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 0xaf4aa3f816dd3de361218ed5030e409bf427227f1c5389a5cb4d3c5496c6328b. 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/78f5249b-b7fb-454c-8f86-31d47cb68c0a.json and https://artists.proofprofile.net/proofs/artist/78f5249b-b7fb-454c-8f86-31d47cb68c0a.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed62e577b7d2a6803ae4c2a941375bb79c2dcb49df9fcb5f81a29bccc82cc57. 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/GBPWR2300108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa597461bb0dee23d28c72d9906d6e503827d3ddd44e9faa1a8fdf0dc730669. 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/GBPWR2300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e4cd483a007ab6cb89d229bef4eafb440d2185f8191c886c4a72b2b2141e94. 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/GBAHS1400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7cae052ea8be0d06ae3a6e5f53dcad182ebec573b326bfcadd6cbe06814ddc6. 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/GBPWR2200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21879ac378536b069451d5de5760f70ece3b6453cb43bdc27af1c0ec97b5955d. 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/GBPWR2200048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc664bf1677f38e636a8178227dba5c21b57c2ba124fd22ffd19ad459d58d4aff. 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/GBCJY2200070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3b98cbd285bfa31a62ebfdbf216fded02430ca47b368fca96b750903ead558. 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/CA6D22200365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa597461bb0dee23d28c72d9906d6e503827d3ddd44e9faa1a8fdf0dc730669. 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/GBPWR2300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a9e23564da28a05524c1c09841d2ab250b59e2a199ad22a2068e5f7b7a0017. 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/GBPWR2200041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1378d06888fc71708ad98673509a07ceb9a5555eca9af400d4788c60bbe2f83d. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/GBPWR2000050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1378d06888fc71708ad98673509a07ceb9a5555eca9af400d4788c60bbe2f83d. 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/GBPWR2000050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73e81447b78202ed6d913546310908d64fe9ab0fafaa880c94f05b7959e96db. 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/GBVPL2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd40dfaa1b73cd88877ad1ec5b73bda33f6beaea82e8752940a8d12fa04202664. 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/GBKPL2099496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c687f0ffc65bfe3505b225e54331a971efd37ab3ff9d0226a925cb57104f31. 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/GBCJY2000617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38670644cef0a589c213ce8c9e3100bb9756639efe35a6f9d128d6d083924cfe. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US38Y2408682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb6ee0b17fa2758fc3d9ba92078a685efb652b02c5c5fbe72cdba803c2ac7c73. 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/GBPWR2400013.