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 0x0c3127cd4e312c5b70c9c33c47fe6b211bee02b18551ae5cfd17fd0d60f5ff34. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/61b5ec99-6126-46a5-8f9d-ef94b83eab07.json and https://artists.proofprofile.net/proofs/artist/61b5ec99-6126-46a5-8f9d-ef94b83eab07.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 0x8190291f083c6371eb09067d669b6b434f5c48084047d33bf651052f3f0442bc. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QM4TW2186389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a598115205c1712d289117567e9254c8a509a279f5295290da9fc030e68c9f. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QM4TX2101423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f3cdae02b85351ad36d66d02542c40d98f8fe1e158965862daa26c2d5b8a78. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/QMBZ92283032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97efb3a270e5f1b7bcd58191017b08a78c53a2d90cf1c58641fd8478979098c9. 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/QMFMF2392591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8569836ea403b1d0b7f36063a0aad722ada5e8dffdacfe33c42fa89314ce40. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QMFMF2392592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01baa0d0e8daa8b93995b3dcbb4a8d6a779814c3130621009cfe462074bec136. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QMFMF2392593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478f6518692df6fdd9a7d2319f4e5ea8a1b0e2b9d1fbdc94dd75ceabb73e46ad. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QMFMF2392594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x165b24ee75b6eb42b5b30a8c61be9063b73e1dafbd133c153ef345724fc79bc4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QMFMF2392595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba3eeddcbacd4cc2403b01b39b04d5d5d8e608f654b2085b082be99d5b8df15f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QMFMF2392596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f9f2525fffca12e0e5e3a5f3aec9afaa9784161da767ce4f6f6607927ccc606. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QMFMF2392597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf5e946b35c71d40ec71412eac3c85667a7a643391c8a213b6a6a9c3438329c. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QMFMF2392598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a75878077dd77baaa372a1661bf9d1cfc2932a4dbd7a92fb54a187c23850a0. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/QMFMF2392599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd104710cc59f19a4b44cc7ddf9b6336636dd650707d503b9b7e0280ff9936b9c. 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/QMFMF2392600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2fb5fe515076a10393b403dd6e7b926a84843fd06cbd9a0bbe51ceab00e00f. 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/QMFMF2392601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d16d52e4c5bd06aada763621508fc1fc6948039e3c646f8acefb57dd346d09. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/QMFMF2392602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62911c4a1d015f178f54afc290f315f3cc8b55d90992f6fc5faa58e7ffb15a60. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QMFMF2392603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1086b0717657f4ab5c9cce964268c8fffb99bc96729e04a58882295bded7ea2d. 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/QMFMF2392604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754f348e80285892281727d9a595cefceab3e826f74adbb1549045cb9928ae8b. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QMFMF2392605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33944ff37a0715f0898f5053dac7b2d3539a2b84116741685330c85a6b20662. 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/QMFMF2392606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0815a3cdfb47753bd00a86494d98c92e18ba2fdbd841a1bd41eaabd157155fa7. 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/QMFMF2392608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5d8d3f7576d2a1bbbd2c279c03e4c1586678c546d58db3ff3489d52a195f8e. 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/QMFMF2392609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47cd96d502be00b9aa5f92a38ba616c64815ae0b4748bae69766949f83b245e2. 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/QMFMF2392610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0394919a164859917a763af08db1ac909a61ed31073db88cc24bc6960ca30ac. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QMFMF2392611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6f187dbc37cd99dabb6791666227e0dd4ed5c83abb7a8e32bcce9697cd96fc. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QMFMF2392612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b0cd7b0ca41360d07512fa5c001706211266f89f881166cef3e66ff3f1904cc. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QMFMF2392613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba540164c5fda1e5017140fa76a0e1370b1b671e14d7c716e0f20bad09412d4. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QMFMF2392614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2133eea6d631ce786958c85fe92b99619f936e1a060adb649bceef6917621b73. 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/QMFMF2392615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803310354c1af089692d0ba0f965554e74f6101da3a9d1c00270cc670c109b48. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QMFMF2392616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679807919303b5b0dd9fc9f1fe4dabc480898a923f2687bb6f810abd96840165. 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/QMFMF2392617.