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 0xabaa2268cae2b05d46d7058c319f4858dde8fd52fd566acb1c3b9031aa5f98b9. 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/1ce8ffc9-e56f-4703-b824-76475d0a2603.json and https://artists.proofprofile.net/proofs/artist/1ce8ffc9-e56f-4703-b824-76475d0a2603.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 0x06552e816da47ba71427edf77d1b07d4ffc577a59e182f151111c14fce40dd62. 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/SEVSH0800906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4220c0a0ab2a2b329e03b644dcff69741317558faf97a0ee2c2cb3a45b0a7b9d. 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/SEVSH0800908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5a445c96283f210de33890232807ae5a60bafc82b4be632ed174bf2fb1fc13. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/SEVSH0800909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c0fd3f29879fc03b7543a2dc410cb0350f068a0c87bba4141b044dc19fcbc0. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/SEVSH0800910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc476ff47d33b1b398f9ed8cc282e2aadbceeb6857da822a3076a6a80cc0cc1. 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/SEVSH0800911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6480be3264540c338b0107ca5a377f2ff9c9b30cb420a951118651ca30cc4c64. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/SEVSH0800912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa932a333bf950771d69dd50d3af2432243605b1cc8641583e704eca469859420. 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/SEVSH0800913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa08678361e16a710cb572c2574bdd3502b4f5ac5c6601c7df665b9bd4b85b7a5. 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/SEVSH1200103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df9da4187018c272a688f368c66e18b0bcb827ae0e81c15b130768ecad5e6b4. 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/SEVSH1200108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedeb6ff91929ea8f682b03bac066e71e5732f2b201dbead45b55c8a48ded3879. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/SEVSH1200109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894a6b3f01faa406073f43b58f055879dbb719abdd7595785825f662092aff91. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/SEVSH1700101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ea45b36d8bbdf9dce0074c99f9a9b74fb6d139d72268006d1b07480605d8a1. 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/SEVSH1700102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43e809d10d7f15c03c8f394a8e203c4ff6ad65c383c54a769dc2b1a8778ca94. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/SEVSH1700108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebffb9f987256d549d72f054798256cf1c65c7704bace1a4cccc4c8a0036bf78. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/SEVSH1200105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe81d6138f8489ecf5b46e3221c6ec7a133492c222e1c2fc03beef02928eb6b9c. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/QZK6H2348592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c2689aa9928cb711747ca973ab724ddc42821df9191a72559782d5554f494b6. 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/SEVUV2401901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eb534d6d82755cec7cc11a2fba80565fcd0b55b1df5265abaf89390600a49b9. 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/SEVUV2500401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c2689aa9928cb711747ca973ab724ddc42821df9191a72559782d5554f494b6. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/SEVUV2401901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5afa86aa603cd8eeab82a77b567990ed4d08af766ee228ee8847e954a5da331. 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/SEVUV2500701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c009a30a4edc981b4836ed191da9134f2c2b846853dcd4b48f5555cdd96fe4e. 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/SEVUV2400301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb98207822c9f13c41e5c35578b49e7d0e587fd28efffe470f5c126f2176f01. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/SEVUV2501401.