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 0x1e5d61ac427bce04efc1c3febe5a7f5d717be29e5a286760b71199a26e9de4c1. 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/676af3c2-c6ea-4022-94e3-48aee7109297.json and https://artists.proofprofile.net/proofs/artist/676af3c2-c6ea-4022-94e3-48aee7109297.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 0x09d1cf4923d2e3e61d116567652fdeda752f492e2dede67e7626ccbab6de29d9. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/US22N1005602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5925be2d4e614d245c66a58ddfa8197a69418bf64ef29b2f80f31be1ca17e895. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/GBAL71201001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0dae27f77f9808cbaca38a6a07c3ddc1538f782b1545aaec0d737b01f8ea60e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBAL71303002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae8c487e7dc87c8d08e47e291fd93aaf4eef3290d039b5b319e8a5c70c4bf5a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/US22N1430103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363ae789be299885dbf78c883e6b6def5a8dc2ae4431b2d84a65996f2b73fb4c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/US22N1430105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa1f09366143f6c789c17c57d75e1e23f97cea16d93321ce8e09f3b2c1bdac5. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/US22N1430111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc217e678722cb33df08e9c1495a76a38ba9bee6e66f57d4c923517f65160e4. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/US22N1430102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae8c487e7dc87c8d08e47e291fd93aaf4eef3290d039b5b319e8a5c70c4bf5a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US22N1430103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef69df576e3ac2bbe561a379e82c7d6af451aa568094cc9537470467c4d2957a. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/US22N1430106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86a4fdb66625685b5614f7bb9e1bcb95cc17c5a66b850de86a685b9d6170053. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/US22N1430109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c441e42ae878590d478efb092fdc37fdfa263ff3be9433ec830e5094b8a4f43. 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/US22N1430110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e2b43f3d8bbadc99a62e74fffee6df0601b24955451dcbd73262c7b3f158cd1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM24S2007923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd753b35fb9fd1627c00bf8af373c42367f04752d3af6d637480609698e161a5. 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/DEG931691534.