alt=Beredskapsmuseet's sign of En Svensk Tiger.|thumb|249x249px|The famous propaganda poster warned Swedes to be wary of speaking. En svensk tiger () was a slogan and an image that became part of a pr
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 0xa92633eeadb21d0d97fe48e1f74760bd4f2b33418137ce3c717745678822675a. 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/16ec10d3-40f1-43c0-90ae-6d64201e5216.json and https://artists.proofprofile.net/proofs/artist/16ec10d3-40f1-43c0-90ae-6d64201e5216.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 0x86a68c1abfc5359f94ac17301691d5e330e61e85bc22bda7ac7aaf1ef5b9ef40. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/SEYOK1009291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a68c1abfc5359f94ac17301691d5e330e61e85bc22bda7ac7aaf1ef5b9ef40. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/SEYOK1009291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63e3b1e940df4cdae415ad9ddd55ea83a5bbda73e5c4160ba562a39509fc39e. 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/SEYEX0800401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7dcb09653166add48b544b157329f83148bac3d205580142c00fb0ace41588. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/SEYEX0800402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56eb3febe6756d5452c83291f6bb48f58216a5a8d436a216836dec8a12c2e7d6. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T04:08:24Z), 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/SEYEX0800403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf697d1421792741cca5bfa045105660c87e64ad3ce8ecfe0bd64041c337f42bc. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:06:24Z), 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/SEYEX0800404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99456f7159bb94651fca21762853874ff6e06c5d5e3a73ca32bfd49a030c63d1. 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/SEYEX0800407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63e3b1e940df4cdae415ad9ddd55ea83a5bbda73e5c4160ba562a39509fc39e. 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/SEYEX0800401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7dcb09653166add48b544b157329f83148bac3d205580142c00fb0ace41588. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/SEYEX0800402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56eb3febe6756d5452c83291f6bb48f58216a5a8d436a216836dec8a12c2e7d6. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:31:22Z), 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/SEYEX0800403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf697d1421792741cca5bfa045105660c87e64ad3ce8ecfe0bd64041c337f42bc. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/SEYEX0800404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99456f7159bb94651fca21762853874ff6e06c5d5e3a73ca32bfd49a030c63d1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/SEYEX0800407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a1505b1f340ab7b9a8cf5a1691f2bdc33430ad2c9a0bb6568d11959524a997. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/SEXPO1100201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a1505b1f340ab7b9a8cf5a1691f2bdc33430ad2c9a0bb6568d11959524a997. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/SEXPO1100201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290121794972193b085f93bc7ba4165d075fbcfad9f03b5351587f7c263c0fcd. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/SEYOK1210014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65cf30dfc2c5ade84a30437cfaf38cb021b95e30fec2f7c22714eef3985c2891. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/SE4OA1800101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e008f1a612e034b3b27216cb702c53e207ec27f8e34a3f087014640a30a406. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/SE4OA2000101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e008f1a612e034b3b27216cb702c53e207ec27f8e34a3f087014640a30a406. 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/SE4OA2000101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef24cbd813f327fb507858469f62ae9bf284d75e1474ea7a207babba3e075fa. 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/SE4OA2000201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195ded0deb2ef17082f26bfe539c33b6fc1920d1a6d2a3be37170c261b4c66ea. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/SE4OA1000101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4274b15680e1febc98db8b0df006cb6fab70527026aed41a2143f31d7bb436f. 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/SE4OA1000102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195ded0deb2ef17082f26bfe539c33b6fc1920d1a6d2a3be37170c261b4c66ea. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:52:29Z), 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/SE4OA1000101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe54def8e6edaec4c4e3553f530ae084c4494b45b1d3c0777a1d2d92158ede1a9. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/SE4OA2300101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe54def8e6edaec4c4e3553f530ae084c4494b45b1d3c0777a1d2d92158ede1a9. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/SE4OA2300101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6c8f1b90fb56615610b29e63cb2766969af5744d3d6b5640f2ba8db7508dab. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/SE4OA2400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6c8f1b90fb56615610b29e63cb2766969af5744d3d6b5640f2ba8db7508dab. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/SE4OA2400101.
Kustens glada kavaljerer - En Svensk Tiger tolkar Lasse Dahlquist
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57822a2a6c2432afe9185776808c4cf81942ce9ce662992b0db6a99fe66c6954. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/SE6OJ2301105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14464bb8470757ed6ddf64faaae9484d3f42aa7aac34109a9cad902e75757be8. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/SE4OA2400202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57822a2a6c2432afe9185776808c4cf81942ce9ce662992b0db6a99fe66c6954. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/SE6OJ2301105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14464bb8470757ed6ddf64faaae9484d3f42aa7aac34109a9cad902e75757be8. 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/SE4OA2400202.