thumb|right|The band's stylised logo. Joker Out is a Slovenian indie rock band formed in Ljubljana in 2016. They represented Slovenia in the Eurovision Song Contest 2023 with the song "Carpe Diem", p
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 0xa060d8974360391920523bd835982e2c39f26a698f84fbeaa2e927e631424404. 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/8b310ece-40a0-4512-883b-4e3774bbb637.json and https://artists.proofprofile.net/proofs/artist/8b310ece-40a0-4512-883b-4e3774bbb637.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 0x5636d64b4799d02725fe1a2ddb3b1217866a6e7cbe0b0ab16c50a4a61d624009. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/NL1AP2098756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06691a1af7ee70e1354147443d38f252bd6f6bda7e3346e9544bc2f6b816c9d7. 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/NL4NL2149990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b2b0e21f304bd11ecc732519e41bd249e3438998d55b3883005944210ef169. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/NL1AP2021515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2339fd1c6f8409a20a42cb6ab1fce832a288542243b1d80cfa89fbc00925e206. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:24:26Z), 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/NL1AP1962238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb2182aaaa0e3885ed729cb1425f6d4d5371da313cb288b9be39362912e32670. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/SIABJ2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9fafbe6c80cc0cce5682a3158127dace95a24a8d79f90a47902482a3465c9ed. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/RSA3W2200256.
Sunny Side of London (Live in Arena Stožice)
Sunny Side of London - Live in Arena Stožice
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf23f9761b0170fe8dc18967243123416ee6fc0cf95363786e17687e329b71e. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/SIABJ2300009.
Sunny Side of London - Live from Arena Stožice
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc64d1932566d53acb5b7133adac688b8d57deb2f572d7537f94b3101610b0b. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/SIABJ2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd24e8b160ae74cbec482835fec8a8cc25d4d2f444b27b0e3d81bb365417a2548. 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/SIABJ2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52297fcbb12a2294367734175d29e4239bd5baa5c571c6994e13eac868c4f917. Chain 2 (Bitcoin): anchored in block 957699 (2026-07-12T11:51:06Z), 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/SIABJ2300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2009a1cc59031ccfcfc42ee2d9a4fedc93e6957fcbca14cfafaa624ebfc1f06f. Chain 2 (Bitcoin): anchored in block 957695 (2026-07-12T11:16:12Z), 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/SIABJ2300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bff48e6ab27eb3352f1c13db3522b9d693a9c7c7f531004dd0205db4f6440ce. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/SIABJ2300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606d8500b983b6eddcf4a366d0254965069ca60ec8a3e424f4fe552e82b1d542. Chain 2 (Bitcoin): anchored in block 957697 (2026-07-12T11:22:18Z), 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/SIABJ2300019.
Omamljeno Telo - Live from Arena Stožice
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54596e0778332b1c1e12901cdc1673fc5770cb19dbd2705c8ea3dddcf51da6a3. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/SIABJ2300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2713160b9ff38a93e4cf2c666d216a928bb7db8a616a3877bed1166d3364c731. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/SIABJ2300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34a789e47521d30aa8fdcf1e917dcbc09ecaf844cf6b556fe08a9b2c22a7db9. Chain 2 (Bitcoin): anchored in block 957699 (2026-07-12T11:51:06Z), 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/SIABJ2300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e24dba45218faea697f830f81693b7166d44ed46a847e34e0f48b3cae3984d. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/SIABJ2300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6cb9f91d04671c299b2594f91e2adfaa60015a2545f5ec28510cfc0c6f85ab5. Chain 2 (Bitcoin): anchored in block 957697 (2026-07-12T11:22:18Z), 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/SIABJ2300028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a7ac3e613c33c0f4e8b23a82740f2766b7236b5148a92afdd36bb853d8d3bfd. Chain 2 (Bitcoin): anchored in block 957695 (2026-07-12T11:16:12Z), 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/SIABJ2300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0379cffb37a2ff93f6b74ccaecbd2a25e26d86111210d8b5531cabcf8d6273. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/SIABJ2300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f54a52e08814d43590db73ce90f50dbae8d83537da384e35a47956124446d4d. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/SIABJ2300032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8252a7c7a14585e4661313538ec802d6789beb0d5529b35f9fb1667651cea331. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/SIABJ2300033.