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 0x8950e38796ffad562f6329f3f2695da74e731121d9830dcfd54522f5bd680852. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4e68cc50-b3b9-4e49-b4ec-f0bf7fbb1f12.json and https://artists.proofprofile.net/proofs/artist/4e68cc50-b3b9-4e49-b4ec-f0bf7fbb1f12.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 0xc1c3f80c5cdfb0a01f4c5bd0c132092033bb70a4037ecca40f1c9321f3b3995c. 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/QZNWX2580645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ad31a5359b6d5dada6412ed6e56f5f407e9f2db473e21207af6b7456797058. 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/QZNWX2580649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1684ba98badc41ef55085a4e2c19932bac09b21a6243f37a59a90724d84976df. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZNWY2541717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20411fcdbf8d48a8d3036c9c0e6ae0680451b8fbd2ab6c11b43566b162a53af5. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZNWY2541718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff14e9c84b8431c6d8681c602b6784d23e09df38bb38fda2b65481c72de84b4. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZNWY2541719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe02de249fa31086b33a0797967b186a4e36bc4c1d8b04dc3cb11af1ac1825e44. 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/QZNWY2541720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06846280fe1098a6764c1cf0a20ac4605765d796ef57f850f628fffd674e1fb. 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/QZNWY2541721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c850f9a6d93a0e18503539d56962a9ab0955bc93e25502fc5e1f0efd92c9a32. 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/QZNWY2541722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9540a53ee9921636aa7c4c286b57a40a59d84a2e9a611fe6c9cee9b761ae686d. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZNWY2541723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9996cfa5f68d5bfb9a59b53560f3a318f425af10de2e9ffdabd8280dbc1257c7. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZNWY2541724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ff1ab9e884ad5a4c4f7fdc3e7197d52654e80b85d06c05431b37f64461b11a. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/QZNWY2541725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7f457982889141a0fd85ad98a48e15b76eb9fa6969f637871925988358a504. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNWY2541726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654d66f9a03b1bb2af471ca480776d17f423e734a5cb1a4c8a29546a1616ab2e. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T00:05:41Z), 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/QZPLS2525214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7bb75a89d281d5185901b903b6014fe232cbb62ae90b3858c878b765eb5b740. 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/QZPLS2525216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa64779546c38e386cd8d44e4a22d5b87879875e65b29e68b600db0b537a34f9. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZPLS2525217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1684ba98badc41ef55085a4e2c19932bac09b21a6243f37a59a90724d84976df. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/QZNWY2541717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8defc27ee369009cb6ea7a1a4b6e05b8d2bcf7d4bb0d22cec166dba5b316d607. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QZPLS2525219.