Cassandra Kouremenos, known professionally as Kallitechnis (stylised in all caps), is a Canadian musician from Montreal, Quebec, whose single "Gifted" received a Juno Award nomination for Contemporary
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 0x4719a6a7430988ec6a63a76284a5b2f5e7787623e8b2c52ddbaaf9a371bfbb25. 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/d3969539-a4c4-43e9-ac4d-81dde0594d9c.json and https://artists.proofprofile.net/proofs/artist/d3969539-a4c4-43e9-ac4d-81dde0594d9c.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 0x4ce29506554b3d9508fdffc632b6610abc0fc5dfaa5782b97861574c941ec2fc. 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/QM24S2105841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b839741819063e20358d211c43974a086495d84928999adb2d96a1e9d758fea. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CA5KR2152705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b16eadde90c650c43d1c212cd6a77e978dbac16a05b447c2f9d60b217bdeed1. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/QMFME2333128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79eb2657f35be3fb667354ce2bd817277dec2e5170ec8ac0687db579b23088ca. 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/QMFMF2314290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab9844ba00a83cc19895481aa2a1a305a74773dcf7eb245807d8a31c3fb9a7d. 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/QM4TW2434042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612fdbefbe5a64349d3d292e10868b5ccba26c1870d41163e4c5792fb759c49a. 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/QMFMF2314214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc647e17322f6d59da87609600bdb0489214b1c5fb629a467699485bc4451f618. 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/QM4TX2407163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b10a0b6413504c8aa8a0296a293993b72be34480586ab98109ff3925af1ffe. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QM6MZ2494966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc647e17322f6d59da87609600bdb0489214b1c5fb629a467699485bc4451f618. 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/QM4TX2407163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612fdbefbe5a64349d3d292e10868b5ccba26c1870d41163e4c5792fb759c49a. 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/QMFMF2314214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab9844ba00a83cc19895481aa2a1a305a74773dcf7eb245807d8a31c3fb9a7d. 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/QM4TW2434042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b16eadde90c650c43d1c212cd6a77e978dbac16a05b447c2f9d60b217bdeed1. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QMFME2333128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79eb2657f35be3fb667354ce2bd817277dec2e5170ec8ac0687db579b23088ca. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QMFMF2314290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b16eadde90c650c43d1c212cd6a77e978dbac16a05b447c2f9d60b217bdeed1. 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/QMFME2333128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9045fdee1bc9f4ea159fda4415c84fbf1e7290b59f94012256d69286a83b5638. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/US23A1565002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f22b58b03b2155df7645338e5a340a89222307e20f1977ce13cbda612f5db1. 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/US23A1567762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50b5950302ce1e8562af564bb2f807731109a71135e75afe87d070b28ff39ec. 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/US23A1567763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x675a8a6180746d4c2146bbd6b05494c085cccaa6cbabfafe7e484024b68169c9. 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/GBLFP2358768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9045fdee1bc9f4ea159fda4415c84fbf1e7290b59f94012256d69286a83b5638. 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/US23A1565002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bfc2196ed1072de4f7a94c019f8ba1b6a26016b3de0c19ae22429c34860b81b. 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/US23A1566844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9045fdee1bc9f4ea159fda4415c84fbf1e7290b59f94012256d69286a83b5638. 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/US23A1565002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e1193094d3d0c8559e6d8333f560977a743546c25df37eec065385a1a24cb4. 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/QM24S2205290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97fa78af2d6eb20076f1097b1771452fdd0405def9201856191beda9cc8b7d5. 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/QMBZ92254419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50b6a84f951380f9e0e1313c7fceabc12e0aa50d7128b2021acbe279967d4f2. 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/GBKPL2204581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859c73d7cce3f654004fcc605342ea5a1b5c43aa784493e84dd7d028dd36c24f. 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/CAOSK2200112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb2daa65c35ed06d597f933b18e9444da6e719416874beb1772bb14a49e060f. 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/QM24S2202140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006ba40c2e6494dc70dc9dda93434970f46f6aa1c7ace3e7c625aab900745751. 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/USUYG1420020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba844c25174cd13e3ecb43e6bd555a31b7ad1174fd0e3cbd71d6a02385a7a78f. 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/QM24S2200259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e06fc24edb1b703f6db830b91bf5f6c2b9c1ca1ce84fe0a4f99b338e953d264. 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/QM24S2200258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7e2cb16dd20a4f00bcc5cc06b87a9170b391e1d1339fe07fc3af0e080a13f3. 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/QM24S2200212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e4b082fbd8460abe347bf60ca7eaccff9ed005ef57a95ac9a221eaa6d4a8fc2. 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/QM24S2200219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18fe4e93ab248a34f0503b2386afe51c57728a8da5c61220085bd71845365ea2. 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/QM24S2105845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4117526e334ef5fdd0f896223628440671e023487039db56150426ecd128d6f. 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/QM24S2105843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457b136b3ea247331edbe46b6e7d5e9fe3df1403216587e3f00e231fe30c477b. 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/CA5KR2162999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x536017294b9b4897b4e59fe660d93a3f8b01f175c4b39709dc1e87369244703e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM24S2100667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cfdee3972b0720268fb0415562e63238a3ef29df09761cb14ea4a54c747dfdb. 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/QM24S2100420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f9532647cae4822c6c51e2232d0bade5af8616e1889852b4c0dfa48f978761. 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/QM24S2009735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da960a92a44f7039aa56d5111f2c4476c6d4bb1654df34fd2fa4c82341699bc. 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/QM24S2008302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710195c815bc2f6589dc7fd3cca168551997e566292ac18d57240658ad1a6e4c. 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/QM24S2006559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80605b38365904b686d027b096bedfae9f21b87659d932119735adf4502f8ac5. 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/QM24S2006838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18dc41ee1af45647d3c661626a5c550ab3f8f6abc8c12d72509ef7c81369c623. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QM6N22416855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b839741819063e20358d211c43974a086495d84928999adb2d96a1e9d758fea. 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/CA5KR2152705.