João Vitor Romania Balbino (born 3 November 1994), known professionally as Jão, is a Brazilian singer-songwriter. Career 2016–2018: Career beginnings and first album thumb|upright|Jão performing at
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 0x1c664fddf8e4cc0241795ee47e25dfeadb2f3b6730253dc6472e7ccd03ba3af9. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/29a2545c-1036-4a4d-b49d-ee24f439945b.json and https://artists.proofprofile.net/proofs/artist/29a2545c-1036-4a4d-b49d-ee24f439945b.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 0x8b2a3cc52c11b702de73647b3835fe8451b0ee2d36c313f755fe611633d5350f. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/BXHAC1700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b5784b60d3de2d2b7605ac50dfccf7c5a46117cb60df83b5ee7d1691954f32. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/BXHAC1700012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad7392eb9b4e809e552dbb52aa5843d246b3edea925e567574dbff1936fd295. 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/BXHAC1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21fba014a988058cb4ad1c4fa9a4f8c63fe6bdb92b5e17de8cf1e6ec07006c3f. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/BXHAC1800025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x690383d6dbb2b49020d046ab8f3f2f8c24704c3f5aa11e59088a831491a19678. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/BXHAC1800050.
Monstros (Ao Vivo No Rio De Janeiro / 2019)
A Rua (Ao Vivo No Rio De Janeiro / 2019)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ad17e4b689f9c2ea88f42fc9c47bb3e486e291aa1b038317e98467943f9c2d. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/BXHAC2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e129d3965b16419f62b778c98b416ddf50913de736fc8fb1b5ee71a99382c81. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:02:40Z), 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/BRUV72100599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572a98f35085fb0c06451ce8983dc37bad1bc69f13caac9ea7d650924a87b1f8. 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/BRUM72400162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d9ab7ca7a4a5e093282706026dc9d898c3249be51f7f47dc64cbcd46c4cb2d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRUM72301542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90f2d2fae36e15d820d92dc7e17346223ff28407d7773ac9d43971ea07154b8. 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/BRUM72400940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6053808df6c37ad0f541b8bdfa7a4bd856881a1d4696385caf3972cf90dfaaa. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/BRUM72400935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b39f9b690c7743d9041e77d60e90462a7ba396aea1fc1b501b7110d057e42ca. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/BRUM72400938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd67f889e6ee8f3b87e45fe4d8513eef1e275cc1c38679b92ad8ee2b4d8d2d57. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/BRUM72400939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fed2320ef92872aab8b16275a227cbb3e9ac20bc57480aa00f1790a8dbf0f14. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BRUM72400936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ccb39d95acca54e514cb837f6d2b8b0d9b130655d1d4b2267dcc22ea37a165. 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/BRUM72400937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11299f7228f07073b3c2c7fed352a53ecb67bb6a10d09d0fba9dc0cb14de523b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/BRUM72400941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aed5066d66df3f51767e9122c2eaae3fe16edf744f74961853b95c6e328df59. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/BRUM72400942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4426b63361c4fdbde0cfc53e9a73e0410e6654ff42bb4930aa709ebc517dd96d. 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/MXUM72301414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4856e20fffbe4b297afb313a355efd94003b020620aef017893c2cdbd13b6fb4. 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/BRUM72100655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4856e20fffbe4b297afb313a355efd94003b020620aef017893c2cdbd13b6fb4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRUM72100655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f41206ce4c749283e1098219d87b8f2849b16463f654f3fbb2aa0131c5eefb. 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/BRUM72301230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b26e38e7565e58aebee5a557a24ff68784e4287e417560f7b7500643dd41fd8. 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/BRUM72202293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b1ceab51ac4f1e6d03ddbd164a3c9243a4e27adb34b24b2b6614513b369a67. 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/BRUM72301231.
Minha perna, sua barriga - amor da minha vida
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x922b959bd659d346fe773568fea0f5edacab245a28af8865501e5b64a22c95ec. 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/BXHAC1900060.