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 0x20dcd5c0f0b704dd1b066252f245c6329f21deb7602743e81c7d20c8f0dcc19c. 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/5909e8fc-1d88-4ce6-b78e-798f3e3813b9.json and https://artists.proofprofile.net/proofs/artist/5909e8fc-1d88-4ce6-b78e-798f3e3813b9.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 0xf9f7eeeee978b0f0e44a184c5b117e5ea101426d925a94fe56b99bffd286a7bf. 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/UK43Q2010823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb4a850410fa38966be4f4602b78ae22ff7b3d2be6a21216f59b5edb0249cb63. 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/UK43Q2112534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02be258cdc31f2508a17a1d174f15d2f677dacb57d314836c2e0f4ebc5d918d3. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/UK43Q2112537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ed1f2e6bbab6ff62b476cecfbb75af572ebb28da3ea17c689d4600a13d32c3. 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/NGA5T2212321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ebeeb4ce86fed9eedf9d314f2e8395cc89e1dae22b1f2ad7fc7c309f5459f2. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/NGA5T2212385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa51d02d42d0b3440fc03fb214624a6b761f48f62837c043e3e134a5143261f28. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/QZS7J2278390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9aefeb23f554d847b8b4320343a38be89af9cd21782c294d337cd5485fbdc6. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/NGA5T2212567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18310bde9fd11c987c34a54f84d1f5c9a7271e1bf30373e51fc0439c70126288. 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/NGA5T2212568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3810b63aefbee5b2e68f0256999d5903030dbb276b46fafbb99f0af929eaa0a3. 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/QZQAY2344408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fde4f3477fb776da94a8dc98bb0d195eabc667943be26948bd7ebce7e482e5e. 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/QZQAY2390620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43dd3102014a69d63adb5940dfb0db00393da7d7b632dcbd4b7f09133c46fa7b. 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/QZSYP2352492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e4cf7e8180ab080ac0940f8611c6f01835cc99e37d564e493b6fbc592d7506. 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/QZS7J2363381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb65f899ded5ff8f6a56cc52fc67c3a62af36db0798298d1583614e093fad4f17. 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/QZS7J2338602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1754ff4f765b006865753c20246fab7705d1e3da73d28e8c64afc3b319c1f68. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QZS7J2311465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce3710410e0954efc0f7c5f0890a33310198288b16cde9323b317fe3ba3f1d36. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/QZS7J2393436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40eb9de2db08ef388363290f8c79c5d0d571e3c4e09bbb7d99f6f2302aa3e19. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZSYP2342573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273abaee5a09d48a2149f1b09b292ac26408a001d8fce3b101a8a6fb29af2755. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/QZS7J2344430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe11c5261ee049bf99a3356359a9e59b960707987a2f4b7b6c4a3b0603cfcaa79. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZS7J2374192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad315fc44704b407f9dd0207780952a73cbcac29427f6639f1bda8e840c25b7. 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/QZS7J2389198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e802cd1682e3c8265ea94e7db24f9ab89a2107872204df723d4be51b7fa963. 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/QZS7J2379679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8593ad29fdcca73c693c5f6d014a63bac9da9b0e57196002af17f5096433a63. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZS7J2316028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce1b0e5c9a2afd2b99d672e91a3ba4ec83e46aa79b4bfdf3215b7162a350366. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZS7J2384713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85db421947bc195843db67a746c4453b27292c0eef10c458547f71d30b5584a3. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZS7J2335710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aec2348b0af641234fdb221d66ba95457b142a07d4717249f6fd542d6d70a10. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZS7J2327666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1df8ecd58f7a5cd3c3d8ad63f2e6225c71447eea3445f55060f7fbe8b9878255. 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/QZS7J2302885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae073a97cfdb954fbde144f5f6d82b2397427792d7b3511f4ea62f40bd101f3e. 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/QZTLA2414181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e2e51f7dff1fb07a74e71edb99af827c66855ee9338696abb29eca84232a53. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZS7J2416469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9343d295a0ed5ed6b0169dcd765cce8f96414913b2035feb2bdee7c4ef8952ce. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/QZS7J2411434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eddc49397dedac592d1a674b672c818a5ff34d763bbeceb3af7c13bc001b0fa. 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/QZS7J2428020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298883649ac10784a27108e1e385b71204ba894fb91cafa780dbf0020394d9b4. 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/QZSYP2475723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e205327a83153f123f40b4dc41afe94e2eb48203d0ff5eddd8987c0e73b5b2. 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/QZSYP2489797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe56f7966d8e8025dfbade0f971162621de2d235e5f71ef314b532ec99b6b5beb. 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/USUYG1224011.