thumb|270px|Olvi Foundation Brewery Museum in Iisalmi Olvi plc (, ) is a Finnish brewery and soft drinks company founded in 1878 by the brewer Williams Gideon Åberg and his wife Onni. It currently hol
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 0xe5a2c59ed8cfa56437e188a35e471991dbe893a8fb91ba32ccb7f23f0cbc03ec. 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/ff06d7a5-f626-4413-b461-ec1b2d08be54.json and https://artists.proofprofile.net/proofs/artist/ff06d7a5-f626-4413-b461-ec1b2d08be54.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 0xe4083fbfd4b94c99fb4ea5acc0da9f490a7dec783fa4161af07d856fc9ed69af. 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/CH7812052771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77d7d5180e86a245f4edeffb6c83d63deb07bde1567a6078ec2905998356a50. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DGA082239546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1731d52a5da66499e451ac01f6bb8312d7f936da91247c996642f2da14dced. 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/TRAHZ2300195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa14bb5661b29d26aa8730812f5891125874c16547d4da254756d51044588ec. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TRAHZ2400232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167e4e83dc8c85a8e5e1b8bd6491b6f042751db251cf8584252d84583f188435. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMFME2197700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e240b066715669aea2ac0d86d3bf6794cf81bef19ef660c41a77bca125be1e. 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/QMFME2197701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f2ed67d8ddf9e7fa197f4a0a24520f0d22627713a8dcdc4f2e48645afb1a65. 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/QMFME2197702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6a56c012e02b27cb04a72d08bbd6761e8cb1a4e260f950b91140652fc535d7. 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/QMFME2197704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195e21eb0c133daf7445b8275523d4a45d8818c5cac8f4c74226e82d07d666ff. 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/TRAHZ2300144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ec38fdb3b2554c799b0ceb4e9a481b10829a4bfe2a969af8b9e810bcc748d4. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TRAHZ2300145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07340613ad51a73b60015dd77625d7c110d1a16f1aca800a6e23f7faa40fef62. 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/FR2X42303583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d0647dde63efdb7215194ba9902851b4124951f0ae3410b0e8c60c5e502506. 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/DGA082299204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa4845399650f126a2e20f8fbd779fcffaec85183e537d9980d7afcd85c1763. 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/DGA072200127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb1260a41c29aba249fc0c08c9e2eb138f8c274467e19344459c69a8b91e7ac4. 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/DGA052262613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf2c6a9692712d693cf90609f7c1f2928d5782ded602b7f1e4714e82a37bd0e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE59D2253501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc728fefbdd75dcd89e769f8c8516a099218ee3a52157d05908c4e1b5dfd1928. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QM6N22224768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d69ccf4b132b93aec69ccf05c3c21b8a32c2176374c8e10f4bf0cffa12dccb4. 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/QM6N22224783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba53720e573fb407f69f17043aaab389ec295936362d881d44a2be6ed4ef0b82. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM4TX2208838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35bd5063ab2f486d3f2fe4b36d8a5b5ec786faba930465aed0a4fc10513b8fe1. 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/QM4TW2225770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee17c1647d56f531dc2416fffb459c2c265c9d1162d4611951cf1edba7c67fc. 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/QMDA72196420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1694fba8b1b16fd695ec13a72f390ebd255fd5685290af917e2834c74fc05096. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRX872152125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47afb4f59e6952d65544f4035b3d2cfbdb9f94d64519187fd65913b07e0a7263. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMDA72158769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4039e2e5e5984633d9eb52952f49a45646b27298edde3ada999d20561732032c. 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/CH7812178565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0945a66fb37dbbbfdd92cb88dfae90de6e516d1f2ac39eaa270b26059bb5f2e2. 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/CH7812074387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05256cb9f0088220a51d6bd7baa0dd8528d98ff3e0b4c9e128fa458f0a81880. 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/CH7812062746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52bb9ee801b925abf089d926d6d72f4dbce6ac3c8becd6aa008a4d93e3844e56. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:54:44Z), 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/CH7812046067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59cc987456477129dcfaf2ec096087d86e28a04cefe333b4812f53672dabb2a2. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:04:30Z), 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/TCAEL1982728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8600ca649990a566c53b364035f5acebd18068496e66b03798ab741269a73732. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/CH7812047081.