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 0x565a07e838f76bb25b8591b4df00b9f90111f572ca7ace8cedb84644aab34411. 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/062c352f-5b5d-41c6-83be-09243a4c5125.json and https://artists.proofprofile.net/proofs/artist/062c352f-5b5d-41c6-83be-09243a4c5125.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 0xb594ecab4e9991fd2f13090c0a6bd87c4339ad4bfca91316d08a23fee4083548. 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/USA2P1855552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0385fd68b366f4f88e3bd0eccc92ac040a876a3ce4493f2b84ff68e6f9b66c49. 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/USUYG1484784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff701a61515923d80568ebbd53dfb70e5358b68df28f081c34468c1fc3ed32e. 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/USWL12303292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff701a61515923d80568ebbd53dfb70e5358b68df28f081c34468c1fc3ed32e. 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/USWL12303292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x083eb516dd173682ebe7e8b7259e913248255cd7b936ed9e488133b1bb49885d. 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/QZW9K2374400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc80f6d9764d78bacb9744dcd44e9b8447368cddb7db82dbe2055258852c939b. 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/USUM72120261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ead47939f6f55e46603f17d174018a195dee94be4dca6f50b0b781c062ad960. 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/USA2P1546644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a04fb884c101dbe2777d790c553ca64d16cbba01b90956f7b2a0915caf913e1. 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/USCGH1444222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0bd8df680c686780f4ac53e04f323a5d139f39c6720703ae4f2c378a67da595. 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/USCGH1444224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5e5bf025067a29e345645e19cf8efdf703062e024c9ccedfa64d0de4777494. 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/USCGH1444225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c1a51719ee017b8c14c535707bea59dd1f195c031e6dc785205cbd483472057. 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/USCGH1444227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b01731fd908078c09d199292675c90bb88e9dabb08f0358587099df201adf3. 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/USCGH1444228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b00b50475b6829899abbc32b37d8784ddb0b1aa8840667ce9aa48cdbd38190a. 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/USCGH1444230.
Millones de Casos Sociales (Feat. Raudel, Charly, Silvito el Libre)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb5d5c5e28c90c5ffd2230a2e929d3d79d81bb9d35813d72f043b70ca8166ae. 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/USCGH1444231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d072361e6035e46c30043061faab2745ca76ba02a7f750d193ea1ab88a5417. 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/USCGH1444232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33b62407cebf3b553a877ac25fe334cf4f7aaa03068a99540afcc641bb186b7. 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/USCGH1444233.
Tu No Queiras Rap (Feat. El B, Juaninacka)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f3e86aabf701795fa09c815ceea04a876cf80b52579f87c9b4dc4c13af02c9. 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/USCGH1444235.