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 0xd83fa1ab41baa44d72fa341517a45fa46b691921a8eac79bd32ed9620acb0712. 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/3a973610-571a-47f4-b51f-697621095b3a.json and https://artists.proofprofile.net/proofs/artist/3a973610-571a-47f4-b51f-697621095b3a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Baby Shark's Big Show! Fin-shaking Dance Songs
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 0xaf02eeca9d9ebc962af294c94bfd45d97a9c0e05cd177894cdb00c317d959762. 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/QM6P42348590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5924601c42d506d9541d238f03a3343678f18b487cae773f0aceaeaab7e8772. 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/QM6P42348591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7651930ad7da38fce2ad7818b6569934ae427bf17187f0db11fdc694947eba44. 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/QM6P42348592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b843ee30cf124fe589589fac077c7d8bbeabc106008dbf30c516526f97b6ac9. 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/QM6P42348593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b80e15cfc8cddd061e1e298b8a025b551ae8347e6ea550729da15b2aadc39b. 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/QM6P42348594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d36b7165208decb5096835bf03394bfb53632704f0273365972dc07e56ee53. 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/QM6P42348595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a4c04db2d435638e67af71e32f7cfe2884c9bfcae0d5c67b021945eb0693ab. 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/QM6P42348596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ac1f36d2111aff70abd6ff7aea47113dab11329af66e8e05cb0d81f6c2ba44. 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/QM6P42348597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad449717a31237607502361863b2a6df6fbeec50d2f09e304185fe216d35884d. 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/QM6P42348598.
Can You Smell It in the Air? It's Fishmas!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf43599d30daefd1605771297f79b16f792000b4abace4b0943f4ea9cd8928cc9. 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/QMFME2068256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d9e36973c44bfd869ea6b8c004266714f3d730d4886d068d195e4414b82606. 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/QMFME2068263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e8474cb1b2f5d9c0e71b549fa9ef47eafb68f8a4415f0892e009dcc8862ab2. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMFME2068264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd332455e77ca693e9e1e0ca5b5e29ca00bdcc605b7cb1b70b095f3b040c0f90b. 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/QMFME2068269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf43599d30daefd1605771297f79b16f792000b4abace4b0943f4ea9cd8928cc9. 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/QMFME2068256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf43599d30daefd1605771297f79b16f792000b4abace4b0943f4ea9cd8928cc9. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/QMFME2068256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d9e36973c44bfd869ea6b8c004266714f3d730d4886d068d195e4414b82606. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/QMFME2068263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ea1e0da09d1c4fa1453260c622f903a020b3a164a84712603213f019157c9f. 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/USN1R2207003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19556f96d8b03688cde7873e63c3891b9d66442b2295dae1d4870125b9c0e6c3. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/USN1R2207004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1677dcfb70a09e0ba967ca3d6e7230bd18d4e5ea91ce883dad6001624a7e665. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/USN1R2207005.