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 0xb85eb495a61b047045c45522ba811c7fa52bf38529cbd6707983e0b88616c279. 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/d5528896-4f7b-4a16-92d9-2bec3f92ac99.json and https://artists.proofprofile.net/proofs/artist/d5528896-4f7b-4a16-92d9-2bec3f92ac99.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 0x64af49562c3697620f6c0b4a0e7301bfd0b6e850a324736ea4fbc070ab414876. 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/TWCC32122767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f4b9acbedce62b52eda12c6b7341e5a55041dd68c586e46c5eaab36ae508637. 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/TWCC32122768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a830f98cffdb76b6c98c7f0b102110f5a898de4e3f5e51b66e54729d3bae46b. 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/TWCC32122769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38229a3fbca4ca5539ce1889ff09d9fbc71204edc3bc431becee1babe0c39bba. 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/TWCC32122770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17867dfeaee0a967a7f699ed95ea0bf347bd966f5f84667cb00b4ae12ef61d6c. 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/TWCC32122771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036ad5589979c15828b09d72f6b605c37fa26c7775a79e8d5e71c8d03f45f1ac. 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/TWCC32122772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd4def63592c32ec2f0ad6763e9299a7360a07eee463ff9c7bd5b27f857b697a. 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/TWCC32122773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad97885ff687c2705c8ffb45d9e91cc8e4cec6b40b2b171ada8a660fc545d4e. 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/TWCC32122774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe590280bd50065b67066979a3edde06e641244e02af5f04b2317170becb4d0f7. 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/TWCC32420350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07539c7e6021db17124dc9d81f1d36b4a4bd20182d03d389fd01d5fac0a8bd15. 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/TWCC32109511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x472df133fe731e1715339a58435725daa4547e8e5f33dd423e55b1fce695c59a. 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/TWCC32109512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14665e67e56882c532ba30565948520faf803940ce47bae3e61ba11003db65d9. 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/TWCC32109513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf15882b0d391bdae22bd34804076a0918d272ebcdb3d875f4ca58470526c8eb. 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/TWCC32109514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2fbb55a1febf19acac4583cf6173c1b3ff10ac6683103f95628c8b420da8f8c. 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/TWCC32109515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c3fa76cb7033fbfdf9c8875de7966b4558f912a55c1984d49e4da180e4712b. 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/TWCC32109516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99211b56328b509db2e65f623811eef55f698d7554ea7ca3a69657bf94bf0c92. 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/TWCC32109517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee86cb13f5cefef67fd4cea7d665aa53cb2efb51d32265eb9912fc3a0e0957f4. 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/TWCC32109518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40aab3434f25dc225e18bf9c2595f9ece1f13b4be114170dfe159d9fcb14b335. 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/TWCC32109519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb69c4ac31ef11a313efe42fe9de1938ebf8058374029c11a0e3fb1cd7910c535. 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/TWCC32108992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d028b8f8f7bd2fb676679e0a4ecc879153d3d8c749ea7b0e260271dcf4c8ab. 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/TWCC32108963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e1d0c29bf038d224183bf88bdc06007e34c0e9ecf73e843f99a3458676a6f4. 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/TWCC32108964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7c0064db6fd25dfcc0ebff2009a004428c56dd92a2f81e82f16857ebc16b0a. 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/TWCC32108965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x313c02b33ffc8dcf752b9760e69522d00ba178225ab1fbc55ce85fa730e582ad. 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/TWCC32108966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04be534cfa043880e66dbacccbb79038b4f042c829ec5889d747a1bd02f13229. 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/TWCC32108967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57445265886079761bc7bef42440200dac93ea395f43ea2c9a19269b924eecc2. 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/TWCC32108968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69354df1d9cf3e3ea431cf9815ce0d30ad76341f905d463c6e0e8f75a0b47b98. 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/TWCC32108969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079c68aacab2cd0a9e6caa2b1c620d196c2b7fcefe5a804d8781c7eafc5e9eff. 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/TWCC32108970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23766a7410b7f0e9e3ca5b05ca94b7bf40428f6a1bf57b042546eeac202b1194. 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/TWCC32108971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cfcd23c64dc549a32dabe964e16f50cc1acd2328d11ffc146b30601f38ee167. 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/TWCC32108623.
In the Quiet Fields, the Gentle Whisper of Flowing Water