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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716e67b2453902ad5f4ff5734d207e80121800ea82667bc3327bf3c352886aae. 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/1468deaf-d11b-4138-ae1b-7b45ee4293ea.json and https://artists.proofprofile.net/proofs/artist/1468deaf-d11b-4138-ae1b-7b45ee4293ea.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12abd44d948dedeac9ef24c2ac14c512050258e634793978c4f90d3bb8db16fb. 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/QZNWR2357765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c0f45034b501ec4526e7a93c3f3020b1e81315c258ad7608842a53589d479c. 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/QZHN82289941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06fd09339d4678f9414cae84dcc0c810ea5973999a9fbbc6c2f0de887db4cf9. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZNWV2159157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8db92785539feb2c61a7706a06e19f61a26f457a91d0ba44814beec50a9fb2c7. 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/QZDA82091256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1aa0196a9d3e69af4fbbaf6f7a30f8ef754032a60711bb14b299e4c763c8fd3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZCE61825707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01d6e1f6183a738850a74e4b5fd7a87333cb6b5b9aefdb40dadbccd0182a592. 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/QM4DW1737274.
Kodak (feat. KingSkurkOne, Moggger & Martin Hazy)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac9731f9f3bec1664f2e1194d3ee854647a00134ab014ac50f4574f21e8bd70. 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/NOHLX2236050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac9731f9f3bec1664f2e1194d3ee854647a00134ab014ac50f4574f21e8bd70. 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/NOHLX2236050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x839ea8aeb363aa93c6c9902741358de49c7d7ce2ef6a6dc162968a9139638ab6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMFMF2223921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fda612160032c921e9a7ed7e72a9d48196dafb512170a6c9a4763d061498ca8. 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/TCAFX2169937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0fa01c966e1dae7323a740ca656f55bac3959c604c3c1e686e387f781e1b8c8. 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/QZTAX2404181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b3cc59ac96fc5af9b8da02c58245eecd474a92b69924d453d4173160caa2423. 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/QZTAX2404183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb32495c396c6737a2c93aac5154f18dc0788da60cbce43d6e7b2a35b9a9a7a98. 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/QZTAX2404184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf43f64f6d439de41dfe2ce4b8478e44d4836e8ef161c0e2f376d51bdb9d9924. 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/QZTAX2404189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef14343069cec0e017dbad12554ba68777cfa07b764b0bcd4fa429af01dc06b. 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/NO44B2301080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fae775ce0b4e40dd730fb7a79b24b46e41f20c3ba4bb9ff414be0d1ed3c3b32. 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/QZMEQ2262567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fae775ce0b4e40dd730fb7a79b24b46e41f20c3ba4bb9ff414be0d1ed3c3b32. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZMEQ2262567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc0a843b38bac2b0c9c5f1cf40d75767158d4f73b79a56a6bc09bbdf8014037. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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/TCAFX2172889.
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 0x7f34a7e2c03c198f073539b737578208d4261084e5f3eb1c9c3c042c751daafa. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZTAX2404186.