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 0x6e33e49be8a63d2795ba630698752984de0c5f3d1c929cf050100259b2eaed6a. 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/bdef8f7f-b74f-4b9d-a4f8-a02e90ece558.json and https://artists.proofprofile.net/proofs/artist/bdef8f7f-b74f-4b9d-a4f8-a02e90ece558.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 0x23711cab33e0ab8ad9d7a18ac60d993f4197f97f026c24927eeae9b57716d5fc. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GX89G2309380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94aace20cb091527d3c688966050e3e598b6fa48fde498e9bfb1bc0bc2f8b70. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/GX89G2342191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca8a40d2b941b537c222902b88e8396ea536366b4763e8d7be5bfe427658bf5. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GX89G2339933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa264f706c787054f19cc072050bb1bb0cba6d750da376e4964164cd7da355b4a. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/GX89G2339381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c0ee6c4be20e8363c8c6abb1186c59d84a368b6909d79ca90bda70b3fc1ee8. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/GX89G2305684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf13f21089c047a8f9aedde46210ee13c96c6d103a78f1d4d567a16dfdca16cc. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GX89G2357556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934d63ede97d46c366d597a157d2d27944bb2055e520fb96c9833818281a2835. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/GBLLT2316172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff91984fb849b18ca1fa18cabe9af04a2c89f6fb7d9e48da6dff614400e383c. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/GBLLT2316173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c55bb5195083fd308d45506176349ac01f338cecdd74a0d41ad85253e917fa3. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/GBLLT2316179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8806903499e6606283d4879bc598d59a7624cc8de38c81560ff6d7adff242bd8. Chain 2 (Bitcoin): anchored in block 959003 (2026-07-21T11:57:43Z), 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/GBLLT2320479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef065648bb4bab7dc538e9b79c55253bce9cd01aa0ee87a9f082649aa9fe2e4. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/GBLLT2320481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84215477572d7294ba89210d84afbf264524124e0c94a981f7ce21f1f136d845. 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/GBLLT2320482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd98e354ae9ffd46bac7172c562666f4993dfbab71d3d9f5dad52710dc95c4549. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/GBLLT2325149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bba699e231122ec4f09ce6d7b22b34f64e91d87f57b625f8b1f5599ef8775d9. 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/GBLLT2328591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbecc7d19683314a1bd689c5dc4c655a7985256a982b3931e493ca98c6af1e60c. 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/GBLLT2328593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf661e9aa6afbb4c254c787deb4288f7cf9f797f0540876b2695aa54d54fc6ca9. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/GBLLT2328594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd14c209406b99513b3f2bf3e70cb2e349a7cd79cbc0956e2c9bdeceef1d27d7. 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/GX8LE2365241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c30bf6844fabc09ba5da9f00c1c0acd97c9b6f548e14c190065372e07abc3d9. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GX8LE2315934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d40d977d431e60957b8946805c351e317f9cfe28c1bb0415bf1406bdf5de1c. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/GX8LE2332152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec69ca8bb8ca3d21de68c2758210b9f8e28560b7b72ca041c83fb177bb2f06b. 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/GX38U2336745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0576752b2965d968e8bbf7ebceb94240b263f850d1b4c8684374c76e40fbf35. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/GX38U2362263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ece8d30b5c5357bcc175f2a154bb6837fc2788bc6b0d704b2b19a6b189c6c5. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/GX3HH2355256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd93a8414c54d7f5403b5b58c15516c0822e3ded83de872ff40228da066f784. 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/GX3HH2341387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7492a162049e9ddf3544b07700431d5a1c13e39822e21f6d6fcc64bdea722052. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GX3HH2333698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de414978c801fbff8fd1bfb54deb4f3bd038c840f75c2f213d27f9bc30702b8. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/GX3HH2381717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2dabc85c4465f40a6b40c5ca330c5439479045b58b795641a902e38afcc522e. 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/GX4R52383251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaef4f3e23984cfb9d102956afc5510e1a2a2a0d5b42b552a6107c0f1499d0ce. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/GX5MX2321574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb866af63305c826e4b06fac16e362b306431625cfedc53f3eda584b192a6cebc. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/GX5MX2319623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ae3f9f9a2b33858c0496bbaad8dfcf18bb96655ea66bd8aa4e09bc8498d347. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/AUGBT2331482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffac9795fc8e5d1320b15d0d4e4acd02892564458085d71da9b472f0387acf67. 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/AUGBT2331490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2082395b68d9d0f1c09bc5bd57747b1c1602f7671e736d189b40be21ca48aadf. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GX89G2442462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf4e189e759da6b5840b58d51cba977b09d587386735e9094bdbbd85f0c1bd8. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/GX89G2490834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ad8ec9ca91dbdb9799659419bd3cd33ae2eb8498aa94fb25d56c4d0d02ec27. 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/GX8KD2464381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232d140e21fc2d2734c2cc48094988e5395b59e8d8d9105f1f1957e6d0639159. 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/GX3HH2466556.