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 0x9926b103bdb8468839939a84345e6fc2b76ac091a4ece9564a9ebaf879846f72. 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/30f35ef6-ed25-4cf7-9bb2-4db85e4200dd.json and https://artists.proofprofile.net/proofs/artist/30f35ef6-ed25-4cf7-9bb2-4db85e4200dd.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 0x7f1935d0b146665a24dd86e7c5558cf74d93e59adb8ad0a10ca726a1380668ef. 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/CAGOO2425158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f52a8335f2613c34873a72cf36ad9b4bccf4ce3a87d419d48c6c30acd3beb5. 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/QM8DG2482827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47cfc67d93365e70917f045125d57cc918026e7182473db2edb8635f3bc9614. 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/QZWFM2463676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14120e7c6e9ffc07babb60354950dd7796825d11f8e4e00e1dfd2fb756418b4b. 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/QZMEP2484847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb97d838fb317cf8c5750f46094d44f9342e7c05fbc6dd0d58f9271c5e733cca. 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/NL3WT2300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d788cdf84e79d9230841be64f2769e4060770d5d802b1b9e3cc308e3cdaf043. 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/QZH5E2340420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3606a5e891a3d117e24315cf6bcae248d141ee31f859843c472561b9bc6af1c. 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/QZS672279842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e000b27d21f5894632fcb504594e507cae5a4292179cade88263b1a84182cd6. 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/QZS652391660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1341b3c744cb2335c7f28bcd3ee3e23924d02d46ea88c98763a3885a66115ee8. 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/GBKQU2422058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9caa62bcf4e494c2fd2a6a4b0ca613ab54a082581a622ca61bed98cc53c93a28. 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/QZS642343058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0195c8f79d6f2847d0434d2681d2fb9e960f7fe31d75176c02b01605f2a3b7. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZMHP2353272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7868296079dc4526310fb3d90d7a9ef667c8dd5113b8412287d4268d0c546f. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZFZ32392383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33e804559e72039ba46031c5bc877efdc7c7c5afb33155e931246f9af0d8446. 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/QZNWV2267813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc893543df5c594f3947f18b9bd8dd1c4b92bac0ac7b4211c5ca63ec1178f281c. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZMER2290000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x486487b9c70a0e7147300da8159dab4ee030c3b576f4ec023df9f02bb254e933. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZK6K2228023.
Rave In The Basement (Toocontrasted Remix)