Sieneke Clasina Gerdina Peeters (born 1 April 1992) is a Dutch singer. She performed the Dutch entry at the Eurovision Song Contest 2010 semi-final. Sieneke released an album with six covers of songs
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 0x78cd25dc15ecebbf94b175367e64cfc616d24b7a1994d40ca03934ab79d55d88. 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/aa712b38-bd89-494d-a25f-04063316bbbc.json and https://artists.proofprofile.net/proofs/artist/aa712b38-bd89-494d-a25f-04063316bbbc.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 0xf8ecf164472f8a8ad0c43aa240ad4b65fea1cd9b6941678fdff2cf8d5c1fc740. Chain 2 (Bitcoin): anchored in block 957833 (2026-07-13T09:36:32Z), 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/NLQ271000065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998b2283b22f4c59b7ae4a2ca8b5f2d8f9322c44c6e2ee813d61627ea3e680bd. 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/NLQ271000073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60aa04920f7ef09d96d372d9994ce89e277c5d6cc773193514baea29a4e4b5ab. 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/NLQ271000076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd01df4445187438034b4021d57e90d6a2ca36d0a85715e0de731ade1159ff16. 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/NLQ271000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f32c51920ff7495e707bc6964ff695c5c973a519517a7cbe767a22c291ab6d. 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/NLQ271000071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde572ed0924cfad515b08ff21824f77e4c2d21dd7b98cda1624611f5d8ef61c5. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/NLQ271200114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac6c9d7062e696ddb4714d08356d62444e1e06ebea0faeee98fe31217f3aa93c. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/NLQ271200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb03b7f9bf4cfced14c69effa544f05b10d9e9856b0128bde1551cce218aca1f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/NLQ271200118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42305376d4a7cc6fc94def057541f25a11085220fd2878f7d9b8ef295aa4fc9a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NLE871435605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ba82094d6dca900f85a997dccf1a3f3661b5e6ad5f27e7dae8eab76bb22987. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/NLE871435601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7122ab27b782a1ea4fc95e427ed6603de89e98e7bcd93a4cb2eb20e62c982f85. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/NLE871435606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62dd8646640820cdecc13e20917a19b8ce3b2b7b4d65973637e10e7e0f4af08c. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/NLE871430001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2175f055ff038a5adde90a1c2ebc65a9f5bc81af402dcf46a403239be0ee01d8. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/NLE871435602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa87f58ba3ce2ad192a63720637d4ef8918f8e0313e5a417e631301604ecc73b1. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/NLE871435603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4306010cb89d359a7c808d98fb96c73b6a30ae92614ee81a749c5f04d788daf. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/NLE871724701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29ede29fa294bb207140fe6b614836ba97f22bfbf50f809c115af32448b08a7. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/NL1TJ2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc61b86459e6718e22ce51771efa8a94525c466044833698131c55936c3f728. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/NL1TJ2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c97d40ef952d9c650733201b5bbfd9b347bae5d97b5e5e7bde204bfacce857. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/NL1VA2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3857e7efcfa81788352d8064b8030cd29bb0c896f8cd137f04c616786fbd075d. 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/NLE871334501.