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 0xcb8c940816467f6f471fa21bda91bcf4da7f00931168f0060d16eb98c472cb52. Chain 2 (Bitcoin): anchored in block 954050 (2026-06-17T05:14:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/42e15992-6b44-4066-98cd-5bc5e87f2159.json and https://artists.proofprofile.net/proofs/artist/42e15992-6b44-4066-98cd-5bc5e87f2159.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Golden Age of Light Music: A Return Trip to the Library
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 0x51cfb8dbfbaf8e3f0f1b507f405d2d2d0602a283bd97214319296da16618a76a. 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/GBBGL9400596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4117f24294284ff6b4b237ea4770a293b472d7e42b65fbfeb38974273cca5ee. 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/GBBGL9400598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a66c5321fab6801ad4064c76fe9ea20751b56c3338eb4956ffccf7b75daa3cc. 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/GBBGL9400602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd05bb30f9bb327e4cee84131d441d5a59fab1764327b8678e166e511f1aa944. 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/GBBGL9400610.
Kpm 1000 Series: Archive Series Volume 1 - Light Atmospheres
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67950689e3eff916f5abeccc872e96152d1a63980cbd91f28e6c2cae19b8284e. 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/GBBGL8000218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de5c58d0df90fcfe701d7f3b1a53c3b30e116df0e36994ed09df97cb6b40256. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:26:57Z), 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/GBBGL8000224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de353fda17c6663ed1ddced4e61730a1d85a01068a6d377909af4817a3e11c5. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/GBBGL8000228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0df6734572bfc01a36ae66922670f44fba25ed3da98fbd623670f2ffc0a9d9. 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/GBBGL8000231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3d70755e4d9a32eb39549cd82a617332857297805bf5cf5df0256b2f1889b1. 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/GBBGL8000232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac92fafcba8032fcd4341a00885b9c0303af972d6b94f84f53e0a38435e4325. 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/GBBGL8000233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079e003b2cdc76453f0e8b89d086a332e16b1335c456b713220d6ca5aae32b08. 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/GBBGL8000235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbcbbf4383471988030ed6dcdf2a8cf646e26047beff89a12dfb805c8c39dca7. 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/GBBGL8000236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe406bfd46599a42cc98cd0161feeb4e2a03c077f2ff4ae3961889698458792e8. 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/GBBGL8000237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabfd99818940cb171d1c9909da4c1319b86f268bd755a5f17e434f288c7e653d. 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/GBBGL8000238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0dc62ee7329c2e7ee25c289d07345157d25d5484ff6758ff594fd194b06d181. 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/GBBGL8000241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x775b45aec4e9440c885e30918f34b19be0ed5c399819e072f03ed9b1444b8db0. 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/GBBGL0801528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc4f776f61e15a3c1e6ca2bf2d1e6260fac9dd72529fbad7dec0903ddb723671. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/GBBGL8000252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a1785b92dc875dd5e4d409b0232051af90bfcf0a291f0c16840242944464439. 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/GBAYC1101542.
Schubert: 3 Marches militaires, Op. 51, D. 733: No. 1 in D Major (Arr. for Organ)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552ab428a5ec0554c391df4ee2f464795c5b4ad78c0fb368675fd784293dca7a. 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/GBPFW1100151.
The Band & State Trumpeters of The Royal Horse Guards