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 0x0f6471720caf4b6ac89b61b5b7e3d160e773cf33794e7307a307d5713fa7e350. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/92eb78c0-5ef4-4363-a1ac-85598a7089f1.json and https://artists.proofprofile.net/proofs/artist/92eb78c0-5ef4-4363-a1ac-85598a7089f1.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 0x4b7efb550bc73568dbacdd01f0c3ad1964d744b1d55aa527e6ffc7344f52b49a. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/GX8LE2428637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30fb4a5dd816eeb62e65d1222e22c712cd078de2e1c83a6a55628d5f59833406. 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/GX3HH2400104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdaa1e2a6b208a3cb64cc495516dda6b14f171d5e36cb577287e182bb970d834. 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/GX3HH2467774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e65a036dbea12bba12d58474dbde4800338dd86c6f960ec9660d264f30afa0. 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/GX4R52443907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8659f00e09cc27d12d1994f23a90a165dbce008e6dcd83d2a178b771978d11. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/GXBDS2403339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3143aa7efe10d4afb8ac5ed6afea14b9166898aa4697b951e27c2aa6430c9efd. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/GXBDS2442964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3961d058c3007b07af22499cd448e966f5b240eae47a870a0c5ea55a56404b01. 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/GXESV2499286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffaf1203f57c56e029cb3a1ad599a26570116eac20ee5b5c0ae6c3f020bc5678. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/GXESV2473426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda55934ac2f16be62fb4c57cb05a9694e72b2b3e3ee72e6e879438861a7605b6. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/GX38U2517258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63a83a519ef4ef42635bbca46c33d7e94b3197c141103e7fb4617ee6594834c. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/GX38U2599484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcadd05454403d5a465bca56930d5ca291f5e2942de626bfe5b5812cc4bf82b57. 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/GX38U2586212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79815c67dfcc974b09305d11b2f907d837c49753b3d58bcc9adaa4e4d55ba5f2. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/GX38U2579901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdce9c7336f4a805b699b75baeac9a6659c92ca1166e782f9d5b0a21fb799bb5. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/GX38U2556710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786b847d76f3f2e1725637e8ce8cd190788b49030d37f4fd120d3794186d96b3. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/GX38U2546479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e181c8cb249005eeaf623e20bc9670b213611a217a56cc1fb8fd2ef92d5d41d. 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/GX38U2565516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2319e42941fb455ae17c411d9c214ae26d575542a3aea4a16faaa141da02d7. 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/GX38U2597457.