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 0x27852eebed188031f8491306868d1b05664e41b98a27376ff5759273d8ef472e. Chain 2 (Bitcoin): anchored in block 953707 (2026-06-14T23:22:21Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7b6174bb-eab0-4e83-a946-c2f272131aea.json and https://artists.proofprofile.net/proofs/artist/7b6174bb-eab0-4e83-a946-c2f272131aea.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Notre Dame de Paris 2017 (Live au Palais des Congrès)
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 0x68e11c5a38ddae73bc8c1c4acd8fc8f3129d8b59e418354b39f90aee73540b46. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FR20F1600100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51bb070e851b601881595a1d8ee5ab2e035c407853ae8daf8bae89c585c3eb73. 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/FR20F1600110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4acd1f5784a921368a81bac3fc94aa3eb027934a5daf5375a671784a5d023cf2. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/FR20F1600120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a6e927a83360bd66c3d40ff434b3fe9cb1ccc13add4d6e1e16d2c99bbc4370. 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/FR20F1600210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaafd822770108374605c53150571f9e34748e2b8710d3436c4dec15e5930a5b7. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FR20F1600220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x272ae27b388427e987e6142204d637bea506910177c75f9b27607d6c56f5cbae. 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/FR20F1600290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x327b7d9f24a123303cd818821cf4d9ec7cd34584390d224e4a4a648c24d35927. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FR20F1600310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62faff094f5705b26f52bc195f1454967108cc434493142ac4734530f1e992a9. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/FR20F1600430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9cc250ca237bcadcb17b234339ade46cf49e81e44da7a78ff08bc0770576b25. 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/FR20F1600450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9135462a2afd713ace5dce74d5733702235b180a9998242dadc74b137daa94c8. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:03:59Z), 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/FR20F1600330.
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 0xed14e9396ba19d5b6362af65c4a27e7c9a2d4a4fc1e1693dd6cf9d333a78bac9. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/FR20F1600200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7930b741ae4b771aff15aa7d9ed2ed6126abd150707bb817fb6f7cdd3bd216a1. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/FR20F1600460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c0c2423e1cc2564b0425a31b6807626f860d89d8938448cf5eaab52c022874. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/FR20F1600500.