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 0x536b55f18931e37280205b0b2ad3699f0ea2dbbd9a4848ba84a9b57facda03c6. Chain 2 (Bitcoin): anchored in block 954569 (2026-06-20T14:36:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b2c00787-cee6-4d0c-a223-80f2784e3f95.json and https://artists.proofprofile.net/proofs/artist/b2c00787-cee6-4d0c-a223-80f2784e3f95.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 0xe5ffecd2fdf8c9ac85b00a371a03f757d0c9cd1902c0706c6e89ccbd8ca06643. 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/QZWFV2537340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2303343be33a06bfc2eb48824be96d271f238a6315edb1cf60a153799620ee4a. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/QZWFV2573243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb9c5a6a903cff02460115e01c54be9144a207e5b78043b8e16fe54b07bfb94. 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/QZZ762573381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc783c4def34ec83ab88c290264a99768f05cf0bc1e1c7ed4aca06a053ba764. 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/QZZ7K2571481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee923eb16c0ece2b2ebea23788c79279eb5e3ffdad847ff5e68c32fe96f33b8. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZZ7Q2588799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670afbc315c5d3c875866910674c796abbd0f79775402f309a2fb5791d35132d. 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/QZZ7Q2585296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be39175dc9782d150fb63d650900015f6c103e5a9596a1c35a5f780a9e22fec. 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/QZZ7Q2585297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1f1f9889b52c1393c76797ad0e520fe6d76d99fa91d44df74156054074d05a. 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/QZZ7Q2585298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbabaaa50759336eb885a14ab60d0f21eb3ecab03e3646d5573decc4bbc5cbff. 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/QZZ7Q2585299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051bf38bab3d87c947017585dbd72c18bb2e769cb21862887795700cc6f10dfd. 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/QZZ7Q2585300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b6f6831c277bc2034e5fb0992480b8f78aa8410431788502be440faa8c61fa. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/QZZ7Q2585301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c4e803a058e3b22c7e836637c1ff447764832c468a9c35b1a7b16a72a19512. 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/QZZ7U2573370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62cb84f105657a207b71d26783178355652c2d1b66fbb561318c524b5523e47. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZZ7V2508252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa320b6b2137d3b703f68b747959dca90c54835ae2a8932277b07fe51e7d28601. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZZ7V2508253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4534a6707b220c38a8369220167705f21b5fb9cd599cacccd98daa62cd03e9a4. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZZ7V2508254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ec6b5a8012f07b9bc470df94f4e80e2d121e9fe6895190c99a267da238c64d. 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/QZZ7V2508255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf822c47ae3466f348d1444c3906d3f73c20b621d4fff2e6e95845b3cbee165ea. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZZ7V2508256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8de164afdd45b8e491d88ffab886ea5f969c89fbab995563464b695c539e81. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZZ7V2508257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55a36605348495dba627c1a80cd4bece16fcb0e1c3890e6064c00110cc9ae80. 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/QZZ7V2508258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb141c4b4806c30d6791864fb428e0a6047cfb240c00c6769930e99d3bbaa0539. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZZ7V2508259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb487e81edfaa2e4dc07286a4ce4463507434b67487942e9c6cfb304c11d93174. 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/QZZ7V2508260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5ea3a87133bec8f2b8e312c61bc2887c24643448bac5b34fc055ed43d1acdc. 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/QZZ7V2508261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd9899070d6123c919d2eae9f9a8949ea6ed99833df2df4e22cd239b084ee4ca. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZZ7V2508262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197e2bc96079afe681dc4779cc3cc9894abd67669f736367cf0745d8649287e0. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZZ7U2568136.