Bossa nova () is a relaxed style of samba developed in the late 1950s and early 1960s in Rio de Janeiro, Brazil. It is mainly characterized by a calm syncopated rhythm with chords and fingerstyle mimi
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 0x2d896de021f24418ee698354291d7254e132dcb60781a8893d02583d6286bc35. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7cc437ac-932e-4edc-888b-ca055b9eb425.json and https://artists.proofprofile.net/proofs/artist/7cc437ac-932e-4edc-888b-ca055b9eb425.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Bossa Nova Tribute to M.I.A.'s Paper Planes
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 0x1f97544edf94caf5113b4befdd8eb3daf1c1fc698bcdc9558763246c0ce6ced6. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/FR10S1760135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf75a33db8148baeb5f8b8a53aa3c1dab0b46a7711542a4dce7103bb1ec87c044. 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/FR10S1760136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3aebc64f1f692dc5c9de67016082a3da1400c355ebfa9663c666a3d90fa7c9c. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/FR10S1760137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0081b40df770aaa5f43a3edd76ed40983f2fc91353746921050294db39d2a7a2. 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/FR10S1760142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172b76b506ecc52ed781362ca9e988690ac52470a697a9c543d37df99d441563. 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/ITR551317207.
Chill & Caffeinated: Aromatic Café Jazz Sessions
Studious Samba: Bossa Bonanza for Brainwaves
Espresso Escapade: Jazz Jaunt Through the City
Caffeine Dreams: Bossa Nova Grooves for Cafe Conversations
Study in Style: Aromatic Jazz for Intellectual Inspiration
Serenade in the City: Bossa Nova Tunes for Urban Exploration
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e0f21f89419a6bebea7dec6c92924836277470791ff67d72ab3816a9aa98cd. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:05:08Z), 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/GBPS84613968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32eb03f30c5804d0ec88028acc0f232d5a5b9c2ebc5adb8d4277126be41ddceb. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/GBPS84613970.
Tango of Teacups: Aromatic Café Jazz Fusion
Soulful Sips: Aromatic Jazz Blend for Cafe Relaxation
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9293bb6c98c590649652ef8ee199a630c47b9daae684fb3ebb8691cc5e8daea3. 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/DEAR42578718.
Nebula Noir: Jazz Music for Studying in the Dark
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203aed29d637970bbed5bbcf725c3d8aa06e5809edea09615b5566aecc8fd628. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:13:13Z), 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/GXC5E2419528.
5 Hours of Relaxing Bossa Nova Lounge Jazz
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa828a1df0bd5f6362fa46f4bad2c79268536cd2687647146d8e41614e54030. 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/QZAKB2416404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392308a316202dc04591f7eb09ae22ef393cc36b17d4c86346145ba296f46383. 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/QZAKB2416406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc420e8dbb79e1facd6756873094d0b7f78d92b5248b6c66248b63811be8b3caa. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/GBMA22331489.
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 0xb3d0822015b4ac55975c1ed17e0b70d42b6cb7cf39e3542eabdb9e1ad0fa9aa9. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QZAKB2416405.