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 0x80889e365d0be6472f57f2dfbc006d710280eb5c4c2549e34addd2dbfa1ef0ee. 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/d3c8545b-09d6-4af6-a323-b622a8b5bfeb.json and https://artists.proofprofile.net/proofs/artist/d3c8545b-09d6-4af6-a323-b622a8b5bfeb.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 0x33d238a28c9ca4f26c3b32b058f85b931559393938f3d5414e2a3fb8c1c52dea. 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/JP92N2344440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29f0dc273157965b5d7d1dc6d41ed16cca31ef0bebbb8fa6f4169490026d68c. 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/JP92N2344441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff27ea0d76a51aa1fd751e6c419437b457ecb882b539180e673b84c6bb2e7e6. 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/JP92N2344442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99ae84e5e05b07ac0369a4a8d3b9c9123da7be6989dbbd6568bc671ef67d4e4. 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/JP92N2344443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9516df585b6c66e441caaa472f1dbdfd35b1c300d8ab9d34fdddab35675d20fc. 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/JP92N2344444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c8a1a18d67b4f152f757304cf6df4493d57de1178855d52021526b1c85f580. 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/JP92N2338953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d126cd956f2439e9cdec740f1ab59d2326e3a42858700e904e089ff867d9946. 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/JP92N2344445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f56b19874e4baeec0268598b1bd61afe395c305660257c9cbda87c2aed6d5f. 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/JP92N2344446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8907c9e6ea7791a0822008a9c174cd412373ad3cfc41a1303b3244a84a349f8e. 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/JP92N2344447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b3d5247081aa851cbc90e4402fa506d85a8270711cec3f69ff4f6ced137b18. 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/JP92N2334212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ed961d75f40ff2e11ac7c3c5389dbed65a3d9470398c5c3c514e91fb04ffa6. 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/JP92N2344448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c2a6289ea295b5be6ee6b33a43b8476ed141dfe66a77e0c265afa20e16cba2. 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/JP92N2344449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde7ff881ee26c367853cfedb616089b252ce6362d4c33315c28c1c617df7e2d3. 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/JP92N2418302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e114ebfab7a037349de25805b35505105929ffbf5f4f16199b121682484e183. 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/JP92N2418303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97789973a4b65d3d185157fe942ccccae640fccd7be57e2324d5435f22df3b98. 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/JP92N2418304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c8a1a18d67b4f152f757304cf6df4493d57de1178855d52021526b1c85f580. 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/JP92N2338953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b3d5247081aa851cbc90e4402fa506d85a8270711cec3f69ff4f6ced137b18. 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/JP92N2334212.