thumb|right|Doktor Kosmos at Emmabodafestivalen in 2001 Doktor Kosmos is a Swedish pop band best characterized by the unique style of their humorous lyrics. The lyrics often have social or political t
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 0x89c9041f259f6a1858a9293c3b9ce9a9c0a96bc36b10aab5220e4241b96beeac. 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/042d8dab-e357-432a-a197-e1d635e2861f.json and https://artists.proofprofile.net/proofs/artist/042d8dab-e357-432a-a197-e1d635e2861f.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 0x45d085d58fe594d4f843e504a7a83de66cf42bde6d42632b3664cfe12866965b. 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/SEMBA9600304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8281b5d628bb166f4f8169f7b672e54a29b6fe8cbf8c6bfd92f8b3260b1c360b. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/SEMBA9901010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14e7e8309ea23570cf1cf906b93393e47490eede05371c22b8227267145863f. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/SEMBA9901030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f0e8609dd305538995e7d0ffbab5b7007c9f660da7be608d3bf9af6ae0d3fe4. 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/SEMBA9901040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b13e900bb2e1d4cc1cb21bb138720f8a389e693482d37fca5c75c0405a59875. Chain 2 (Bitcoin): anchored in block 957608 (2026-07-11T21:00:50Z), 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/SEMBA9901050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e55e2cd773a528a01cbdb785a5d4ddd090b26b58ed55299d211d3f1b7c1ac5d. 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/SEMBA9901070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3199a7611417ff1d61c5e3ce6f15d147245eb5081ce659abe6f8321a0bc99e4. 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/SEMBA9901080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a64856ffa36dfa4b391a4db78339be4e37780bbb6b05467b45e005756dd32e1. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:48:07Z), 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/SEMBA9901130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x732be9ac89d8bbb22c39036db1b4415f51d53e17f563b2b36c3ceaca8b69b2ee. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/SEMBA0104020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef9849e79bd155a0a8e5b47ca06efadb1fdd296c8594d3719e86b410beee62c. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/SEMBA0104040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1c11de4719b482d1fb1b8e4e0fa5b1178fc23c43c5448cfb65a071b402e87c. 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/SEMBA0104060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14149dc99f5c4e7e5f875beb3ba998c1311506bb659b6e2d0d7b458158ee0b7a. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/SEMBA0104080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f471d917762193a0928ef542ae446464cc06d82a906b45910eae20962b2805. 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/SEMBA0500103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2040579b667edc2d8406a4595c357428b5c02a4206c59afb0989484c1acb8673. 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/SEMBA0500110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab454fef187dca83d9d052e1793d5b5d24b1806c321349a8ef63f23b866dd25. 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/SEMBA0500113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x484e8a5a58e16ca6e393aaebb7571be78da6f3894ebceb33415b5f453896ad78. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/SEMBA0500120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad9098370f5626422a84e4f8cf7153361c0898aa8f1a144334a563618249ebf. 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/SE49V1800112.