Paulo Roberto da Costa, popularly known as Paulinho da Costa (, born May 31, 1948), is a Brazilian percussionist. Beginning his career as a samba musician in Brazil, he moved to the United States in t
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 0xff90bf998e0694f13006f9751fd83aec27e07f5ae83db6211faaac68881d58ed. 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/fcfcb465-9eff-4b24-864e-40662d71f0e3.json and https://artists.proofprofile.net/proofs/artist/fcfcb465-9eff-4b24-864e-40662d71f0e3.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 0x0043675094cdd8808aa7bbb931f19119d17d49c0d176ea4c8834e93de866efdc. 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/USFI87700264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa65c7679a57124424bf33c2c950870e32882315ca632cc0221fd5973c3ab1c69. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:13:19Z), 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/USFI87900025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479e83f0b3f9fce5271e22f7edc18991d29bc797997ddc2ab183033769ca815f. 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/USFI87900030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa431961dd832a7e91fe1f343baae1c551ede567ddb34c54dc9d3848c45a3bafc. 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/USFI87900032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2416807b1f74f51921415dfb24123421bee7a53992599c2bed069edbe25f3cec. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:04:37Z), 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/USFI88400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3479ee1e37a4dd314c032441a1fbbe8fbf6bbe87c39a3cf2fba4a0deda055d71. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:43:53Z), 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/QT3EX2453578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3f3c5646d31e51445dd41e9e8fe8f345673bf109a40f8ee5cc42d84d8a8b41. 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/USGR19700075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bda47ce639949297a56224b5cdfa9094c26a7971d3d0d5cb2e1cc96dc5cd353. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/USGR19700074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb746761bbc42a1231b1af5938136b814973a1051754c351b7dbbac9bd6cead. 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/USGR19400084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45079b17e0c26db077e1102e3a7afbeb9e57566a8c4b7b67b1ad93af89707846. 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/USGR19400088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b71bb314b39f4c634334cc3dfe04e3d12aa5acb180fcc7e6678b81a6d05845. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USGR19400091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03f83e1c0bcc90775d64ae2e15fd4ad158cc292f3bd6f5a41d230831dc3664d. 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/USIE19700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61f579a3edaf65da2137954b81592970fbb094e6a41ba926e8ab8abb5b92a34. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/USGR19700069.
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
Why Don't You Do Right (arr. B. Cunliffe)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b05499804884b175f70317fbbe3f3a3d24ed0dbc8b8cc5c2df4b93e38234ea. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/US37B0601261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298ce1bbb56226a57fda75aaa7674eeb87a1cd4a9682c2d9b6746099ccb3dfc4. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USC4R1504087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd45a6355f99c20eb02a5618001ca6ad68dcc447ba11d40f3781222314f58c44. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/USGR10110451.