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 0x28444500720b3b359a514e159644acdb101b5a8783c903f8896bef487578aed7. 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/627de483-56a3-4a13-8cdd-04175441baea.json and https://artists.proofprofile.net/proofs/artist/627de483-56a3-4a13-8cdd-04175441baea.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 0xd3840dd6fbd0908630065d0f8de979e8170d8e13addf8869a7c516503db3df48. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/BCHMR2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d47aae317ab35d9c11703013c3efb6dbb92cf9fc62f1716efc960356da013c0. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/BXKG22302699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47e74ce95c9bd010b53d6b3c37ff8ccc9ba1b369a7f696892df8098f119a3a2. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/BXKG22302700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4852fa1a593abdcb29b987cc8fd61c7a717932ab11b16ea125b8f0e0d2700b. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/BXKG22302701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63aa6f72f0647e166bcb2fe57a3335178003a130329273871f5058dc5932d958. Chain 2 (Bitcoin): anchored in block 960430 (2026-07-31T16:09:41Z), 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/BXKG22302702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb47ea7de2d57ad597e2d15ed4c2747fc190ed1d422b7d2328e3ee973aed0b4f9. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BXKG22302704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b68f528381fe4f86c396db69b26421226df1d8a0c45dc2fcea1509ccdefba80. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QZS652229264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf872663898d86b34f93a09eb3836aac5b528f3222074f9c4bd7858c44dbfd9b8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BXKG22302022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c44f3247b974d274a11f2503b82bd8ea16708359dacbbeb89d86b9c23b2cfb. 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/BC3PG2304916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0fc5ae9a8be5958ee82bb6377a4ce23897174786b289c002bab7101891dcf70. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/BC5R32300057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b298af7698b59270bdd5315145bc3f237d5d92239f8d078135052246c4370a. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZNJX2379821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b41fd60b3b14a24adfc87aa2c805aaed5185eba1b9f3bdc42240b0e82162c0. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZNJV2375078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d59c7095c4b3b74d5b25d493a9637d1e47e2334d2813bf8bedc3e679f5f49ae. 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/BXKG22301004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22994a010091d87893d92494304e65e5f7ec25915b2b1e2d61d123f8bea5978c. 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/BX08N2300121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0c3b9de553a77f14f015fb29035a771cdec7cf5e4af69f2d4452fef5817ea4. 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/BXKG22300568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ca2bb2e51d765095fe6a99eeca8b30289655f4d2bf35e21ce8bca68994bc12. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/BXKG22300563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4afe781dda32dfa8495422f75a0f65efe9fdcd991e649941f1bdd9383df573. 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/BXKG22300406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda43e70d8e55171f1855ba6ced07e0c5d1ddea2c75bfe5753689b0f3b04012c5. 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/BXKG22300199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b53a41b9876d5c02f38feb49e2543ae611c89b95bbdf7ce710d9932569c08a4. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/BXKG22300145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa2bdab121a235dce23978483e40eb8a86ecdbc9e02da74cd977962fa416778d. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/QZTPX2258925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3840dd6fbd0908630065d0f8de979e8170d8e13addf8869a7c516503db3df48. 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/BCHMR2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3840dd6fbd0908630065d0f8de979e8170d8e13addf8869a7c516503db3df48. 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/BCHMR2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa110184a244700311ad57cd6d54310be3fb51789a66f50a7bf07bf4ee5e15a82. 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/BCM112300077.