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 0xa28131370ad251fe9d6f30cf6e90536a4c07ffd660a3d8911792e00b4b42c7cf. 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/49859577-bcd9-4c9f-9b66-9f647e42a8dc.json and https://artists.proofprofile.net/proofs/artist/49859577-bcd9-4c9f-9b66-9f647e42a8dc.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 0x748b75aa4f4edb42faf5b34d226ac91f9a52a5bf614536863207a4470af8fc8b. 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/QZNJX2424440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c1d51418d96971bdc91cd69214aaf963b84c061cc6d8f2a224a2b2a421c03e. 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/GX3Q92425579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba3599d416545243570cd2553dfc8f35145cac6a963687e0420f1e1f5f74704. 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/QZTPX2562879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d4c1fc42dff5ce275051741544bd87c4e13d9e316b8b81b4681694c94852503. 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/QZNJZ2419886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef5e0a58bd707d3c10e2f3d0456070089b3af000eb2a8a142cc3a2439278226e. 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/QZGLM2497973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8781c942d998ffc50c06713a5f8657b18a4a615d26689c928ee157121d853b3c. 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/GBMA22382167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fc47216b5a3ba311231f02497d819e8bbb02faf6046ee7a7fe138eedcf5775f. 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/GBMA22460610.
Xoriando en la Lleca y a Todas las Muñecas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488161f9eb74ce1540b1a4e68ea59eab26cf4c1fa0a0d38b6a88d96299be3034. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/UKXN22461856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dbcdcef610fb8a3d56833e6370d7f110c0536e2339016eb33a43b9ff0f41626. 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/UKXN22461854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf74af708f3cdfa9e610119736448f829a92d9ed85e9760f0c9ee5f5d69720b10. 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/UKXN22461855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf543b8c4adb9683c2c6fadaf55fa9feabc0a285f6f0696e2025134e85356844b. 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/UKXN22461857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0aeec4d5a5ea8f0a4a273d2b6ada8f8a49dfab0a57af962d8968cbd13c23557. 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/QZK6H2420110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x138404d41da55139ad3b1945498731282c826bf61343b06669e79e82e5a2507c. 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/QZNJV2438268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf903f5c111c4852bf5cf2e460b85b6dfb1afa37ad921e7a157088ab26b5e7270. 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/GX3Q92414269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd654b691d6146124b768712e2342a96d1f5e9292cd7331f32318810f151bec30. 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/GX3Q92414267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeccda285e1c2365a9fc136cb14c52f44a6f7836aa3ef1ad1e3dc3450b6f60c59. 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/GX3Q92414434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20acfaadcabd5ff03e3cc889569586e66e7b47c4b4644439a5cfe4a7ed99e49. 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/QZ5AB2407033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761196b11fec7ca295fd86b149dbc5249ff02c15330bbcb02651d90dbc88ff6b. 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/QZ5AB2406415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0abebee9a1f713cfd06b1df2d206b24721f5def219f43e9c13a5784aed1f5bae. 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/GBMA22345399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd0cd604b312fce92ba63ad912a2b2a17e07b66b2b6ae9603f603822f45f37c. 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/GBMA22345400.