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 0x826568bbc644299bdf5cb9f6d414108de8e8deca36303478231b4de840eb5095. 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/fdd67f28-849d-48eb-9a26-42fb90a2da74.json and https://artists.proofprofile.net/proofs/artist/fdd67f28-849d-48eb-9a26-42fb90a2da74.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 0x2a28c355dc6c7d0608c1028cca6a2aeb40cd48527afb6e1f6fd644202b5bc7b1. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/FR2X41426939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b118fd339a0b59d3ec4a46002c2847116f00939f0c1c5260358892d17e1d78c. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/FR2X41426942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcec0309930229161cff0c557c9bc884bebc6376a475734437373073255e15231. 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/ITQD01711904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb154efc11b1a1395cfb88fb91c9349fe636af5434479e4ae1de6a9a725226b0a. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/ITQD01711905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9dfc6a165cd70049890e3b9202905652baec68d07c0bae8376a6d3b68e2000e. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:07:59Z), 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/ITQD01711906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa508594dd5813a170448193489eb7ef5d2d17901a338dd203c0d12524eee9a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ITQD01711909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe07a9b6a51ed31d36764c21afc2f80a0ae769ba70b2bc9dc2b91ee7c6932a1ce. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:39:40Z), 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/ITQD01914301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870e67ffe8667e6340e76411b2dead3642b4b6632280e32468e7b3966411a3f0. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/ITQD02015701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab1c558d9840ce33c0a0bc44985a51405ee3344091a3d721885e50ebdd1291b. 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/ITQD02220001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ab67c983d23ba88f07ce31b3a1fde75bf7b507fed1dec1d70236f5a086121e. 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/ITQD02220002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24068c630a57a60595fad55078870b36df3ff7b338d035a489466385680e8d9. 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/ITQD02220003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ebb787873c24d3f27423507197f6020ec6e53c6efb17cefc16741ee46eec74. 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/ITQD02220004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa105de59c659408c76299b43ff32c1250296f7f99af3492449c4f69dee6f13d7. 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/ITQD02220005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6cead3ea136228dc5acc7f5527a28e8f0f0f78490f82d49dbdc15cb5d69656c. 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/ITQD02220006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe941965e909edbdc51e616f59e74c4b07f95a80457732956ac0a6ee200e12cd5. 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/ITQD02220007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a76d5b95926bc2e8fe502534d91d2841a28aa4bfb3574510e8102754e3b66b7. 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/ITQD02220008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13d5c35fd441e1b71f244540db0921b12cc9854048eb2255538c4a00a29caef. 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/ITQD02220009.
Capitan Capitone e i Fratelli della Costa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920c95835581d7db410f1f917bd474cdd1592d4ccd44acf7374855c467a0a941. 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/ITQD01609309.