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 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 0x130d6c32354d275688a1aa361887a6d53c0928945db3bc671e6d47b1707708e0. 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/94cb06ff-3e7c-46e2-93ea-d1985724f89e.json and https://artists.proofprofile.net/proofs/artist/94cb06ff-3e7c-46e2-93ea-d1985724f89e.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 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 0xe4374bfa0ca9fbe10316d0f7b852677aee6e7d82af20167b29a80df6e67fc8ea. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/CBEYJ2444227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409d848a37ff492195a7e8ac47b3984d5b96acf4a12253f1b62baae3420486da. 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/BRB5A0900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409d848a37ff492195a7e8ac47b3984d5b96acf4a12253f1b62baae3420486da. 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/BRB5A0900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d426e571f220797ef5e1b6dd507b7eeaeca48f421d4aac456f6281592f70ffd. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/BRB580700080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b54fe50fe2604fa3b99831fdeb20f287a84f49acfe8aec114ecda27e959433. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/CBEYJ2478454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9e5eb69aa341d8c94cad1be10245b8100603e3883fec69202d00d20a11a182. 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/CAENV2509838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec05a095b759981f61492491c5a4eb20894d2b21d66cbb92d1b2765020b0598e. 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/BRB580700082.
This Guy's In Love With You - Bossa Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b81cfc96a70033e3e7629195aca648c47967d2bf2c595c84278a7dfffa1c4cb. 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/BRB580700081.
Do You Know The Way To San José - Bossa Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d426e571f220797ef5e1b6dd507b7eeaeca48f421d4aac456f6281592f70ffd. 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/BRB580700080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a6c9679d579d7427a8c42580d1584ab41e506ec9e3eea2289bc32d53e8053f. 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/BRB580700077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ea8846ba2fc6f846367c270a61be04904e89adab62367da034a20dfb50061e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BRB580700085.
(There's) Always Something There to Remind Me - Bossa Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396f62bfc6c8befd678e3ee12d7f0be7bbe0ec23d5bfed3e6efb1145de17f711. 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/BRB580700084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409d848a37ff492195a7e8ac47b3984d5b96acf4a12253f1b62baae3420486da. 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/BRB5A0900002.
Cafe Bossa Brazil Vol. 2: Bossa Nova Lounge Compilation
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ce8f17fd534cd1b54acbf795bb26f388ac4b6e7695c18300a53286f79e3309. 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/BRB580700078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5d2773fb1b0a5df4ee6d9a8f42c601eb99edb34f4b9db1e94622256e763240. 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/BRB580700074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41fcb8589464eba674d90b9252e474ae6e27b528d706f5fdacfe13b0379499f3. 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/BRB580700075.
(There's) Always Something There to Remind Me
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396f62bfc6c8befd678e3ee12d7f0be7bbe0ec23d5bfed3e6efb1145de17f711. 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/BRB580700084.
Raindrops Keep Falling On My Head (Bossa version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8baf19acfb8091be89b32b573bb0694a79f0c2c9972a12a7383bb7c77555cefe. 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/BRB580700083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ce8f17fd534cd1b54acbf795bb26f388ac4b6e7695c18300a53286f79e3309. 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/BRB580700078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa3303e6db95ef055830ff56dc5e6842ef6fff85dedeb43bc41e1f0041a89500. 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/FR6V81540554.
They Long to Be (Close to You) - Bossa Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82dbabe900641ff5e69f91c38fbb909e54218fed71540691f949591a2d1f29f8. 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/BRB580700079.
What the World Needs Now Is Love - Bossa Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c60801d01b27a94506bfd941a06097decabf23b151e205edc4b0472798e2889. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BRB580700086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708d2fa17422f4dd5496c95b43d68894e9bc037d5f5b91fc2435a2f44fc33344. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BRB580700076.