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 0x173324d006afff08058ce3bd73125805a59d419871e18c3ac89ebe246dee2c22. 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/4dc4e17a-3757-49a0-bd54-998766242039.json and https://artists.proofprofile.net/proofs/artist/4dc4e17a-3757-49a0-bd54-998766242039.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 0x3bccd12504a3ca7f1e088183fdeed03311653461e9f422a41d3a7f81d0d7e844. 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/USHM82277786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ccda9ae5d9942bd77fe71feed2974846fb3bf0896a08d0fd7e920d0df7e7d31. 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/USHM82277787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe615a0545125b40b4de269dc3513c6f26314be7f47538371d9eb0969ea29578b. 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/USHM82277788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c28f36457a25412c2fd786fc3bf12212ea77253f90ec55fb0bcff467f30c85f. 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/USHM82277789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae29317b12d5235a20456604d59741e03447c3cc59ca386d4dc42334dad6271. 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/USHM82277790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c3d654b824317e1af17e3c10000e4d4136741ecd8ed6b25f84164bc97eb6f6. 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/USHM82277791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d378183221660599930670030bee764b7f5274c253e41a2e361b2fe4f41654e. 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/USHM82277792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d5d11ff61fb5683ea50cbb19a47e245aa75e7b36af60fe0598991ecd1e48cf3. 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/USHM82277793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x882ae14b6494cbb2bf4910f3844998d85d30fd6be4b3056247006c6e32eab6b1. 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/USHM82277794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62de8834007163c15754b087250364611bdd3c45db43e3923722bfef310a6f2a. 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/USHM82277795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb777fb866a2430d982163803f248c08329555d09d5eb886a7bc0d4dd1d953c70. 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/USX9P2330037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fbba85c066f480b218e5c79ae87b332818e6e40d9c1690020274b3d4eef7ff5. 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/USX9P2330038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362236f7e32d76d6314f7476619f59a812a26139cd1d2468d03a177650b260f8. 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/USX9P2330039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b5bdb3b8bdb69cbbb9ff4e654a6fe9a47d261cb6b1a9cfcb60966f2394b717a. 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/USX9P2330040.
The Silver Spear / The Congress Reel / The Gleanntán Reel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3556ac3a1bb0efdd36456f915a5cba7f1852aebd43d49fe2f23723b4df92127. 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/USX9P2330041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bbd29fc84ae61d046c9352bc0292147b44e115775eca6a870e6f86211e2ed3f. 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/USCGH2358246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe615a0545125b40b4de269dc3513c6f26314be7f47538371d9eb0969ea29578b. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/USHM82277788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe615a0545125b40b4de269dc3513c6f26314be7f47538371d9eb0969ea29578b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USHM82277788.