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 0xd31073ed9b7309b564a3bcdefb623ac3d00964c4dc46aaec08c287833a217360. 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/38f4937f-07d8-44f4-9617-a65b44f871b0.json and https://artists.proofprofile.net/proofs/artist/38f4937f-07d8-44f4-9617-a65b44f871b0.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 0x5a65fbab422ba6974a3162253d6c44d4fdca2602480f3cf48b5812fa53e41234. 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/UKXN22441462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda55183b3505f2b1771cb17e2c0eac445a8e734d845f0eee41b82ab329fea12f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GX3Q92454821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a24ebb501ddc896c1ff4c9fcf6dfa1fff04d2e703271f13cd101c72bf9bb5fa. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBLFP2481344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced06a464a227de11aad32b7f82e03c780ef2a94941040ff650a10f97728df55. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBLFP2414055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe79648161038344d97c36d1d1faed65ef8522314d674140e6ef02e7e717c8ab9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBMA22320838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70754a1512aa8cd76e2df80ed1855f03a5b0983657c8ba048e2861696da4e32c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UKXN22365254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f9d266f5d0773fdd5d457052380cb9929a11c4a7eed959ff6a8aab40e79a6d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBLFP2371183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5ee96d1f8d68e6021ae583c5703aecb2dc53d87b3793a880f66e180925f011. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBLFP2389032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89df0edfb5859da2b6c49987459fddbeecaffe23b2af8873597c595ae58c51a0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBLFP2333822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d4f1269037ed089133e433ed7292c415afb6abc30b0a848031fd2f362e7da8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GX3Q92394518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c466261a695da991b207bf2dedc498773847912aaba1a1025045df25d7347c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GX3Q92380150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa879b703665e8394f2f0be34b02ddd78a5f19fc757eea54cd257cab3750f4ef4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GX3Q92347766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc41da6d2d22fc71a79ce653c1cc00a830e1371f959401356b08b18de719349a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GX3Q92325732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784e676651bcacaae1601066a5e1fd2270f532a8e81fe3b5f651bb8159525d2a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/UKXN22276468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835be0c151bff8a5034997341c5e04edd8cc42a368b2ced47c81916c812a34ef. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/UKXN22238141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8455178bb70475c3d36306af6c75ca787ef8d920a6f429e41a2c7e5b84c10df. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UKXN22218057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b6999df4e5c40ec03b7960634942d9d60110df8bcdc33541e16c7ec7b23c54. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBLFP2297286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0fd2c0e1c6e0981f8079a4442894d7c7791fdb4878eb8652a960a12d391e0cd. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ARIXB2104083.