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 0x49a483066b9a64c4a58f2784c5ae3227ebe601e93087a3717a7752ec487dfb51. 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/38353bdd-2f51-4584-8c6b-1c6823151169.json and https://artists.proofprofile.net/proofs/artist/38353bdd-2f51-4584-8c6b-1c6823151169.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 0x01437bfa42738744373869aa9adee8f54f35687b91d4f7208acfaa49b0df35f6. 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/FR92U1600480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc88fdb16fe07de475d959f31f10215cc07437a8b51efd60c6e5a95edbb8425. 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/FR92U1600490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2979c0fc4e2c4b956fcc66e70b613d5a55890adab51885898e42e6b28990bb31. 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/FR92U1600500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4a8176a3744b579c1ff0c53414fb576a06e57e83b5cc2d244a966ae91478f1. 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/FR92U1600510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9fda7682c9cffee53334f7d6374708a46c064ad80aced89ef6ae71c6804e0d5. 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/FR92U1600520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87b7e739588e6038655f69974230a84e753a5f66a239918a888b9ca2353a5a8. 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/FR92U1600530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02bd1dd01616ca14b951ac01d5b8d444047cff9b41692bf891005a4df3e4945f. 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/FR92U1600540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ac88d9d2aa135f758fa026a1393ea0ec8687e52cd764726bfd2b3a877336fd. 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/FR92U1600570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1785e56a5fbed1a6ea95a953d2bba000847b177a0157f8d6468cdf2b64b2d05. 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/FR92U1600580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ed3586df36db2840927a3c716be94e28531edfc976fdc9b6d0156f9420ffff. 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/FRPHC1900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d6905b03db334d2783c4fc068885fe208f2cfd0bca21f530ec21f24c853660. 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/FRPHC1900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a1ee154a94fef92a5d3505ec903158192322f1871118bd63990511a3d68c3cc. 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/FRPHC1900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e87eb8e5a89cfae5def365276203caa1af680032d47a84b935b938cf6b59d32. 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/FRPHC1900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x442e34e5a499b45fd4fc931ca1b922abc8ea3de63f5230cf955472191b9bc716. 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/FRPHC1900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d6905b03db334d2783c4fc068885fe208f2cfd0bca21f530ec21f24c853660. 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/FRPHC1900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a1ee154a94fef92a5d3505ec903158192322f1871118bd63990511a3d68c3cc. 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/FRPHC1900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf84a1fdcffd9cc439022811b5fd01bbf343733cae735f974e11936a097f94f. 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/FR92U1301170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64d77db5a73aa3c05f8768cd12f500db0db8c88f4aa7280e59f8196f1a35e55. 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/FR92U1301190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f011f1221040e4a1ad53530ae79256c4f95ea03332f41a71eecac977c5f8ff. 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/FR92U1301200.