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 0x8ee1d6f236d9c09771d2ccdd0f4550a0621558ec4dd1f2f59a902ea45c89fa3e. 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/4c83c88f-7bb1-42a9-a05d-92c2e445446e.json and https://artists.proofprofile.net/proofs/artist/4c83c88f-7bb1-42a9-a05d-92c2e445446e.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 0xd20cf4714e4ab795fe444a76ca2b3544c8974069a4ae3364de0c105a0da443b9. 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/FR10S1596844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe118472c840b8d506cce6e35d7bbedbdc0fbea2a2ec8fb796efb442e456f43d. 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/FR10S1596845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a33fd346b044e574e26a9a97aa036975b1bffae52fbba5fd9273fb265b7af9. 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/FR10S1596846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e9661f5e90072d51d4ece3eb2d93923a13a916b3bb9da5d05f03e6858118e5c. 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/FR10S1596847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x968c39e313d4530a748e4843569ec04eef8aacd19a23229a181ed0f108bd783b. 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/FR10S1596848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5165b7479fc232729b5d7eb9d31878b6a445b3c4d24f6ccd8b2cf6679b4d41d9. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/FR10S1596849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb70d9d81d01cee7fbc45f8338b336eae48e973e54279e0c7b5aaf47879e32f0. 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/FR10S1596850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ae0cad25e44e4334a888e3d153eb3131ee57ef599da49cb5c21cc41bdebe92. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/FR10S1596851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf14b64fc3754b13ca28513b5d13029d461fd63b2b887caff43787461a2d1402b. 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/FR10S1596852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf24122064a9626adeb3bed60ce6b73e585e9915a3d63d4d38b9f8e51156acafa. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/INA331400341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e99917740139a86d95d1f0bf822e73902f4e4bea04326258a0a3ca6c407f3ec. 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/INA331400342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646226008b1c62d3bc7b92b963edf66b2a2799691e79d74e019d9897e95a9de0. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/INA331400343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeec9cf738b4c5392cf584f511b4d42f6562ee633fbe002a56151537d48d4daf. 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/INA331400344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc327b82687b662db429a0e50cd56715a23b1e8fac23edf43e5884507d381fc1. 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/INA331400345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262021088f5c9be7b471fa005bf8c6bfc9deb686c35bcb8467999ae05f240721. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/INA331400346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeacb8e19c6c126ce4616e3b16725bc28b7c345f72b5ee38995cbfcb3d6e9eb6. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/INA331400347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de886471f8b5b10a9cf0eafeb5e62363aa8c56efde955c5d6827cd2e441392d. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/INA331400348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8406eba6308af52d126ed9b378ec4f5bea06aba2bd5635b0b4d58c36ccbb1fd6. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/INA331400349.