Sandra Prodanović (; born 1 April 1988), better known as Sandra Afrika (), is a Serbian pop-folk singer. Born in Belgrade, she initially performed as a backup dancer to singer Mile Kitić, before pursu
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 0x975268c1f7baadb036ad4c6629812150a75fd0f59dec6e3d51d147244997a385. 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/e83136f2-dbea-48c3-be5a-c800f60d8999.json and https://artists.proofprofile.net/proofs/artist/e83136f2-dbea-48c3-be5a-c800f60d8999.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Devojka Tvog Druga (feat. Costi) [Original]
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 0x55d810c44d47209b726773b371ea9440d044b66e9e9c1820397ed879233e6365. 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/RSA221500555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef0031828fcc164678d612c45d5202000fd36c13582ed0bcf554a3cc1f84487. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/RSA221834636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a0f2fd7ea30bc3d39e09205bdc944742c7a79672ce6cd8b4fe394e29ec2e92. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/RSA221834637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e9c9b9d4e06520be009d098095206866ae53fe68645d6b6de8f796f4b69ebc. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/RSA221834638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7e9d8edede81c7961117f2860a98bb7792fbf7d9d3ee9d3c8834cfa62c325b. 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/RSA221834639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f0a3fdd92263ddd37471ece9e04e6ec2f3bd36f69690d7a3fcd676dfa5ebcf. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/RSA221834640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb58b598134dcaac0a0a47605b04d488362281862ebdfbf1f083d555f34dd19fb. 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/RSA221834641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac24ba8f7252eca800e0ead2a465d02a0ec5dc746f329c3b65548a3d0d105e06. 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/RSA221600799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b07ffe553b8958067c78332d7d83824e42b3a15092b9b11739a2b97e5e03f2. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/RSA221900932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb038d6519f4d28b4b8166842ea13244ce3c66a0d1c70dbb071cd74c083581ed. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/RSA222010011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d01dc6d3d35901853292f36f3862117d5c33a0b722a5d40bafdfcdc26bccc0. 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/RSA222010063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6001d32c24e6d3e8c7d19ce5558bbba8f7edf22fda528cfa08da35530c20eea6. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T08:31:41Z), 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/RSA222010416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4bf126244043ae7c8ed1cf40e90623432b42f2127280f60f4acba97ad4b1d5. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:59:10Z), 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/RSA222305759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b6240bbc6962fc70a047d7bcec02167ba5085b3b1efccbeb4c8b534aae9bb8. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/RSA222308790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dfa73a3323a0a9b5148be408e8d6976c379c0ebd122755612f6214abd161d2d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/RSA222308792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab771e751c623d150bb32e7875b134a0a67b9626b3709a468dbde0500b1192ad. 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/RSA222308786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff00641b238da3dfe21c5c3ee6a6add0ee9d5bce8a60f6eefc661d59cc124990. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:27:30Z), 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/RSA222308791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc5a8b138d4ebdc7d9e78838ad3ea663c670dcb007a57069523981a87ab2fb9. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/RSA222308793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f4ffcd8b2e2ec3409c4153aae5bf883b06de36364612fb0c7377a71d4039f4. 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/RSA222308801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa28f69de8d4ac7879de12b101287c697260f4864903981ae7e775ad0ba148bc1. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:10:54Z), 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/RSA222309029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b266ea7df081009e65f84baa40bf53b7e005a08dd1ea4a5690a570658cc2e36. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/RSA222309032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88ffddf39060d9d861dbaed5f4c73c7f6b80bfd3988343e84b8f7413c5da9b4. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/RSA222309033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848c89a2ab176b8a23596efeadfdd99c767b578f7cfc4c3a69cfc366ee53f707. 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/RSA222309034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50a17cc4e1fcb446b8aa6accc637d53291bffc0d44d6f25dfd1a59b74b43224. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:47:30Z), 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/RSA222309036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef2de2ab82317fcf0ed9b0ea452a93449a32b4a3b8ce9e969bd2a9c52bec9dd. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/RSA222309037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d0d4db17e05be95126fe8c6d913c80d1cb984e9c5f617f11e6ab4acb71beed. 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/DEKB72430688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3955f66c7a00eec3463d980e8b5e237cce492ea04c95b8b770308c6680081b. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:55:50Z), 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/DEKB72535455.