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 0xd94b7f10ce9b84abe0601eb8a8f4d7c71a05e82253e673c2b0ac343293b9b1e5. 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/67aa7171-059e-4b13-b2b3-9c40971ee62b.json and https://artists.proofprofile.net/proofs/artist/67aa7171-059e-4b13-b2b3-9c40971ee62b.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 0xc1df52c30f8ae6b591ef977453e14be5fd4991af5119a7bb6045c0d457807442. 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/GBXS51613205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84fe659c2e196c70cff943a5baa8e7a641efdb25c9301e3a0a270052f578b24a. 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/USQY51795671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9eaff7ca0fc138f71ae1ac368539768aa130df4bad9af32f46011a85fb2b3ae. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/USQY51795672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f3fab4d8f233d999e1000c6447536957e5b36103a5e3d888add731c6c613991. 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/USQY51795673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a856d5367cf42c03836eb09aa4244e3bf08e010fe580777d78475af61e70acc. 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/USQY51795674.
Vault Maintenance 700 CMC - Black Swan Dub
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b016d1870047942021b2bfefe1db23f667c73973a39c0ee6a81863501ec7ba3. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/USQY51795675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe62ed34299ca23d91d5c96b57792fed02fcb0526fa4b71803bfb9732f5a083b3. 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/USQY51795677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e3f9f95c42ff026e20b0af9d875047abf7a188549021aee6c880f2cac6ed878. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/USQY51795678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8541581f04fcfa295a30f67f80bb414ffb49cf442455fb546f163f15e2a94f1. 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/USQY51795679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb79f1cfc8b9d19f37b312109d286099f42ff46e0432bfee46506869cca54451. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/USQY51795680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3507adbe011f94f4cca0c419e4dcc49a40bd52fb0291ea237ab76a5d6694091. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/USQY51795681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ba0532451aaec70201b65a6e48c543653bbc92fed0bfdff744d211a9907ed7. 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/USQY51795682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b475caef8b48153e73aa0d4e6fd57275d380f2ef923f66cb6d4bda0734331c. 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/USQY51795683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea47de3c83e3045fd5c96da2d9711491d9d9739f4c72c1f8c61740c289818ad. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/USQY51795684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ef3bf0f746d527531cf947aba8bcab5b5e2a00d4d92246550bed7888436448. 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/USQY51795686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f6f8623b131567c243eca15a6033ef9d97ee5293b745dead0148bac17ba4ea. 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/USQY51795687.