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 0xb0cd82e2045a7eac3ffaac3e28e46d7bdf206985010d97d6e8ff74f9d9e7fe7e. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/292f0f01-07a7-4fae-8d14-e511cc7c40d8.json and https://artists.proofprofile.net/proofs/artist/292f0f01-07a7-4fae-8d14-e511cc7c40d8.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 0xf203c6248565e725ad4586bf89fb3310bd326d3e6fb053e64bcb83c54a0e8b62. 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/DED811769200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca1af791334a17425f55245d3ca2ba20e4090c28d19ae8822ffcfc6d4ba2e62. 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/DED811769600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e548af9f22263bc0e13022041790be84f1d8c67db3d642ff3c11497b5321a70. 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/DED811769700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafeda558276e9b85e2efab6429150b51d32c43408545470f5f74c77d0692d7ca. 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/DED811770200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad0847c91aa027ee70f522dda72a9654a5f25c65b1d3c2e7067556b1ce2a0c1. 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/DED811770300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc92ba50526535353f1caa22287dc07c44040d88b864d4f9ff1326c8817affd4. 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/DED811770600.
D.714, Op. 167: Gesang der Geister über den Wassern
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf68a851a9972efcba52288fba27c0ce669613dec2847a3b3dfd1eb9086223504. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DED812360100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080d672aebc1822f2f3e50e8686dfff16dc41c96bc10870bd53a124919e402c2. 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/DED812360500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x140b781c14028987e6cd3f669699376f8a4f12788049925bcb7516fedae6031d. 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/DED812361000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4374457c57399c90756818b64af700e52973723c418a3b8a0ce6ffcf7c1b13b9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DED812361300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4675f3b7b06cd8287330e92e1868053b066f1656362f5ee1ab4220a0f705252. 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/DED811866400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7994915f8776be4a0649b5634be7389b51c41cf23156dd2e11ec52fea662c57e. 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/DED811967000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a94f06175a83c22466cbbd75740bf5c0389a9e6d6adafa9bac1a5f8d313077c. 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/DED811967800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac27b8bd89ded083a36a35c41667789ab5e043a1925cb8013dd8cdcb8e5d6a9. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:09:10Z), 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/DED811866300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x140b781c14028987e6cd3f669699376f8a4f12788049925bcb7516fedae6031d. 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/DED812361000.