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 0xf1f238510292645619d190f97121757e34b51e1dd0404e247ff02f4199da26ad. 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/8e7b8f63-ee9e-435c-ba2f-0bf8525f66b1.json and https://artists.proofprofile.net/proofs/artist/8e7b8f63-ee9e-435c-ba2f-0bf8525f66b1.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 0xb376bc1dd495a6fab3d1824916d5fe5e895fb5fa91c57f63b666f5b434dedf85. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:04:30Z), 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/FR59R1951461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643fc13b1c235a8ed0d2de302e2821e4406b6b749f829de9b5b01b28b938a511. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T08:37:45Z), 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/FR96X1975192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ce92919310acd56883ebed5cd2fb052cc1cf728d53305e74ac380e7803e789. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/FRX281951679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43bfe227a4db7d26a585e97752ac84ecdd78a8f7d5e627d9d4e65004022eda88. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/DEUM72003093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9188d51fbda1ff8e6629ab291591f4ce5a52ad77228a8f60b8ac6b37b5dc5dc. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T11:23:35Z), 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/DEUM72005875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15fc1ff155479a35e6f8307db20b0324e74d18b924f8af1aab5989aa3796401f. 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/DEUM72100458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4115c906e61b99eb47c63e0c3fb3029d220a5d67c14b122f4ca8797741d1718d. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/CH7812218482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9150eed7cfa88dd4a1e675ed226503c026f595eb3c0eb66b259ad933fac9ebda. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/CH7812218891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87486473abb0663acb7ee30887b22ec7ffc07f6c34575652fb107e38db5001d3. 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/CH7812218890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea1663b3d5aef4a45d464400fa571513ecffcee9bd66c578888179bfea7e453. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/CH7812222225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9dad5aaa4218523fa1a5a1a2d2478aa4827112a433d67c435ee7c5f18e5a20. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:05:14Z), 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/CH7812220818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a815ac5036e0fbd3227caa4c7a9a305769ecc23892dda2c5ad6decedf4bebf. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/CH7812231262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca2f4ce0bc3c6e025fea9546c86bb70a1a83de0f476e845454ea9796b5d18cc. 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/CH7812233139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef7a280ea887b338b1fa500108f5240ae3bb0f73cbb6b5182bee5870da7958a. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/CH7812234874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f071a232f37b3e562df7bb1e5e849f91619f34f6e1e37ad6ac912adf97c72c0. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/CH7812238370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cba84cf43d333644efb2ba108df9e8fb2f85e20f878b303bae8fb75db4c184e. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/CH7812351469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bff39899e5ec3bb54baf103c2a07d53880c7a84efa8b2b36439d3970b5cdc39. 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/CH7812400512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f667aa1806a809a7d9fb57468f399f1b86c8568fcdd5b0711147e50fde7b052. 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/DECE72103452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x551c44403e968253f3ea07dbad09b3e28b7718da59ea3e0fd525509ca82603fc. 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/FRX202040807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd20c00e33687a72373eba5976c96c684e366c275cacca9484dabd99af42478f3. 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/CH7812236283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeefe81aee4085f2391c64135de20ec294cc19bff227e1dbfc2e1516817ab6718. 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/QZTBA2518464.