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/QM7281520973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0eca61c119b319f92ac320e1343e568b79ce8a340bd4a6ff0f0751ef456c4e4. 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/QM7281520974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a1f46eaf393adf1207a1e409a0f0500e9be06774283f432c2cda3582341b8fb. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM7281524240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c266e020a67ea9d784a8924aab7719e77f5b8197ccfe427ae323367344f0ca. 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/QM7281524241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c4d6197f32cd46b8b8c8e50cacc61d78301c2354e29bcaccf3860dfa56b725. 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/QM7281524242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8413b81a7c2b41004eec40c577dbbdf528abfd7293d01c3b478d130f9ecbe009. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM7281524243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa92f3e0664403781406d6fc60792ee9cc25b10c2da99e27184b35a7590bf5d6. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QM7281524244.
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 0xb8335e5dc126ba203a4c050cef5ba614941cab81a29aaa41789d05cabd57cd5d. 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/QM7281522124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8cf47cbf1afb93fd24d54ffe59f8cd9e99210e81f958353294ec266ad7bbf0b. 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/QM7281522125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x218edbe1595926676fd00a5eeadad4f6b1779cdd96aafc261d0909d76050d87e. 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/QM7281522127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x503a3bc1580c76817ad71c06688663e49d814647bfbf1201dec432fb711a7a50. 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/QM7281522128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1808a122aaa58ef40b71aef6d2056df7ac3ca58e21bbf5680fe8332ff590050b. 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/QM7281522129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb80db0c0bf74e2ec48cac65998744e4ac9dc1cd4dd6c12d786852fd3590530ac. 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/QM7281522132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d82018ca2ed64251bc7c6c032d9c7a5ea5832c8dd19a2540f5cb195e442baa. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QM7281522126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b0afeb77d080484656f43d7dc942dc2b2881bf48590943873e09a4f87f9507. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QM7281522130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53bb77107f4e9999096104d70e134856f126410abaec3c6858fc334323d9e853. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QM7281522131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5bd8656635b1b4189ad12317bb9e73f584d4ecdf51d0a0664d1dc31a82f22ff. 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/QM7281522093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546314ae2f44dc05e3554c1274f7c4ebe97588337b6f12e538406939e539f70c. 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/QM7281522094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe7209f5888b61bc795359c0b655ba45d0a6d66219c863b0077ab5d3fcbf4ba. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM7281522095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab9458a3270e74fdccbf537b0c81104fb050587339fb7f1b2a36fe793ddb698b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM7281522096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce454acfb7b844d74e2bb7cbf7112b4654cfc8f82a663390510868a3d03fdbc. 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/QM7281522097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1654d9f776ddd8f43b341be1cc23ed6d1537933bcfa4f39b1affbc3bd3e8763. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM7281522098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8183cd5bd935a537365cbe3e7154b9ea4882df48c1d29a63fed45f4f0a33387. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM7281522101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0856fb40c2b35f39943251163c0944252d7161fa10f673fef20166ebe85fb9b2. 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/QM7281522099.