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 0x194614a2acad31f7555124305d8cda09f479ee298cb1102b96bea304eb95cc29. Chain 2 (Bitcoin): anchored in block 953710 (2026-06-14T23:32:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7f710328-d878-4616-8b27-a7c9b524898a.json and https://artists.proofprofile.net/proofs/artist/7f710328-d878-4616-8b27-a7c9b524898a.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 0x62cbb454ca3fcd9c00c9461c2de7c0942898574b8f839ce79d1db463f4fab7db. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/ARG991040233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e00797e5a12787f18e428eccf2aa03823f092f1503c2740e17d9a50c9d2510. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/ARG991040292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d0b58f09af76b27acd3ea6d0917d783a35b2b489e10b864f0311ff0eeb79e2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ARG991041277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd973200dbae84e4dc397b70c8fa89c4ba43b203581ce1e2ca94592650cebd281. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ARG991041919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c68921b4bf38383f0b9ba9d553d9949e968d9f533daa6e9edcd860d9b9f11c7. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/ARG991042339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995c7e896af376db4bd5a7a9fa963dfbfe934b0511362bd8b018e3c85e9f3001. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/ARG991042429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63bb424d031acb5c595dbe3cd3967ea631b745d7dbd89cfbb5eafb9f9cf04b7d. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/ARG991042869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x246b4f2d689fecdec82149f4143c24c191c73cc7dbec66ccd817d81c12dcfe6f. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/ARG991042998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x182b51fee0e2b683461dc2a0b557611198f9fc3753f92aef046ba49372b6751a. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/ARG991043518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x069948aa88120bf94ddc7e916961b98f58faa279ab7a113d22a96fabadf4435f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ARG991043707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdacba43f1d1b056a78896a37a9be5983bb1eb256362b37530ae42d9d66986ddd. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/ARG991043983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc54d2b06b00837a04de97ea4ba87b1c167325ccd6888d778e2b119b341c94069. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ARG991044968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44dc2c4fc26e453ee839d06f2efc2d5ba2179d00efbda22977a25544702ea66. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ARG991046108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf769c7144ff7460855e772fae47c7ff6f1f25543f76bbd19ae595b0e1be74bf. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ARG991047194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39cc6e70ec7d41cae2ed2fe22924e48cac1347668191c6ad3625f4d17a3d0a9a. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/ARG991048206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61bee99da0b5e772d68a7e2d378ce73d683fe66a1cde898cf50ec7f3231cea78. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/ARG992044730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x349c6512f6e2e3bb235bbe58ce753260a35172ef4f8c5399285c6a7e3bc02230. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ARG992044815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e2b3eeb2dc4bbe234c49fd684bfed7629b89dd736aac1017b6cd43d441f811. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ARG992046151.