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 0xf6ae9d191fd3be4ecceefc46319c0194b49966a840a69e29046e0d4537693df7. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/db1d1352-8f4a-46d7-878c-d4c1de0ebb60.json and https://artists.proofprofile.net/proofs/artist/db1d1352-8f4a-46d7-878c-d4c1de0ebb60.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Absence (Live at The Shepherd's House)
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 0xf1d163b7df6e3b67b51bb7385de9749e80eaae1b5179119395c1458d71e16078. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/USLZJ1896102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5eb1bdde627cdba5ff426f280b60e28f06d3974a79cb458395f86e4ff49ec3. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USLZJ1896104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e324fe4d7aa9376d5ffaebd9726a0d8e53b4a978f28adb2deeea7ef925c73d. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/US38J2118610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db4f954ecc864963706386700e655b7b008d5071143646ac5d87290c0495566. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/US38J2419601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a0939e4df55625b888acfdc5fafc1a3c6ada910263f59990014bbc495d5267. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/US38J2419602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659d2b00d13c450f21a43c39d780a5b61e4ee77bc5062dc57ee815a5e8bbdaad. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/US38J2419603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ffaa6287eb7dd766105ac3b770dcb5d82f9231a4e29d71ed85f32bc459fe91. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/US38J2419604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead4e81953e3c536dfa9335b67055166157f62c5dc2702faed80760a2db87b0c. 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/US38J2419605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa767b98fe6df94c5ae30cb93dfbba817efa759fecd630043b96bc8c97fa6b190. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/US38J2419606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb228bf2b1ee58418b87615bac8fd062b665b881ed1b8ba7aafb69071f003de39. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/US38J2419607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7bbecefaf2ea741db127083dc8dec287b14642e4206c631545066e59e3e6a7. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/US38J2419609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b61a3c49b7ddc94515d69e5e3bf0b1af658a36fdd45e46d9600f7840318019. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/US38J2419610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe619a97e944ed85f1bf7d995731641d6bc69504e365e5df90e66384a18b74502. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/US38J2520201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd76e2f4a7525ccdf7c9b1c97a2c538516867ac2f844114461fc3cbe341946f6. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/US38J2520202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb89aad01bbdf9e668792ee92aafe747fae68039d776ed73ed79913214c9471. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/US38J2520203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52272a9274974fe6326586cbaff141b5473b7de6650f8ec63e5a036526942b81. 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/US38J2520204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ae730ea6a1ea1b66d263a6e1dd612df6acebefc6e4f4a23b5c8254d792082d. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/US38J2520205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9347252e05fb317980c6ee84e6b139e1ecf2915ecf01123011cce67fadad9eb. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T15:41:47Z), 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/US38J2520206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5bf661b17766529c988a3b5375b2a8839ffd7e9dc1e129e573690427d9405a. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/US38J2520207.