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 0xfb03bf8f1d85ab9c1b0e0a8ce20f70dcfb1975fdd40bd9c74032f0a40bb17e9a. 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/92c30305-3600-43d8-afd9-972f013f8dd7.json and https://artists.proofprofile.net/proofs/artist/92c30305-3600-43d8-afd9-972f013f8dd7.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 0x50a55367ed9570875bda5871aaea9c969d2b1a40818ef0aa35240fb4ae4552e8. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/ESA011718988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c4ee9ee083c07b1c7ffd48fb6ec95abba22ffa0f3e8fd811a4f89c615b34f9. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/ESA011718989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x591dd592204b08b51ef0518a6afc48ec61cbf4ca6391fe5554f484931c67a688. 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/ESA011718990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4044cfac7cbf42a0e027ab2715ae12db18fa3ee4f2a0003ca30362d1f394925e. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/ESA011718991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc369d0b34a699288019e4ac25d78f530995b1296bed301e9139609f0d508cc. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/ESA011718992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57389d96d01888010d6edf56fcec09d6b81630723a19ed25d97f4ce8b3e29c24. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/ESA011718993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e5d41ef476af7ef0db0b1eff0f25d96eb1ee199d5ef7ec1c923d3c3450e1f6. 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/ESA011718994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6f008f1280bd476d861a42665c18eaa17258d263a42c39748ba4423c746b9f. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/ESA011718995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa92676c28a1995f5a462583383eb81a4afb0c496813c599a870afde16c7912ef. 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/ESA011718996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742472687fa69c29eb55e367e8a0b4eab1573cd2e3dd2d3c6f1de752e6943817. 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/ESA011718997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f0ae10c0f72f54bb84af7339d6eee5a94640c9da9a07a972b491fa8ade5de5. 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/ESA011718998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x213bb1d2a52cc9af8196335f8e73281875cd31129099bd03101e8bd489d1deab. 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/ESA012120390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a9f595d6033b957328cd917ff4cfb102dc40a9fb279a0303969febc23085a73. 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/ESA012120392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6fbe0a5f748935503740de47585c3db0528b666844c463abadb9baf1fd0f31. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/ESA012120394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf149923eff5c1dcff4120cfdfd5028143a77d2b12e356e9031923c20eaadaef0. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ESA012120396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ead5bb3f992a6100043c4b8d0a0d844eab2dd66e607789a046a29f932582d61. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/ESA011919071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bcab4f9dc2de240a90b77f894773e0eeca41b9eca426307a9aca26b0028c155. 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/ESA092334045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08cf8803eb0cd5a6426e2fe085719f2285a8ff4eb5a83ffe789179f53475964b. 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/ESA092334046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde96a082ba238ef43abb43abeb3ee0308c4555fb4c8516043acca8c429c701b4. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/ESA011776553.