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 0x1ff5b3c7999551004688d662dee1e2acb740586a4dcd5226f3ace1fb906962be. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a8131d4b-0a2e-42ab-8893-3e4394c51a15.json and https://artists.proofprofile.net/proofs/artist/a8131d4b-0a2e-42ab-8893-3e4394c51a15.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 0xa25bdd841f5a08675cf8fe51e55e36a94656a9d980c8b69d9f6c2d704c7613fd. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:11:57Z), 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/USLZJ1992024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee426bbf168d73cc160f8becdd0a8c630d04774b1f5c5e6357facbba563a4b4b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USLZJ1992027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf9daf0addf6e261ef50cf9bd66322beffd7f1261ea1132e111df3278562e8d. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:51:53Z), 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/USLZJ1992032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf315da87db15a6e9fd9267eb0b94c2ec81f2cd1089bc690de5c7ecfbe31981f. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USA370537592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6adbfe2d6f702b13ae4cf106daee7dd60d6c93f9b9b329db375334574e4ecb49. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:55:27Z), 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/USA370537593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7773784610623be9840b777d6b7763710a393fc6bc070068539520ee83c337a9. 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/USA370537595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49da187d8fc8e56f42cd325860325246f7db2fe95ddaea678463c2f1efc0174e. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USA370537597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8bea907d59dce6b028ad04c0109cc30161c5f656543356daead1f8681e3003d. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:10:49Z), 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/USA370537602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x983b3b4df56b0b847ee500148089f38bb0d6c7d868e131472577da7a44e32c7d. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/USUYG1082168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a26f19d8fc225eb7f54db810a13786bae7c938135fe565f06b3011787873451. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:57:09Z), 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/GBWUL1926390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b2aa5cdf65e88c26c6da3d64eb48af3709137d91fbf90e3a373d1eacd7d171. 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/GBWUL2038036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6a6d172523b85ec76a7d86ad698af0ac3b844be3882240deab4fc732fe9fa1. 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/TCABT1438113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7abdd1e8f218048ae54075cd4a3841898598d74c87fe1e53145e1c505de391. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/TCABT1438224.