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 0x616146440265a80249dfdfd39274d93698bad0a876be67e382b65e6bd23adf5a. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c25e7cfe-c890-4403-a832-7c76e68c8682.json and https://artists.proofprofile.net/proofs/artist/c25e7cfe-c890-4403-a832-7c76e68c8682.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 0xdb187952ae83409a78213422080b40a7721a2bce5727cce4f01852a845e5ee84. 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/HUAHC1900015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b2bf1ffcbe82800c80744383a31932936a8c72a9a13becfc14ade53288bae0. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/HUD771700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ff2f93fd2cc97d8014f0e4362aca432c2a1e1d5a40799ca52a79ec3b839680. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/HUA612300129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be17b0842811f69d4e7e81ea2b3c48e74647d9a72e9032d8c8004f2e2bf9d25. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/HUA612300122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46ad0127c8713b956dd72bcc68758de951c86c2e9c219b2b2b9e2256de25577. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/HUA612300123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce3f478c04213b4cef7f585d18e9af5b3830931fbe5d8c547147316ea7a25a2. 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/HUA612300124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf43c00302902763ccee69b6e690d0a7ba788b303f50463cc22e5dbcc290f4efb. 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/HUA612300125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeca420572e860875898c89ee128704388f5e9d65e37a6a1520e86101eb242f3. 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/HUA612300127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5b33f1eced12bcbe1c5d0d73f6ebc53d1db0838d140123289c6037a058153d. 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/HUA612300130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f81ef07b11b584efbd014995e29494483e6dad28d457e4d994193b0e2a24d0. 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/HUUM70703469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0db852fd4739193fc444820468631fbbfdf517cfac5defe0aa7f05c55952440. 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/HUA801500061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ad078829d66c0a90713686af8e565bb24406e628621fd58dd5af6cc0bde266. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/HUA801500063.
Dalok, sztárok, történetek! (Pálinkás Gergely és Toldi Tamás szerzői albuma)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x991bcaede80c3e2d2ad569c5097c06a848d42f8dfdc3ae226efde92c48d31b39. 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/HUMAG2100242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c1ff3de8caf37cd7fb0f49d77834539cebd30c86249f3650efec9ea2da047b. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/HUMAG2100244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36b8edb7a75012bdd2b42924289597d2b617743cf96167bd9e57ffd44a1a639. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/HUMAG2100245.