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 0x1b1ec15e5fa72376b8202b73c1b30b9317083e10ab3b96dc2c40658865d10331. 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/029eea0d-f6e1-4297-9998-1118dab4a9ab.json and https://artists.proofprofile.net/proofs/artist/029eea0d-f6e1-4297-9998-1118dab4a9ab.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 0x62476be437e6b4a4b95c7c68508bc9aa8fc49cce96e04dc64fb78b4897959b9f. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/UKCVA1801349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75fe02fd8ad7527d07f24312df053b2ebd7046d23e1d2a521049593a45e553dd. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/UKCVA1801350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd75f5022599f6092c206d5cc352d56bf642c6838efd557eccfac936e536d994d. Chain 2 (Bitcoin): anchored in block 958573 (2026-07-18T15:49:54Z), 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/UKCVA1801351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61c03427cbff417b459c7979deeba930197c2b08e8cd62f55ea976889cd2988. 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/UKCVA1801352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3ad96cb0eccbab04edb33c8ef92364f9e024ca1b4b628862406c6961d5759b. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/UKCVA1801353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc186d98139e590243cf9432b7ac96bf3f7f780db95edc585b24f54bc204176ad. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/UKCVA1801355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b0407ca84de1d34123c005aa048720bf917d6b127241c258a8d378ce1db1c36. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/UKCVA1801356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a1882b9b0fe84b8799b817de4ea092ca1c7bf6ab311b6013196bcbc53d46fb. 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/DEAR41781455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7249028bdde778c546615e86162a915b70ef679e309775cc9f180ca5037feb. 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/DEAR41752199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b94d68160313847dd7fde04dd80ab559d47dc6ec1a3b7fbbecb8ac0e9990cc. 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/DEAR41752299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2cba1800e6de9cf974867c1637fb255de338f5621adaa5ae0a5641d60feadab. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/DEAR41729049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0833a180a3e26dfb8c57f7967feff95c1b8e73470fac483be3e846dcd90b542. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/DEAR41725711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x771c95e74fa2ce9ed7806ee96ffca3f7ed26b9a43cb72918b6e8c942d0abd81a. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/DEAR41770757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x702d7bb8db0d4776fe9442cf30b14f0d0ad5a47b740b4f7c76d08db2d68ac53d. 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/DEAR41741935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9733b6aefbcce3ec216c651f047a70b0338e5cfbb6f7d088730c7294ed001cf. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/DEAR41776018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aaf06c4b4fcda91a629668f636a6c865b3f32dae5b3cdd84f43a50f876f40c2. 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/DEAR41757083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10c3ba9b8edfc0f69a9d8305a052878ac73e1f7b3f4e571a51835f01939aa69. 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/DEAR41786168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4446e5f6893059d7bf1eb55e85c490321075db8a20b24496614682749d076c. 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/DEAR41794951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ffad8313391898d76e2d14c4d17b27b71076ac8464c6e3854222ad4e4b7c5dc. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/DEAR41752072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad95c771e43f5275a11b54686011ee24d1b8e975a7f1df1aa7c685fda90bc72a. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/DEAR41786189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc71f7da8ecfa538724423ad724721d46a8b98ebe21fbd9e911d646e078c79a. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/DEAR41718283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2fe4896475e4f7ea2221d24381c39add9f3711d706d19de6dc72370a5a6fb7. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/ESA012084197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823632a288c4d32e385c4fedfe3297feb713e24068a0dc879882d95912b854df. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/ESA012084199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2324e3ecf7d7329a4e26b4253a955fbe8d886ad8bad228951978e5de08319326. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/ESA011522186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351c4d28e8e2b28eafb52251fb3f947ce38c85a870117a68688a0676b3c96c3f. 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/ESA011522187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25df5d4e50c3418e143d09062bad84c6b9894aa6a067eb8e780e9ee120036d1. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/ESA011522188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e77ae7a2bc79462f99efbffb9ac4d43db4d4ab6eb645fbe8dc94830d9be813. 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/ESA011522189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2532e8fe24795b5565987aecbe9e8faf51222d9bd21fb6b284a7b368aac7495a. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/ESA011522190.