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 0x046391e3143d2e7ca25d6ef5d8616a00acb95370e17318ee155fe34490279fba. 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/9f76352e-6505-447e-be83-f7fa807c916e.json and https://artists.proofprofile.net/proofs/artist/9f76352e-6505-447e-be83-f7fa807c916e.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 0x123d96ca9f111b511a77dcb4c3a02c77014b88021beb789d7c20f884208f985b. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/MXF368528065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293033bca63ebc7c8a09b6eacbd1d440f91799f69c7203f32144b0af782237e5. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/MXF368226941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537a557f591de60122f93032ca121fda6f78a0d150fde7c90b426830ac181406. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/MXF368628851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de5e59c7a1389b95975b7f997558896e7ad23f3af822e54b5c46aac86821ca2. 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/MXF368227172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba2fde5da79a4a0741f9622df1a5ce5c1d0a6da28addc4e39ca6d12bb422d2d. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/MXF368327488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e8849483a32011622ab058687c022cd6fa2900959245fb626ff1cc4b0bc63f. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/MXF368628846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ecc98f850aee36f0a1fe7dae192c7804ce6080efb72d2ff2b2c5e0bf0ac128. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/MXF368327491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48931f89f6e8df316cfeb92480c19ae085fc96a27e5f46e4028901dd6f6338eb. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/MXF368528067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02af1e86d58e542c763eaa02999e77897ffd79129c5fd10e8c649f5e1e90b346. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/MXF368327483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ad4ba743a801771db405c6122b1c53518d9c0bb3e519f8753c608bada246d4. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/MXF368327489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9bdabb7194f82cb90980220e86fe4ce33af5436aeee83be87981eda23b5e744. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/MXF368327446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f71688c7ef988961fe78b039b62d1523e3e84d82d36c9d131a4eb64dff9179e. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/MXUM70801915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea9a7f0059c38c47cbadf45aae696b1c22de515b8ddf92317e2b2ac1fae2895. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/MXUM70801947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac92c84d49de87d956a89bd1a81c50126f03251cb2cfd1c82418beaf7aab4f14. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/MXUM70900714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf802f992e404b3f0832fcab60bf0c55e07d32ca6a243302f5679428078bc41c4. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/MXF368628934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd1cadb33e96c1c8f98326aec759bf8bbc5627cf4a12eb6a21d2f08d6f027bb. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/MXF368327486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac21c23748f9550134bedd35b11ed5b74e0230fcdf9dcf17d2fc7ee3406a761. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/MXF368327484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f25ba3403b7e059797bc4924082c370c4aa2117e7311c794b913bd757bd0a1. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/MXF368327485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3eb1f15b74c1716aaf04f12cea9e0dd0b6df1c69e935c4fb9705d35ba00c890. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USC4R2333655.