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 0x158c9ccbb39237ad7b1bb49d4f99cd3746ad95da670af07260d6d09b1eefef4c. 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/e6c6574a-8d24-4e0c-97e0-6958021a26e5.json and https://artists.proofprofile.net/proofs/artist/e6c6574a-8d24-4e0c-97e0-6958021a26e5.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 0xeae51744b6ef8caf81e0e22e8dfc7ea675e3bfd60fa335adf9193e7849b4cb4a. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/CZD712000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270d820771d4577e0c853a2d0cf6e4caf1e5c35f6cc8009caea9266d083e0def. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/CZAH91800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d4e3b711e4bb7d6f6ce6aa4b3baa03454e2fbb87873b21504e346d0579be64. 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/CZAH91800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f509b406a87fece9eb979e7ed96ed103a6a5956df3b2017c8a2c2b620ca48d0. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/CZAH91800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x948933bd2a388435964ec6ab31c053c0ac3fd62178f2ff10585a2c8820f07d08. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:23:31Z), 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/CZAH91800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0170edb94ca323dbf6c22344d73f3d62d123b175b22bd9e46c6af53935eff6. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:09:07Z), 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/CZAH91800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cbef311a911dc6ca3df697c1a88b76100b4ce4da9a11740e84d90b3c0f2de6a. 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/CZAH91800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d4e3b711e4bb7d6f6ce6aa4b3baa03454e2fbb87873b21504e346d0579be64. 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/CZAH91800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28a2890d52b6c9c3de1a11b0990aa27812b0a2ac20d79d407eed586a7959fed. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/CZAH91800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b5d7e0799a6c00e588b0d116fba465432a091f3544736a9042358ffd0d7719. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/CZAH91800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84b9a9f070f9643610aa389d72bd36724eeeef7da77e05cbe136e5a41fad994. 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/CZA163370240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23546d929ffbaf309390998eca86635017a73a1ec9ff3fcc93c23f63ec0e0cb9. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/CZA232000849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a4e2ede3ad776f022fab4f044a71eda812a813f2d88a97cd9def70640ebef2. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/CZAH92300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa03959c604357acb67f88cf096e6c6a2ac37fb861560cf14e0322dad7fef9cb6. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T19:24:21Z), 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/CZAH92300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934cc22eeaab83c6dcfa1fbdc1bcacbea44da6cb887ff45986039162a99d2c0f. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/CZAH92300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a4e2ede3ad776f022fab4f044a71eda812a813f2d88a97cd9def70640ebef2. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:19:29Z), 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/CZAH92300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa03959c604357acb67f88cf096e6c6a2ac37fb861560cf14e0322dad7fef9cb6. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/CZAH92300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67449967e3d73c3a218844678d624824f665b9b224bcbcebd6353221b1cb5f1. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:07:11Z), 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/CZAH92300005.
Ej sestro (My sister's crown CZ) [Bonus track]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d52d31343feea8a4a4437f4b4d3ae483d3575f708de811de8083b2d6ae820e7. 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/QZZ662417532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f9d27e388930b1065f029bb28ffe28e2284da8cf49eb8c5e0b550dd3568f54. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/CZAH92300001.
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
My Sister's Crown - Eurovision 2023 - Czech Republic / Karaoke
Eurovision Song Contest Liverpool 2023 (Karaoke Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d71eb0cf69d9c6eef429662ed869d82195ccec27c83337e626856f546a4792. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DK2DY2300060.