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 0xce3f8c5fce0013f90348bf082eaa384d61b6c7435176526730ca4048c09dc9e2. 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/47c0e235-d289-4b71-a17b-b24f7fa05187.json and https://artists.proofprofile.net/proofs/artist/47c0e235-d289-4b71-a17b-b24f7fa05187.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 0x7e0d69c5facc74abf786777237b02d77472ecaa7c68a59f8d3f91614af8b748e. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/US4R31334013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42934370777c3a3eff671d45cdc187923389fbab051e19eb03896d003160ed46. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/US4R30605138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x517ff5b71719e4b1ff51110b82fdecd3b7a1f21f85c5593e925a6dfd4a1e34b2. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/US4R30605141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54261a820119e154fd92a7550658c4a903f3e17e1330faa9ead41d01aea08640. 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/US4R30712839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0af6a1dc997e7ffcaa5390f532c82dd2dd74bf3547c98db57602f46ed09a24. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/US4R30712840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c16a7e2863201f5aa6b0930c9547b136d56f18f698d7b76ceba67996b4b881. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/US4R30712841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1a6d3b45f2b3e2d938f09aeba200d32562a9c4eb17a4672be7000d9bd45d63. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/US4R30712842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b4207e24f8104e6df78774821cd23c510d6217ec108d798ad105a7d05a7c28. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US4R30712843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801f347ee781e395fe8b16560ef211a99644e7b250635de35e1dd49453758c82. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US4R30712844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6bf4d32b75c2ebc9ddbc644566ce13e07e66029ba43e2c222e5d356828dff2. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/US4R30712845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a05b3f34156e6a916cd4a93dba7de547d1df4a20a4b96da9f7c3fb33803ddb5. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/US4R30712849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf349c3fd6b16925d446360de16f3bca196b7e4e408293c770543aab0e329e21. 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/US4R30712851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee70330d5430c843d73f83dfbcc83848b587c38b95030d49883263a5edf9275. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/US4R30741276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a39042b862c0d3b1674b8e8073c277bc4a92fb975cc896ac5e272624be85028. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/US4R30741278.
Heart of Gold - The Instrumental Folk Guitar of Peter Pupping
Relaxing Guitar At Dusk: Featuring Guitarsounds Artists
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d1588c8a8ca1a3747d1a85323c67cbfde3ec97f4a1294fe11ce7c7f1e22efa. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/US4R30921407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8947b83ac85c8d74b9df94fda8a00c72a620ac4d3360c2979d433dda44a666e7. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/US4R30921413.