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 0x3f6cb38a32798fe5bdf028b27d42e6741c6ae1ac3b035be7594014d46e978530. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9159802e-4913-4195-9f2c-c21b01c4b369.json and https://artists.proofprofile.net/proofs/artist/9159802e-4913-4195-9f2c-c21b01c4b369.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 0x301ef8c99543db1a509bc52066ff75a9c2292211cbafb9c9439c3373fe7cd07e. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZHNA2232167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4eaeac7b5087f3e4632c97d8ef1b940feb506e5cc6ea931aea9b76228fd679. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZHNA2232171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c2b43a772082a9bb321ef9d39da66e9e5334f6fdccbb0d531125f6467943b3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHNA2232173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x191bf2115c33fe7cb1d9919854d3d199dcd5dfda5a938ba1ec4b8c38e9eca167. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QZHNA2232175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8237a7211d30c74088a0650d4dd6cf8afd512c86f859ae04e8c3e47ad9446e. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZHNA2232187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81b72d0b1cf30d292a1d958b2171af2807f4ab8fea9271f6dac168b5c3aefab. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHNA2232189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x129a853d955f4e156b462becbe30412e6bab4d9531770299f7edb0f740066ba2. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZHNA2217032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e8d79be5e9e4aec2990c8249eb4758745d96bb2246150bf49ef0d12af70a71. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZHNA2217036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d342a1973906578830aeb8691d243107fd54538988fca7850e66c57bf649ac. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZHNA2220895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa622fc0356786b29b581495e0cdfe73fba3138bde80a73659c233216a81c65bd. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHNA2220896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f5d2c1f8140ca60d9f1a01ed817da6b7006067183bc4ee5558319af6aa1dd6. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZHNA2220897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33fada9199d1c1ff6fd0e2d919df77c95fd2f52e2b508d3b1024aad4a04583df. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHNA2220898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa152d5051e5c16a5fd56a16847593adfcc315a5c151234928e057447490b69fc. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZHNA2220900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a658648b143ae44a80fc33d154754439caeb228b783f64d260739e26679b0b. 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/QZHNA2220901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485a5b5f5e7e6b437bb441343e816e77704aea88c635aa07a59854974a6040cd. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHNA2220902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b0c1e79d328373fdca967748134e4a3b559d0cbe911f5f794d61484b48d24b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHNA2220903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195f731ca2e6837dcf6f20e8ccc25c78d51c69ec746bed88a9cc46da24b798b8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHNA2220905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ccf618c74a6d898155680a5c34cbbcfa2f96fb6af22766adb060f6ff90b24f6. 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/QZHNA2220906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc698def30ebccc4d0992f88ed05ef32860dbe96229494b289b0bf4a7ff501e41. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHNA2220907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb493b87e9c0e3028990b7b6bec432e1f3328866932b99aecef46b9efb6ab50c1. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZHNA2220908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa805d27a7663efec71e39b3104e2c327c36579026a4667ffff641a58a409796e. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZHNA2220910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7280f093941bd796b52cba6f98a2b733820dc02a1c1853143643da6191fb2c. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/CH6541824653.