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 0xa58d6db82991471273e1e3254077771f8c9fe509eb415de17cf7f8925fdc1ed7. 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/2a0adf52-776a-43bd-ada0-6944efb6b81a.json and https://artists.proofprofile.net/proofs/artist/2a0adf52-776a-43bd-ada0-6944efb6b81a.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 0x4b57afc793ffc042c910f80d42147e1333480d54761baeaec9f829e059505188. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/DEUV71900526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9d6ef8fa934b9afa7345b18a594ea2026c98ad48b0a472d13aab5370b69d0b. 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/DEUM72400423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ef86b48ca02a563567015157f2beda087ff4b8480221fab09f87132c2abda4. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:34:32Z), 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/DEUM72002438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9848f4527625d5375929c2b152c1ad56edefa333686c82c060705835626e760. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/DEUM72002437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7021c82def0d870ba508b553c009c3a4559504581ff6f351bd43bfd62b346e71. 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/DEUM72002440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48efe37a3ce01dc9dd5ee93172a7b773fc292880fae127487ee4bf661eb5affc. 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/DEUM72004974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x771af53698183d223fc9bb30af450f4a40b4d462cd65b2d4496c338b88d90c0d. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/DEUM72100036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61407c80d64b57309851c330f2f5afd9715710cf28244cbd644c30d435c63148. 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/DEUM72200449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7f4128d2deaad7e6873dbe0c660fbcf76932239763aeb2995ad979d15951a0. 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/DEUM72207041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8ff3a07927e3749bfe0668bdeb7ac37f84faab676b4298113bc51b11b06cc2. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DEUV72300160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x771af53698183d223fc9bb30af450f4a40b4d462cd65b2d4496c338b88d90c0d. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/DEUM72100036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0633385725ff7d1eaaf20be88ba25d571540113a79a349809be1bc6f62b8c7. 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/DEUM72006030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48efe37a3ce01dc9dd5ee93172a7b773fc292880fae127487ee4bf661eb5affc. 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/DEUM72004974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e8d4ed04eb06878f60782c2b1d29dc29d0556e392d12b5051fc551a8d74071. 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/DEUM72101032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48efe37a3ce01dc9dd5ee93172a7b773fc292880fae127487ee4bf661eb5affc. 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/DEUM72004974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd6b26ddbd70604a2483e756779017cc8fdf46ae1ae80d35793bfca49d93ca74. 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/DEUM72301241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83dbcd12a8d8d90c2fbabd1331c17080e25664118c9ae158a998131d5f65caa6. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:30:33Z), 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/DEUM72207798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b341dd93d763645d3853bd6f19df40222e1c814d817965a34184ab4a95e64c. 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/DEUM72119194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d7c12d3a652061a06e21a9b3d5b1b099d26f8d111f9a5791c88e4e1bddfce5c. 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/DEUM72002439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5811f18368c1fa39a5f70957104c28f45477e04c587e0148389ef4085f6ae1. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/DEUM72203215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d365d05dd3facf01ac0cd0bcb4ab3ccdb015b523ad7aba9184aa719e5422cf7. 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/DEUM72205877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd4afb2d7320133b34ca5a01ca9ea8e8b13d37670f4ca99d50094b4c1048876. 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/DEUM72303961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0984edad27be3c3e087c1bbe4cb6a616d977decb531118745f8b2b588227c2cb. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/DEUM72310073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb94011c3736e7f38d3b8291895496e8616fcade90bacc19b802ee15b988b15. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DEUM72311477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe64286d7c0c22d041b6ea6c6baf167f8c3f0023a868acc5c31293c1e4dc898be. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/DEUM72312213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x415fe945f9735c2f5af74fc7f3b3382e24dc2c32eed1c57b43d01c96612ffc82. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/DEUM72403607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b7780cc9550b49869331c9846b551db9245e56127a1a69058ea4e6d703db379. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/DEUM72406985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c97209954f2c0047515986b2422def240367136657f3d84b286d5c8a8be509. 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/DEUV72401304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec97ddadada602c05c0f9eae819325483cb65097379178f23c8e1b04224c1227. 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/DEUM72413463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa14dc01efbb435a3b14fffd0bf3d9f2bae074663be8d340363c35c100d485d68. 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/DEUM72500650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49537ab79550a355a3f2c3445bc2699a6cc3ee85be9c45cfbe5fbf91844a08fe. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:42:34Z), 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/DEUM72504875.