Sello (Finnish for cello) is a shopping mall in the Leppävaara, Espoo, Finland. The mall contains more than 170 shops and services including a concert hall and a library. The largest stores in the sho
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 0x8a1e28654c60df70ca2ec22db23d27a69d056212d642572dc4e2184153df165b. 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/92a87ba4-bcef-484f-845a-41980a80d891.json and https://artists.proofprofile.net/proofs/artist/92a87ba4-bcef-484f-845a-41980a80d891.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 0x88836c3902ee66dae6a0c236bdc03276f3026d34275179e0974cd8108917e618. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBLFP2041180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2a499503296b5c5e758a9d5d7a71864a1aa007ede2b09a8a82bab90d026058. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/GBAHS2200794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc4808563a04e7ea1ff6321c1bf01bbf456013fc538b0d56c418964d8a5d435. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/QZ93L2203603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccea63fa3c26bed38e244c54f9e03f41bfc8cb0d6dc313fee26867334683ede1. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/GBAHS2200795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08572765c4312d0c9611ca32394c4954edbeb97f1c32f1720ec56edc86f14377. 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/USDA12303373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b09b1edb6bdefd670db693b68a91554c2b973d7810b0c99d1cd87e069684703. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBAHS2500193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab603afd18de36686fb008c7eb6dd5c4e3a65980259123c612b4ad9b47722d1a. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/GBAHS2500194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab603afd18de36686fb008c7eb6dd5c4e3a65980259123c612b4ad9b47722d1a. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/GBAHS2500194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a690b607bfb18916bdf1b78461f2689ee1510053ff5e53239790b602e4abaf. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBAHS2500323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c87425e8f60e38e8a219e4bb330954dd0adc0bf651bfd43277c35f53052a5e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBAHS2500324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8c47275ee9efe2db2181fbbc7820b2ab3875884b675843bae3e09c069a92d4. 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/GBAHS2500325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc91af60100b5ad0723e100355b8e6ba686c3490084c8f301325d023661530c3. 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/GBAHS2500326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b09b1edb6bdefd670db693b68a91554c2b973d7810b0c99d1cd87e069684703. 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/GBAHS2500193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51537265d455e01dd2967e43ef75c7a98d1a923bb6d389134b86c5193693c35e. 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/GBAHS2500285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af351b4ded05f3e0f7e80e3c21de67d183ea3318a3b1fd36cfad574e8595c7a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBAHS2500328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe1fc113d9c4ac8b24f595950aeee3f9260359284dedd701edb32a601ecef3d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBAHS2500329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc35649de9777e6bce210289ae835b754d20a57f68270e39da45121519a209a1. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/GBAHS2500330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4895f1b30ed0850d0aaa547063867960ad084b7c34baba9f410aa7001bf38232. 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/GBAHS2500331.