Brik ( ; ) or burek is the North African version of borek, a stuffed malsouka pastryAlan Davidson, ed., The Oxford Companion to Food, s.v. börek, p. 96 which is commonly deep fried. The best-known ver
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 0x9d278b484b0b950c65a86591211d26fb4050f2776d8f9aa4d19fcda2cdc74159. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/252f9b7c-307d-4050-ba0d-5d2f0bdb2bf5.json and https://artists.proofprofile.net/proofs/artist/252f9b7c-307d-4050-ba0d-5d2f0bdb2bf5.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 0x79e6313d3934edc091b85d8ad4199202e4918f10ec0b6134063618e14eb8851e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GX5MX2314011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f98a7966b31d50a11fd3b2b42fb44d2edb1a2c34f2f7e300f2b206f5c0ae8e3. 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/GX5MX2339709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8791cc31da1f3a183a65d505875d3fdd6cbbef34048e56684ee8d5fd1c1defc1. 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/GX5MX2350496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52f77e18528fb7e067e6b3e9cd3670b1fb6f5e7c88a289f98ee780953c4ceca. 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/GX5MX2337246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x713288218595d738ab8dd44f1595c4cb462a59b04fc41142f33c8cd75a2e5947. 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/GX5MX2359547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b39c87de9bb7f6e6b6284d7cd11dcd6a6b30a746c2121c72d134d5beef6eef3. 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/GX5MX2326414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d2c5f66749eae5b11f43c322bd85d44a5ecfaaf7473c554fba4c94facecb877. 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/GX5MX2330880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47753cc51273213f334e843339307edaaf9e25d218b5186838e03e2f52ce7f18. 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/GX5MY2395143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44bd9463eb750165f1f23f547ca67b7fa507a319d83705bc2a767d5e0dddd683. 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/GX5MY2370904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5abeb970e5639329b41708cc924661ca59f06ff8adac4190050ea2dbb514802c. 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/GX5MY2340583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46d735cc27121c1979bf669e377ec18a341f28a3339e01b49d2cf708c1626d4. 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/GX5MY2316418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e82ff87100cc102ea1e7b585acffd004c150be46cae13c731914add65195d6f. 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/GX5MY2306822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8983b2b9be4927725a7427c19fc4897cdf4eb7f5b7e6fea83387363cb1443e0. 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/GX5MY2302767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9152beecf621e7ca0eb37647f776d02124c40a2902f8c6a08169d1c22d1ca0df. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/GX5MY2308687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9943f4fa381e78832f32f1bc1052f89cb1aab907b9ce0fc4e29443dca6c67c08. 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/GX5MY2324440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67605739287d4074688186dc95f2acfdcc4ffd4068adc4faf0fffaf17427d90. 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/GXBDS2307786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5616abd033a2f243fdbde80fab6dcb26a7949360ae33e37a0a852b26167685b5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-22T01:23:43Z), 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/GXBDS2354279.