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 0xf8a7428ffdc9a2d3ed4e9400071a0487aaa9696d3e96e08159a1738cde93f5f8. Chain 2 (Bitcoin): anchored in block 953954 (2026-06-16T14:18:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/25f63c03-a7ba-4c73-a8bd-9f2a2c655776.json and https://artists.proofprofile.net/proofs/artist/25f63c03-a7ba-4c73-a8bd-9f2a2c655776.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 0x5ae3a98e17bd55c12c50f12a922c15d9d68959d8e24ae3d9145a439f8fb71630. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ITQD02521215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a0683152570ba4a93dab7ae2f603d88dfa247b423b69c6082de0f5cbbfb62e. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/ITQD02521201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f23f62e34e43709218781e4f9cb1e8c8ab81f7e0d56466666ab2affb7539fba. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/ITQD02521202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1493693c9ae58c8477f5e9d61e7b8bc2192b443d1a56d74d9b6d169da135ab. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ITQD02521203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ced4ea34bdf7e1c77f1e6bd7d39e13b08763c171807daacadf168feae9743ff. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/ITQD02521204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f80d8febcb1a54e24959b9bfb6fa5de045a9b0190c3289dad83102f78ee9b6. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/ITQD02521205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d17a2bc3c8b59c3d272957651b8fedace73e752b12178be07876cf1f4952df7. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/ITQD02521206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc4ba998f3df9ccbed53f5864d6ae940b8691d25f1fddec67f89ea0859f8392. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/ITQD02521207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ab217ae96afc95c1908949813ad29cf10623263d144487393e10ae68529c73. Chain 2 (Bitcoin): anchored in block 958647 (2026-07-19T02:36:14Z), 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/ITQD02521208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x540b73b27d2d83489abb0d2f5bb9d31a6fe31d1272338be8833de1d118c99e2a. 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/ITQD02521209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237add832f82d78a5b143033acba826c0fa918956f8c9670ea055c7dbf074387. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/ITQD02521210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9f0624460497d3772310e0e4846ed5d8d1abbc98f2c3be4188890c66453be1. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/ITQD02521213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7067e23ece6479a86968473fc5a95a6b56ce0d0e03b079fbe6c0ff7862ae89. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/ITQD02521216.
Capitan Capitone e i Fratelli della Costa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55b256e71760e7e18cfda903c8fde952ba75c318f99c5d6b54e7ff96f9d9666. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/ITQD01609305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ca5d6d6d131fff69ee15e96e0c2390db6e28679543d7863bf041f1ad9b868d. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/ITQD01609310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f3e756020f155044cba7b9f8738503dc633a1e1f2405f2b4d54d029b833bb8. 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/ITQD01609314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860b7619cc217a842bb7592c62d7446d8b34399fe0a4698d86fad1ce231fb79e. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/ITQD01609316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307b43c337c7fa22c22e77b6d6ba4c7d9aabd36f93216859b0b1c451dfae5b06. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/ITQD01609317.