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 0x21dac9d596facd87815eaf0788b7cda65d68338ac9ef4d975be03c2ee6656bf0. 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/18cd4bd5-8228-4c48-8430-9307d33a76af.json and https://artists.proofprofile.net/proofs/artist/18cd4bd5-8228-4c48-8430-9307d33a76af.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 0x62f8386fe8c84e58d6e458aa000c30b743a9c226c160552df0e7ae25a6a1069d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GB2LD2010108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dc461a1b90638feec7297f81aeef01af4ece68a50654c0f9e946f9968b5ec90. 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/GBKPL2141822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bbb65d9d23285d175b4af159f223388f8bba7d89a6f7416c909dba9dc050ed5. 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/GBENL2303736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93a182258e99e219cf28a1bc6724066cc9a94dc7b4d584a3f27fac98cd42620. 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/FRX872372440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa532257d5e499dc003708f747af44238e3288db0a093ba461c061d4d6a702b5f. 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/FRX872372441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ce6243346ac960fa612860bae58f8013899b9223ec2b64031fdec8e4f82b48. 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/FRX872372442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ddcc4fb960f21429d9245be8209011c818027659d663eedf708a3976d4ba9b. 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/US39N2302786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a90879046b7028abdf519034ff2bc82053b3674912d57e039efc1c355d05130. 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/US39N2302787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68919638cad5d2eba756622e70fe352a15f87a5d5140d5225b9dd92cb172fb73. 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/ZZOPM2236540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616bfa8cbed965920cda39e3edbfd09d6c833fa30fe2ac8e47b1a74a9d595d72. 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/BE5KW2400560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec1574740b0abdde65398e822db95b6be1cdf9f3204567acbd96af5e38623e9. 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/USZXT2353151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x464f45c4c33b6ba5c7ffb2c83d8f3f0a81cbe93bb4627d1097e014bcdf5330bd. 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/USA2P2356674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf443d8a5d6db52effba35049c9b12f0cd6bb92c01ab543ba0d670a12f20140f. 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/DEPX42300623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8935d327054613c146138eb6583714f205038c0f21115c37d8d712aa8fdb311. 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/USA2P2045622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5710c0df136d70df5e6031ccbaf9d86015c93524bb63cbf2f9bd32477307243b. 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/GB2LD2010138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd3c37b3dac8b0004bb6b515def403f3bee58a27b6c1a84176bb97c8328cf31. 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/GBKPL2006481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d8543c5fb43e6e9931e9312809f1cea3d1b1d3b3c01727ae56eec2ff32bf487. 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/GBKPL2089890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9609a7d96d6409562374ba892f741b0223c210701b221b54a7ced5fdc3d94a5f. 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/USA2P1956610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5248d9a7fa35552265eeeb6778c0d6ffeba199c8f207f78cd4b1089f1488147. 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/QZHN71908433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa35732a57da0caaf011735e111338bc080e0fa7cc8bae903cc4e8e17eabd3ac. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBKPL1971129.