Sokos is a chain of department stores in Finland that is part of the S Group, which also operates the hotel chain, Sokos Hotels. Department stores Helsinki (centre) Helsinki (Kaari) Hämeenlinna
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x992aabaeda16878845cbaab292242b8c67be4a96559de61d547c97aec8c7c47b. 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/5a36d161-9089-4cdb-89ba-c4ea972c018c.json and https://artists.proofprofile.net/proofs/artist/5a36d161-9089-4cdb-89ba-c4ea972c018c.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd98edb7cc032f008cf20190c8be631730680d2556b094b697ab438a4a26ea232. 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/PL70D1900107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547ec20a10ee74c44a0196a4add7b53bdfe680b0481d799db177856f1483d8c1. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/PL70D1900108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81d8187e5d661e1550f738dfa8d9e720be37cce54d39f079cebfdc2a321bb6f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PL70D1900110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e6ace8d799c3b30dee55689ae70f4f1094932c199ff8b336a2119e018eebcd2. 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/PL70D1900111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d0089fc8e3ac261541caf6696fd6f4e0bd3cf4dfd90fa936bb647f8d5a2ca76. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/PL70D1900113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a80642e67ebf14f71fd7a02ab279e368459cb062b3a6e6544e6c202f649b362. 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/PL70D1900114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e22b2dd2b33a9d24c0b72030ea5e07ba9abaebe2c940b7f109b8466c3fb6a72. 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/PLF241705582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ea542d5476da75018abd345353a5f2789372eb556e98a5a56950c9c93a60b9. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/PLF241705501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518d90cc4b2ea1e7eb0885b0764979081b3a410539466704334bd7b94e314e29. 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/QZNWQ2446782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72880bf01edbbe498dc290ed2cb639e9b7ca670920e56b4224c8fd1db189f379. 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/QZPLR2357695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad488567c6c3dfe540b8dd1f0916cda1939c5f4dd1697e3d15f7d5d17e940dd6. 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/PLV402301611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7af7a900e87b0b0d64478084d570cf277e0622d84c0e1eb05d52204fba34a6. 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/QZMHM2240631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c451f351bb58c9f7b6e0a2d6804fe301960fa755cf8b507fc6c50ef45d1dd0. 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/QZMHL2269943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c451f351bb58c9f7b6e0a2d6804fe301960fa755cf8b507fc6c50ef45d1dd0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZMHL2269943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc283454790b75da15194494d64729a893f3e83207c0f6d9938f973aa14bc456f. 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/QZHN82112745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4ab5dc1dbea9d3fbff31b9294bba560a56099db21981a57e605dd19ebaa39d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZES82149503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b3978c1c939d35fa67478e7913b8142faab78ef0e3792c606e2b165ab1b60a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZES72186825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e277c08bb843c1c53be244b17e6e4258b25d2fb3929a8c44c6c6eca90853576. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/PL06N2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b08665b27327910add32754a9a648cb704c7bf1af9ce700e7b7d38b61cdaca. 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/PLUM72000553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd98edb7cc032f008cf20190c8be631730680d2556b094b697ab438a4a26ea232. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/PL70D1900107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b2aa1cab1d41e746c16b23b80b61f771e0f15d97a0b5a6d7d7d4a7c4a18f60. 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/PLS711900612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b030e528095dca68b3a3ce22da29c3c7134cc0b6898e2acd6ffad730c0c4e9. 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/USCGJ1957195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7e79987132b08783a9f992a3228e63443206af4f14cc496b7d5b5de8fa45e1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PLS711900607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325b1689a49f2c4b2dbdc2d499f59df5d1e8b0c4bb33ecd5bf4f163cbc899cc4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZES91845331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e22b2dd2b33a9d24c0b72030ea5e07ba9abaebe2c940b7f109b8466c3fb6a72. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PLF241705582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c719f8f8fdf393862c4729fe83fc12757390e0ff6bc9e998e0d4a85b8f271e1. Chain 2 (Bitcoin): anchored in block 958042 (2026-07-14T18:24:07Z), 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/PLF241705416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ddce3f6b3119b6d80245c266761a42da983cbf1eec1a22983a972a64c29853c. 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/QZDA71872608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9552a83f5e147e2ef75094d1151c0ffa994ff5a5f8e8cdd98b395c3b29f25a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZDA71838210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0519ef4ef3d073f5093df7eee74fb2de83ec8a5424149d64629c010ee5b3c5a9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZDA71838406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddefa0831ee4aca4a91dc12840da10535f7b2ecc945960fdfc817f0328c1135b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZDA71838523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b2aa1cab1d41e746c16b23b80b61f771e0f15d97a0b5a6d7d7d4a7c4a18f60. 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/PLS711900612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b08665b27327910add32754a9a648cb704c7bf1af9ce700e7b7d38b61cdaca. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PLUM72000553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3afe04a5241f95bfc0e3020a223fbba49eff2a0630b316de2b0cbf9025c8a557. 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/PLV402301650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e347fe43d5c7bdf7beee366de76065ecef55c990622be955a2edcdcb1c5a9c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/PLX632100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd368363815a4603fc5b475b42e2ed92dabf69b84e849d2dc31ffc6f96524ad82. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/PLX971800019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c428c75b4cbbf8db9f34f8e1dbed3dc72e14309be1254e26211fafbaa9c4955. 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/QZANL1754435.