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 0x6f2dec49b18f5b6b90c273da7d3934c8d991b0532a9633b55da48b136bec664a. 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/003e31ec-4501-4e04-83f2-50ff95a6dc0f.json and https://artists.proofprofile.net/proofs/artist/003e31ec-4501-4e04-83f2-50ff95a6dc0f.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 0x22dcf07fbe608fdd8b34003e4e900aca1173b719b71d0b152b9967f1cf0961eb. 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/UKACT2420274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784dc7f87bac78a54a5b9c028ac798d8a3bb5b1db93285670cf034cf5c7e065b. 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/GB2LD2410046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f28bc2b9145b1c86636963918ad82d67e4c5e78ed9fa2bc50fa0f3a0412c978. 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/GB8KE2320848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc40071310ef9b7e8b77bba51f429e934079824c4844d9b027245337b1a367f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NLCK42236889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403dd2c10740abadb6994af4554bcfa388ab22d6a3dff9a25eeb3a9fd615e6e9. 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/NLCK42236892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d6bc20d62ff98157e0810e88df50e84c99acdf2e3398b8df202599867ca5c1. 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/GB2LD2310119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a55746919fd5cf813751d19d65bf0053140e0192894ada210f7ccf762c688c. 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/GB2LD2310196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567fd4342022043116591f3b9453c4949e2f3a775b478f8d627702ff40a835e6. 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/GB2LD2310197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d6bc20d62ff98157e0810e88df50e84c99acdf2e3398b8df202599867ca5c1. 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/GB2LD2310119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x857eb9700ea83b27f7caafe2b6ed447f3ed7c5f00573da451758aa1063567ca2. 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/GB8KE2211157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadbb895614e54c909ce49a09950c7c01a9a714cac7319602fa6cea04dfb247a0. 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/UKACT2420267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50908dc5fa8a2086843968be0848e44ec0975f38fdc790cefb0203299bd03075. 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/UKACT2420268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x828dc42625e6bb0eac23844e0e6f03b78f898daf96cef5b92afb5342121202e4. 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/UKACT2420271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4df9a29cb91836facfc5627eb4a1d19707dd560851e2de45d469521da2bff8. 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/UKACT2420272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc92752b41c16da48aa4ff152bea1574f37610a8b93403a811a0bf5269657bb1. 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/UKACT2420273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22dcf07fbe608fdd8b34003e4e900aca1173b719b71d0b152b9967f1cf0961eb. 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/UKACT2420274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e3dac823d5ab0f74889d7757fb2fccddc6d51bdb6e9a728adc2a6bf121db68. 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/UKACT2420275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe298a077f483f9cc264e69ec98a50937637c521299260b80b8e48133a2a707. 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/UKACT2420276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ddf19547b4b8bccc9b685d575c0c9a051b2645bacf8480d409452594d38899. 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/DGA0P2306254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b121f08fe4b6f871264be34f3fa371c323b4a50090e4a001a6efbd291631e2. 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/UKACT2420277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e0752aa955677cddd2f39429bd17f5ce45b4f0741754779bea33d172b71aad. 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/DGA0M2335201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4133e7849791c366b3fdd40176a2cdb73f35314c66b559e2cc78badcfbe1fb20. 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/DGA0M2335203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc30a9f553b632fa31088f2b4f1892097ae4732065fface890fcc164856e2f34. 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/GB5KW2004188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd7d8edeaf5ff40f99f6161947081b637da52f87b6f85c10445d1ffb836b563. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:53:05Z), 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/DEUM71901667.