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 0xee6459cbd8901551c8ec5128c301a6d78b3f870ce659487c9e217e4384635c90. 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/26984c71-d52e-4b6a-8fb2-3c72b242cfa0.json and https://artists.proofprofile.net/proofs/artist/26984c71-d52e-4b6a-8fb2-3c72b242cfa0.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 0xb470624ad7ecc50709e1bb5d7b2654d0b36eca733f7ae5f218cf7cea83a3a9fd. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GBUM71501021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5fa2d4903795d1f0f4b9e8b0291750aef85d222a0169ef8da40b5fb12dc5b5. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/GBUM71501022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b22e47a4e8a544e14feaa2ebd78046b122b93dbe905009fb17a3686b975ebd. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/GBUM71501023.
Fratres For Violin, String Orchestra & Percussion
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bacc9d4348026f0cc1e356673bdc307584e9ede707944952465e30bc6bb6447. 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/GBUM71501024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e3ceef0017a10944e2b8583b10c11849269239d42a92e2454aedea8e1b36d9. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/GBUM71501025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df19c64e6d5f93b62da943e7a5dacd477c65c1b383209f6aab2bfabbe166c90. 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/GBUM71501026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2037523a4c65aa61b2ee8a25f49bb016e62e2f214283931f4c8acf4c26e5c36b. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/GBUM71502817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff2549029d89ac0128c5e3f9022d570d333c872b4cf58b3bdb4b9542e6d175af. 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/GBUM71700634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656d3fd26abfcf9e386a54e586393ab9cae2ff3e2e987e59d2dbb5ba32527d98. 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/GBUM71700635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b71d8fc24cfda30b4eb2f98bd1f91ff418459e819bff87ed6f280e84268066. 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/GBUM71700636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63617a2adcb44ec5a4598599cdacd0ebde13ff3c62078354d3be23587c7e237. 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/GBUM71700637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ccfba465d87b4692d394772392ddb53095e93a4e5d9b3f7eed8bf7d47d1950e. 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/GBUM71700638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead7694daf1eb3a32138e6ca37068e16e1bf7279d761717b0c9487e054337291. 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/GBUM71700639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c6d118f7e8fc9b40f5646f3b0910c9e95efe6de7a3d7fc1b5d1031d27b5839e. 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/GBUM71700640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea09ec9051e4505be26d312669e787ca097f8bfb707c609577cf7c40ab4d8c5d. 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/GBUM71700641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c021b08a233bb06895ef74fe0996b8116b1aee3f7995257cde3bfde6470142b. 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/GBUM71700642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6be84ce1bd61ec49607ae29fc78610e7f1ac50dcb863939bb03c6ab4ee34aaa. 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/GBUM71700643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf566d65207db07721d5580d2890edf796e67e4775697fd29de407b1b43cf5a9. 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/GBUM71700644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3927ded46e395e22818323f8672a0480c2b3570342a358c0d01868669f2283b4. 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/GBUM71700645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656d3fd26abfcf9e386a54e586393ab9cae2ff3e2e987e59d2dbb5ba32527d98. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBUM71700635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87783b055f812b30935f9edec68eba37332ad143ff465e2d361fea57f44e6bbe. 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/GBF071602090.