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 0xabfaf02a53b9307f5a5aeb1dd2e0e27b4b341c4bd1acda639b11ce3f980e5b9c. 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/2246c70a-8607-4d87-8fb6-5f7ae6ff25f0.json and https://artists.proofprofile.net/proofs/artist/2246c70a-8607-4d87-8fb6-5f7ae6ff25f0.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 0x03ab195164987f3f0ac7d4f216a7f8c5c34e9fcd83629a62684181626de5db4f. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FRX762274918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd661a5fdf05e65a14142ed65307f5c653dee8b42b71e1475689595db3ea61b6b. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/FRX282212604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bbbe69771ea100845c9ed9a6087519af4aa872aee0da1b3f1b2b2a04cca2c44. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/FRX282264136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c03c52784cad524cb1d581df4e9bf2788e632b4c1f3628da7bcc5dcf598ea1. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/FRX282264139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64fe1be5a70de1e15d88a408121a4b9fbbce8aaac0ba25c76683fa56c0c11307. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/FRX762274911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe7479b1e35405f914d18f176efc5362b79febcf1f98ed210b901873cb3e0a22. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/FRX762274913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90fcb15d92c83b68866e61f6c3e700ee99a91ed8fb8b422476cd959758d6829. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/FRX762274912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c9ecdc08bab43e923f9e42af05b55204a4108307201432f5d6eaee09c79c9e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DGA082391955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4349ae4ec1c9e7dfb873648997bcaec216811db7fa5645e705e6fae2dff11cf. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DGA092351553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc411a4b504aa21ef4c1d78e4121539bb7bbadffed8a992695ed48c9b766c25d2. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DGA092376781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519686dc8eb0b87d25e6b0eafd735d59b886af1e88bcda65ef3fcb50eac2c099. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DGA0M2370287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e321037eb251ed3584c49eb432620ded7bd5500b709e2b30f36ce4924b0c17. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/DGA092445912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f20ae714413c74beb25fad32e575f2bad336472b9a788088c39bb1919ab550. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/FRX282507278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69550f785a6267972205605d96b930b84aabb911dc49e63e1b03c153b6ba68bf. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/DGA062532799.