Rocca may refer to: Rocca (surname) Rocca (fortification), a fortifiable stronghold Rocca (crater), a lunar crater Rocca (French rapper) (born 1975), French–Colombian rapper Rocca tower, part of the
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 0x114876bc112244809912741adcbdaaddd87fbfb2b44e4766f1c54edf8c7881fc. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2e662f32-4328-4994-a34f-ce2528a84ab2.json and https://artists.proofprofile.net/proofs/artist/2e662f32-4328-4994-a34f-ce2528a84ab2.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 0xd15ed92b30613d3fdec8a8c8c25c3cba3ab83a468e9daba2333ee0a12fc4bbc0. 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/FR9W11908455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1d961d77999877e5ce122153b36b07bc94ee62426db619327e805be9336976. 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/GBLFP2109147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345b06ac636b47767c98dbfb8b9292fe0ebad6345a7453f351fd82b1bec48b3a. 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/PLE951500248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d7ad971ce7b7418f8d6909059b3589c2947e41a9c0e28171454b5767953ca76. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR6V80258147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42cbc7da6c218a08af047e7f4d8fc1c05a4f2da3e332bf2aaf12c722bd40ec6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR6V80848503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a8f390d77b2bcae3f8df5aab6eb3ffff54c7477ea7bf0e6b50deac35758838. 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/QZGLM2535017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d651e7ef34ecc0e14f576c16bb617428ca3de75ced835f5573da7082ded7eb. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/MX3742400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2dc7471a814fde833fcae4facf1e51800e9c7dd7917f941742fec5f57580cc. 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/MX3742200520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd48bd95d489e5354870bcfe66caa1104717384e67c08348bfc074d23a4cdde8. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/MX3742400028.
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 0x05d33d62aee9cb983d0af184baf216f0057ee1356bcbd1875f9678734b584e56. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/FRX852204360.
Les vrais savent, Vol. 3 (L'anthologie du rap français)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d2d27b786b48507ad7c187702bd06ba6baf5bed63adac8ca88db1e6b5b8b6b. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/FRW889610007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a95198a9597c4e8f8db83257b805c95cfaca488e294bd26698e1759babe03f5. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/BRTRB2077499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786be2159656a136f4ddefbd72e250f5b269947f576919149e0919edd69876f2. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FR5R02113184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94610eb2dafb9042c0fae53cdd41b5f96dd796c63ec9444267ad826112f3e909. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/MX3742400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f11cf4c59ca04f883dd62db5d59381d43b241e5266d4e6a72b85e91255116e. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/MX3742300246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa44a954121ae393c8fbb123e43e9d08426c040907c06f85bce7cffe105cd610f. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/MX3742200661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc883c07d968b9f573f90475a9c877265d82d8af90aa92fc357381d17c85efd. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/MX3742400030.