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 0x21d84cf9d525ddea795b36d781f22e6e966f0ec81f284ecf96b1ab37878f6024. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/21ce20c8-4566-48ba-8ced-93374d436224.json and https://artists.proofprofile.net/proofs/artist/21ce20c8-4566-48ba-8ced-93374d436224.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
This Is Only Sweet (Dr. Drumah Dub Version)
Marrabenta (Pés Pretos) [João Gomes Dub]
This Is Only Sweet (Professor Skank Remix)
Marrabenta (Pés Pretos) [Kid Fonque Remix]
Marrabenta (Pés Pretos)' - Kid Fonque Remix - Radio
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 0x452f655626bea4254e44567a10fab36b161e96b8f80e795c85c2f96c76bc36d4. 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/UKYYZ2000293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54125abc50435f913d79aebdb405bf556dc0587e4f1e3b37a851f2f48bbe0664. 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/FR9W12333843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763e261a7b3e1f43079242b718d2481ab8e7039a948dce308318e98e96225c32. 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/FR9W12334642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x433807944993492e83fa985532ca4f19f48906436a493e5a64eb0178e0b1d37c. 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/FR9W12328207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0edfbdd331e0f9e5b4d2d02f709fa85322b813577866221c516d49d7b1c508dc. 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/FR9W12334643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c634d39a915d35104c912684088324160b908b8c313236e9b4b39e499ad6eb. 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/FR9W12334641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b3b9676ed92c730ec35014816329382b11e3470e0bb2034455e2b09346f35c. 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/FR9W12334644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d4ccd6ad122c8b8ad4d266a4681b39ecd8c19c1b6f9be016ab11d2f814596e0. 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/PTJV10900020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a6c070b0c8ea08f97af82de28944c9f97d95f129b397a295b93409fc8663b4. 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/PTJV10900021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc06ae9432f947bbee5f69f0b17bc3059dd32abfaf958192982b5496e8ccc0f48. 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/PTJV10900023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa079793e7b81ea34aedce65ad0a5c16b874bf1b0f18983c62f8cdb306e435375. 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/PTJV10900030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4393761d2d9c82fc4d5cbb1296c2772af46af9a207cd2c027f84776a6b8290ae. 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/PTJV10900031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3348aa6cf4e482e9c03035869b0619822eba0bb1dbd7c6585e3f293c19b115a. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:56:10Z), 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/PTJV10900019.
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 0xa6f8c4c649b1e227b8208850c74b70cb49abecb2ab347684a66dbb156ca3b7e3. 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/USCGH1496429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1a161f388c92039bcbadcc6344a9493910b40d2fab4547ab0a16b1c194acf9. 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/USCGH1496430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686ae64dfb52d27edc28dc99fb12d6b8b3694e1c5194c6a86c8dedb942522d00. 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/USCGH1496432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c25d9eb195f6baef2c5be84829dfb58895d89aa0af4cbb7770845b3de557e2. 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/USCGH1496435.
Sem Salário Fixo (feat. Sir Scratch & Capicua)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a235c79e7e365ed48dcd3769011094cfda501b48e320f3f746a71faacc9637. 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/USCGH1496436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefcd3ea5aae0b373f364809a60c94d2c6f46b4028270fdb0cc7bc6f754fefbe2. 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/USCGH1496438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9719a650e1c5d70b43ac48146e066b07a21de161f3704e1ed118ac7c59bbc99e. 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/DECY52500184.