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 0xc66c88b96d2793d7cfa991bd88e5b384b3b3367fe751e8fd1a3df5be0a519aea. 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/b9ccf446-189c-423e-a0bc-dd4cf530705f.json and https://artists.proofprofile.net/proofs/artist/b9ccf446-189c-423e-a0bc-dd4cf530705f.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 0xbc5f6abd2d35d1b3a74547ad775eca2194a38d053b921d5a3e83367cc8bdada3. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/BER571200066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4c53e763214720f528cb3ab1433d48018c86bb66fd5e1926250383158d2ce1. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:41:15Z), 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/BER571200067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89353e186897bbc80631ea86331b8c60771e84563911631a789b77905816ff6c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BER571200068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33704612f230315cae2f7f7869cc6c3c78edc3b853c25d6c6e9cfe5b28d0d15. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:16:10Z), 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/BER571200069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e61fd24a4834e4e97be6e15bb6225564c12e8e938648d23ad1f432231bea140. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/BER571200071.
Les Coulisses Suisses De La Guerre D'algérie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a848dee67650e14f38317518438853384274e1b76afd8924a60c70b5bb173d. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:52:50Z), 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/BER571400081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa31da73499cd738fd7080608f7547cc91ae472db2f24bb653f7787e3521e682b. 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/BER571400106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1af29fecb856b19dd09d790dcc5846d45052487fe5e96d8887838fa3c5ae169. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/BER571400110.
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 0xb331dda873468e86e64a0684f43480cb200102b171825b2f4465e4b5a868f228. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/BER571900126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf77f0a2ab6b0fc14c2b36c1df2bd57b640cd227d5bf565b6c421efdd966946. 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/BER572000136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a31e9c3bebf48f7d5902bfdf73a1fdb5c18b3cc489446a9673c8a966d1ca238. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/BER572000139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ce31dfb287d47c7e1436a73292f57607bcf4145bed9db3b6999c94629aae5e. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/BER572100150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43623bd398de98aa6e9d5fd8c23449204d7d3c638873ad8fbeebb1ed28ae61c4. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/BER572100155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc438892b220c52bcbe284fb3b0da784ac177910316e5d0263a792b90a93094ec. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T15:44:48Z), 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/BER572200160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a1b19cf3f3305d457432819551ad3658a048ffd0f23baa8a2b7d6200f73b6eb. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/BER572200159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x128f7b0ea595d665f02af1932b221eb27049b3b13d551ba1368017da4b5370c8. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:10:45Z), 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/BER572200172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1814816f3645b433cbb49b5cd10c33a5d9ff8e82bcf086f985681aa7a6b39f2c. 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/BER572200175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f88088fe32f2b8264e20e1760402c25c8d66bb48bd968755d2c04a1a18b3e98. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/BER572400207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcae516ddf263cddba049c85ed03fda2d71de3c1b185bb56d4b1fee967045f38. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/BER572400208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2770f39ac88a8d634bf9cf54e874b7b1831e57c1b59d1b9305a01c4e296c89f9. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QMDA62576617.