thumb|Väsen (without Ferrari) in Sebastopol (2008) Väsen is a Swedish folk music band from Uppsala, founded in 1989, consisting of Olov Johansson (nyckelharpa) and Mikael Marin (viola). Previous membe
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 0x582cf4ff48cc68eeae1a4f50f0eec5032c544326eb7763b082318d6c2b552143. 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/3ccb6ee0-a88d-42da-8044-94fa42350f17.json and https://artists.proofprofile.net/proofs/artist/3ccb6ee0-a88d-42da-8044-94fa42350f17.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 0x8f3b2e12deff9f755eb289c8e2d42cf5047360b80a8ce7a2bb49a99b7bc7ce7a. 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/US62Y1369702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x624e29f35af2c05d5fdaf8a8ab8a088f12fe1882b87459a51c9205ccaa18bfda. 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/SEYPV2300109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b93186aa217adc24b05757d154ffbe546b98cf3f778717792df1fe4c2e0e314. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QMDA71448155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7088476d4e858a416a5dceed1105eb1c901fc1c016ba2c6ff5d3c9c3d3cdb42. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/QMDA71448156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57bf702d3e45cd8d5c7c1ddfdd27754d7d0768ac92b2914aa596227d1a7288eb. 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/QMDA71448157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29825dd7b138a9d7afc05e6e79404cf03ac3edae44603e2e03896ecbf56c9fba. 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/QMDA71448158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac6040f5d24464e3336bd0aae1ad5b1df24898607bc6a53f3ae9130d74559953. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QMDA71448159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08732d1fb54ddd19c55766f6f2ea7bf7fa53330734fccb3898217f59e3ddddc5. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QMDA71448160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd0c302cf97aedbf5284891fe72fff6d82c536d670a5141a1f7a7ebcd600323. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QMDA71448161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f9f7e439af429930340400ff202f03d1dfd655aa0c8a3ec0444bb57bdb6d93. 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/QMDA71448162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4020c89de1e19471402aa10256138efd98aec45fe16fe722389f65227db2e8c2. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QMDA71448163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac802b354c3bcde6424462fe14af5c04c79a190a1a6e1c6059dd93130803a57e. 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/QMDA71448164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda95af0648e7714ff3a80660730ddb2c99aa5166510caf70a7a62014a1f0854b. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/SEAGA9214130.
Polska efter Mats Berglund / Såld och solde - Live at Nordic Roots Festival, Minneapolis, MN, 04/23/2000
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x783dfde43b24aa47ffabcbab35a570c703e7fbe49db480316fcaf675aa41b77e. 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/US62Y0166504.