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 0xc649d254be33e7d261a20fbcba33d81f08fe49d879f03f89ebe058001eedabcd. 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/2dd24693-1450-427f-9b56-9bdbe7710f77.json and https://artists.proofprofile.net/proofs/artist/2dd24693-1450-427f-9b56-9bdbe7710f77.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 0x84759aded262d753d9a8d2cd51d69f7c2d86b03cd8d48d4d7ef34ef6bee3ec2e. 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/DEA550715436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62353e0611c5f769ea5458e3a147b36ffa27710b0c457a24f1925bb0a6ea44f4. 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/DEA550715440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ae0dcc819adce806f42bc23dcfed5bb547173f8e4e8fa91fcc3feb71c4e358. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/DEA550715441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ea407af55fc652e4f871c4e8ee35634e76ac0fdf7323c21b87fdf0416f362b. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/DEA550715443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5364a89f758695e884b9f80660b98cdeee0f337f877b7c47dc0cfc69ed6e8de2. 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/DEA550715444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4583a8fce767a11984d5e26f6efe0b28e7c5c62a54ab973a3f8bc0fba7823dfb. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/DEA550715445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd0885d4e43d17329b18b18b40a9179e2b5193603b2c01775c4a51c838753ff. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DEA551230084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22715e42ca2095550859431080f00f1855252e68f20d47a86eaf219a5b55d5a5. 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/DEAF41070005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff4c31c209e92034514b6eca48835e225d1413760aa18c292e5490e2158acb3d. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DEAF41100075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa78f215655cfafcd5b88e9000fe6fcdafe97d0df187dbdb77d13d620a73d5b59. 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/DEA550513907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8daee195e444d26c046182f0009c2534105368e5c70321922c488d4bdb9b8ea7. 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/DEA551230090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb567fc67eaf77e5dd15a70f6e20f8a7ba7514e523cc061977fd6f34f9b22a0. 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/DEAF41270073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e3046cfec55586aa33f6a9b7dcc0e11246486e75cfb93ce8f93cfdf1b3545ef. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/DEAF41270074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a6eca9176b7e90ac00194eb1ac00c1e3246d5f2c6a6cb15bcd439a836178453. 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/DEAF41270075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8b57252ccde235c12d7b5c452b5e506a83c3fef933120232f7df86edc4b6cd. 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/DEAF42100474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8b57252ccde235c12d7b5c452b5e506a83c3fef933120232f7df86edc4b6cd. 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/DEAF42100474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28166fb3928efd11021674b4c0dc1a61012db55534c9e99af5afe4dd050d80bf. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/DEAF42100475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdacfe57b981702eb4fb88ce544e99ba7c0ec3fb3d50f802c1f57a8065518d811. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEAF42100478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd0885d4e43d17329b18b18b40a9179e2b5193603b2c01775c4a51c838753ff. 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/DEA551230084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8daee195e444d26c046182f0009c2534105368e5c70321922c488d4bdb9b8ea7. 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/DEA551230090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc665b5383b19a29822691901a0905e7be36f84dcb381709eb51cf1353830eeb1. 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/DEA551230091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4687b9689535573c71a0bca7feb4a21070534ea1c48c16c82299f23a396d1bb8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEA551433542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd3026670bd1bf6f607ddf80efdedae79566c796aea80fd8c672dd2e8555b0a. 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/DEA551433545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b4d51f4f9351dcfb7dc13284c28e01fa2a964ef1a3c3ea7c868142d2061f7f. 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/DEA551433547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7012e7235ac451e31d77690a28fb0fde91ab3cfe10867ebb40b5a5f219f9772b. 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/DEA551634775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa04c1e2fb2cb59d7ce84c72684c7c5fedccd2b73c14a82b5c91b38a59dc970ed. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/DEAF40900449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4924ed96259028fb51afbbb815bcc3041d3419f6fd8d48cfd4056eec54440190. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/DEAF40900453.