Skor is a chocolate toffee bar produced by The Hershey Company. It was first marketed in the United States in 1981 and in Canada starting in 1983. The Skor bar consists of a thin slab of butter tof
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 0x57c179465f8b71798bf72141e68113464c9585095264f570bd5f6cd17a68cb69. 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/a26ce10f-937e-41cb-9338-77efc423edef.json and https://artists.proofprofile.net/proofs/artist/a26ce10f-937e-41cb-9338-77efc423edef.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 0x82135c2859fd6d91cd8014d94e06e1f91200737a54bcaf5a6aa5e00ac9f92004. 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/PL89B2000120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5770908484f4086e917c9b2fc77ce28cbf7b7beb405e33f1ac8554d3fbddd88. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/PL89B2000121.
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 0x7287d70d462f2e35affbb4c3b5bfd646f25c18f6196b33f1c4b863adef1d660e. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/PL89B2000122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f67cf74b5c822568369b3b9c3efed3602802928381b7c52f0441d6f755a3fd4. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/PL89B2000126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca99751cfd11b0c6a924630afff73e988d49e07d413d261d59fac1832b47694. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/PL89B2000135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eea56ceffd209953606298c4bc3dd4862ba62c051e697dc9f18ea059ca580e9. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/PL89B2000136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b5fb9e40e462bdda9cea1838bcc6b0cc2e15787aea17a264b09bd5768c60ec6. 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/PL89B2000141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7748605451e8d1a511288cebe36973526095779ac5d758d1bf81f905741834. 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/PL89B2000143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af0c9dc10a6a259d4cd008424dd60b148f20ae1489e8aa619930698efd89f71. 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/PL89B2000145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4efcf23bad90a03d4e0b855780de7659bb619ced2140459f5f265988069cd76d. 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/PL89B2000146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f487f88f3bbad5c9a304b6268e3c4abc1b655a7317927c25c8154ddc30ebd7. 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/PL89B2000152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ebbb5287e4090b52dac23a65128713fafa49430fc5a95fb64cb191c834f071a. 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/PL89B2000155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b60378f853f24d6dcc1c45a097e8da59666de9699019cad4afe6de04364f95. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/PL89B2000142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d18d7146d6ffd444da5af49d12de0abec5f852fb3af5506af065e51b0b2a274. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/PL89B2000144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee75f6d1a87e458a649daa18aea5bd4f4871b2a70d2d894c3ccc9a826c684792. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/PL89B2000147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad35186ff9855654db69398d3033af7b5b6eb542433b576e16ccbbe9d5a09ada. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/PL89B2000148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb50d95112b079d4a9858bd0025a2395f7d1ac976ed5f81b56c63febc27f72b4. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/PL89B2000149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347a0f235a88910778698db7be86373765255d35f006eabc6b390ce826f31283. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/PL89B2000151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6878f05c7d4028cc5c2e988530a2ea0d38a52116b6e512495ddb1589b7a0d30f. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/PL89B2000153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf956e2cbf7b6768a3587b84ee3f9513819eb896de43fbbb1d7835fa88c59127c. 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/PL89B2000154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84165b47cd7ed661c7022d90d36bb1ea95ea4ae4efff3ddaff43365d70794ee. 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/PLC062511754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x001bd026f0dc9217b4c08a13af4eecc9517a74db26172551a4c4e85d7b8786e2. 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/PLC062511759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8b6c9fcbc469e77e0424c8d77b88dfd6cf0955cd9280de49a9369c5683c96b. 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/PLC062511760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3593316cfe86dab76714b78255f2afb5b859eff0062cd38051c1f8668f68441. 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/PLC062511765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbafbe209f283dda5945e917a01a8d62d7dee1353cdaabf423fe19f95d78190cb. 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/PLC062511766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf5f1fc679247c847a54489bbe4e1fa99f490d0f9920c8221b8b3a033d15f4f. 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/PLC062511773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0755ed4394bd7ba7f3d013e92abf4d6ec04801a6409a01378d6cf1cb3dc0f2e. 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/PLC062511770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdfaa108eb3f9a86f269e3c3baadba71bd6ff20bbe8deeb2510e88197f616163. 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/PLC062511769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5358de36e9ed101a6d1e98525f41f12695435d49e6eb60754c1f492452fafb. 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/PLC062511755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22db5b097810c2c5a17be6e37a1dffe636f5836ec15d2eb240639469a9d049bc. 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/PLC062511758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e146e393f2b79ec9be6fb396dfa592efd960cf5044f1eb8d62d5bd262872ed. 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/PLC062511761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb799b8188630be9e9471d214fc218a90f3b82f08d5421da40bb47178abe04a7d. 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/PLC062511764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a5d70ff92c38253c99da2780d92fbac3a398cb1666b240e4bd1f6dc3bf0bec. 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/PLC062511767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6be37ba0ed4f2470d839846babdf514358fe95d7331f1c82d093c64a376fdf. 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/PLC062511772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f1f9e03500807eaebf4c3af9f9610ff43ff6f593d8b6b006889695e0ba3cd5. 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/PLC062511771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba4e2bb6b2a94b245584b310a59156cf3fd9dd06698a1a8d4faa1da5e3f9c98. 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/PLC062511768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd045c16e970603ac1bc77133a80f426fb7c525503bef3972861566587ed306f3. 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/PLC062511756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e0c366d384573d2e31ff50c680e1cfc6dd1407e793d4fd85326d6ccebf42bb. 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/PLC062511757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8f29b308c8dad8515346dff154c7a1ba0ce21a9ac5ac749e161e09151c0dfe. 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/PLC062511762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5f0803bf6b7a65de4d6d32c6928aa9e24a0b68bdbdffe22fc237043e85ac92. 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/PLC062511763.