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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196f132da52b8d048709e287519e7de6b39558d667e806edf27cd5275d493ccf. 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/1b75bd80-993d-4531-aa92-ea41c903ebf6.json and https://artists.proofprofile.net/proofs/artist/1b75bd80-993d-4531-aa92-ea41c903ebf6.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed0a0b6b12b329823d8041111403faddfa97dd1e2c58fb4290640d6e2b56ef6. 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/PLH342500026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52f9af0e35dd8031495fd3a0ed829a8e6584b5e986a7cccf2c65e40b55c65b0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PLH342300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815f16c70aadca4ab6ac76a9a69ec9560892e92fada18de94159b2a18a10b6de. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/PLUM72000200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb47a3a0174c499d35e41bdbe218c2d6e091a1ee4471419a0e54daa93b38b3e3e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PL2DY2400705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f2ef7c7fc4f489b609dbc949a7a93a23cbeddf43c73836c38fab8c31d1b473. 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/PLV402101138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cec59cfa51d4722ee6cbd25ecca9e34a2431611f51aa05a4bf91ab9015d7710. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PLV402101161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf49542576c8cb5174ddae650e70dcd353c94e6489aca221c49357626a4b26503. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/PLF242209813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b64efa3de0191f835af8f3c6e51a190e3058388c98b8ad445fe89be6883090. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PL70D2300293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf49542576c8cb5174ddae650e70dcd353c94e6489aca221c49357626a4b26503. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/PLF242209813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6985bed290d7e096c77aff36a1775242698755c3fa835785fa98cc406d7c6ea0. 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/PL59G2300356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42ae14818b0bb746f8e19f85adb547d57ffa9389291404b3e650f6fc258397c. 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/PL59G2400419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42ae14818b0bb746f8e19f85adb547d57ffa9389291404b3e650f6fc258397c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PL59G2400419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc1793eee6a582b5c16cb800a499c946f1cf10097a690d0a860ce416af8a539. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PL31T2405205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5715596bf721da9f0249a64ddac7da5f3b342f7121527ef6eb4915c902658d4c. 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/PLC062368694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815f16c70aadca4ab6ac76a9a69ec9560892e92fada18de94159b2a18a10b6de. 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/PLUM72000200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0067746d879d999a833d0c36af6ce8ea3fecaa94f3041bb792e5e4140760c661. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/PLB382400449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0067746d879d999a833d0c36af6ce8ea3fecaa94f3041bb792e5e4140760c661. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/PLB382400449.