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 0xb82764cca082b9873f47a6da6323a37a20ac6e41e02c11d9cb3342a8eb3eb7d0. 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/e1e0f82b-8c8c-4c6b-94ad-9f5a47368c53.json and https://artists.proofprofile.net/proofs/artist/e1e0f82b-8c8c-4c6b-94ad-9f5a47368c53.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 0x09a99937ea78368ab31f8bb59672dc56203e6f4b8a10b214bfc58bb89e1c07a6. 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/FR59R1964139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x034350a775f3f72d40d3f57d09a9375448763841b26d254308d3012bf7e08345. 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/FR59R1964140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e62e90dd4060d1ffa9d9f3d257de2fabe6b52bffced7c0e3d4a3931d5fc92b1. 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/FR59R1964142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453dd244ed3bc0568bfaf3ea2cbb857748aeeb64f96169536dcf181b8481ba79. 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/FRX201981576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc46ce9623548be5045e8526e52c72343ef6b827f618344c44c59a03d777a6137. 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/FR59R1938372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3011ebecc2371905f6b9eddc849354979a409060d9a78ce692b01f7960584f80. 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/FR59R1938376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x888470a18c861dd35d277915e026daf919027921087d1ec0706a1a5ade369f19. 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/FR59R1937712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69630e2f29712a68dbca00b96fabccdbcd67dbbb831f8f40a0ce997a0544260d. 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/FR59R1937713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88987149b9f796f3d586e41fe9c19e4248d6f1292e49c408e728230d8f0339e. 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/FR59R1937714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e02ead575067211aaeb1057d2965b9d4c87508187279d13208173609594880. 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/FR59R1937715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28fe591a2214ca0abb4349cad0a66823f0b6b7b45eaaf79d2e04a3019e21b10c. 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/FR59R1937716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x872877ff28c4df644e75bc03ad977f76a4df20106e288f85de264734fc04aa37. 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/FR59R1937720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19bc179e4b65296f4a62057a7d3daa4ee98f71cd9b227c1cdf91015bb277e47e. 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/FR59R1937721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x073e50b1cfafb728fc7e42e1048825093f2468111fbef178e737c7c4f5d5378a. 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/FR59R1937723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65fa7ccac7ce83e7bb9d54a8489086b4301b55d40b2b88aa49953f4818513960. 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/FR59R1937724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa423c833da8cae3df99e6caa482aef47a206fe909caed98d1ccceee3b724e22f. 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/FR59R1937725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf49d09d19e5348f23a7a22d952773551cdd79354d82e9c8d3fd247469d16e5e. 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/FR59R2279771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb95d797d56831cb6d76f84f7ec51fb28e519fbaac3ec6a9e91d20780de5278bd. 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/FR96X1994519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb30ed26d11a1516f633e91c1b353e8c6a24caee5c9278573f6792b05dfbe3209. 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/FR96X1994518.