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 0x06d8751d1828dd968353b32077dd4d7f13c97542d395eafed9d846f1a9a8d9b5. 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/80e69437-3812-4c25-a9d6-23c7ea75894e.json and https://artists.proofprofile.net/proofs/artist/80e69437-3812-4c25-a9d6-23c7ea75894e.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 0xc507b9ab9514415d41bdcd78547b3d81d0238164a295317a783c3d3ae4af8b85. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/QZDA51845446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f38f1ceee58cb9cff33c7cdeea3e617e3b70891c896e4ec253cf67aded80c82. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZDA51845450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda84489b4ced0bc3bbeb9cd80eda3ffb68254ccba814acc6ca9898e9317319f. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZDA51845451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef6a56542250d2bad54fa99f939b4d3c13cb697a1f5ad4cf490c51e9105ae91. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QM2PV1877198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f29d17342d821b732b2ae2245f0771d7862b01b1df0611f68d46044b2f17047. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QM2PV1877200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9574746376e5636632f40450ddee80a7aab60b9f2f216944dece89ea7445e181. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QM2PV1877203.
The Silver Shields (Seleucid Empire Battle Music)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16eefb8ebd9e117af5a876da38ccf3a757228115b6e41c0e96e4be5f1d277fa4. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QZHN51923745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd96e3a5e58fe436c2734bfe465bdeb9aea31ef2f436c1280756c72c113ae02af. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZHN51923746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a5ffa480c020d690b649a198b000d808780f12abc6c6c0ac72a9a5921501de. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/QZHN51923747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0787e4a508555d0e3eadb03fda0b359a979dd453496d9cfac87537dcec0afde. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHN51923749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe39a2e9f00af94ff64630d4b1ce0713a6eaab381f20d5a269101cdc0498e8715. 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/QZHN51923751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x702bfb6f95e31a2a74d71e5d8851bf39d821692672792d1b703102618106ba8f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZHN51923754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9929357b116e4610b9278503ffa9bab0e8f20c0295ff20e85aa6065517f0e5b2. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZMEM2148839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c723b8566b164ce93232eea4474937726cbf87d9dac3b1321f3bc99ba398368. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZMEM2148840.