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 0x3f0e71ac1ada8a20708579946845ea74c6b328a13ae53da15201df74ef0f01fa. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1d5d7bc4-f59c-4843-8822-cb5145eac1ed.json and https://artists.proofprofile.net/proofs/artist/1d5d7bc4-f59c-4843-8822-cb5145eac1ed.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Florie Brown: Best of Irish Fiddle Tunes
Garrai na bhFeileoig - The Hunters Purse - June Apple - Silver Spire
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 0xe219436d1d9a0553731ef5f42cc70540bd27e85f16468fef12337ad102e0c857. 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/GBCKG0500561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaef683f358b32ac578ad0ec130d9195046b1f9649b3545b9659fe45fd9ff83e. 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/GBCKG0500562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7f6876e4722478df4f1d2cc5e2bf1be0919a1da03a8e9934fcde35b5db54b6. 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/GBCKG0500305.
Merrily Kiss the Quaker - Morning Dew - Loch Earn Reel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46cf2ed80f3add5a4cf825e09dd78544de2f780c6ad04fb10ccd75daf893ca3d. 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/GBCKG0500563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266216ac3428bd58ff19548bc3ded0c988421a15f9f3ad80e9109379e1ba4a63. 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/GBCKG0500564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1bc554cb0fab5be02e2848364b0ada5c8a2dda552b53f857d70263000db1c14. 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/GBCKG0500565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9cdc9bce7d9343e02688b3a225d3ed031f2452f6ad9f6cc8664d1ee401094d. 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/GBCKG0500567.
Headed for Home - Tune for a Found Harmonium
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644271d4940aba6a5096a16cc13d1ab43ef9f95da66fbc1b086daf12b0f9c96a. 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/GBCKG0500568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd1d0db33ea1892a47f81b1e8b5079440cd50d02b82c161a810e87710301fa3. 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/GBCKG0500569.
O'Dowds - Master Crowleys - Dogs Among the Bushes - Tie the Bonnet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ca65fa2b75da8f2dab4d2827e6e8c12136692ae095ae2b3436418e270cb192. 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/GBCKG0500570.
The Girl that Broke My Heart - Cooley's Reel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc2452def8aaae746d26a2d38a372c3d9344b4384ca4f2ffeefbf1d365a89b4e. 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/GBCKG0500571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f2128b838918383272549226e166cd8c7e02e2303c670988ddad8e0b19e11c. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/GBCKG0500572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39fbb943d17be5e52211c17ad3181337edb3f31a61874076856bec6b7027dee. 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/GBCKG0500573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x599d6a39a773e88fd471f071e84ff79f98ea628e621214b58f67f2b09979a0c2. 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/GBG5X1203141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65d21718c8a6d3386db745a2674bde65dea189bf59b19c3d81dbafb93964982d. 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/GBG5X1203143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe57dec2ef94b70798d9bd30c8ade7f062ca18d5f69c11a65761e5f2f67e8dc5f. 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/GBG5X1203144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb7dbc494cc4a0b63751ea90371c1582a5c2a2470837d771151f164764778a7. 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/GBG5X1203145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2acf9fe4a86725e8b716128256010432d2230fdb49c2aa41db88864518ebc6af. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GBG5X1203140.
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 0x9c76394a90ed95dd65370196f95b91ffb218e2b827e6fdf85eeac5d13827a686. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/GBG5X1203142.
Margie Butler: Carolan's Draught - Celtic Harp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8964c7538da81bee8fd75b1d326f73f8d9509e3b1a1b673a4193a2ceddd570d. 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/GBCKG0500940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d578dee20fbf635c9525b4b3cbfc50b3288d564a9413f3055a1e4905f7b800e. 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/GBCKG0500941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640cc15676ad2b27986eb7c4866f621a92a9879c3c68ba0c7e22ef38e9693f8d. 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/GBCKG0500944.
Mrs. McDermott's - Planxty George Brabazon
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd930f61d83bf6d7450114ffd9f3d9ace93184f41a0ca2d0da6e93a0669e6665. 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/GBCKG0500945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1588c1b457b50319272dc28dff0866f40ec11532d141bfc9f949455810ac6c. 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/GBCKG0500948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0f32dd31c050563b07465682f55aa213cfabf2f41d9f45c71c53e1bc7530ab. 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/GBCKG0500949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0214f71ad6162fdd0fb6d4b7eeec0322a3ae50345551dbd33ff26fa08d43ab0f. 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/GBCKG0500950.