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 0xdeb545cabc8dbbef03224a3747d72e511670b650414f743105dea62e98ce3b6c. 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/e16ce79c-772d-4d6d-9605-8d32a8e4691c.json and https://artists.proofprofile.net/proofs/artist/e16ce79c-772d-4d6d-9605-8d32a8e4691c.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 0x6bc132c9bd6ff5d5ff5656ed29731b2dbe3e3e9f2a1d7ff308da403a423ded28. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/TCAHD2309471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4f52ca7f7307e4e7716716088a652baada7769d7755deba633ddb226e3af47. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/TCAHD2318170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x913b323607306973c49e9c76d18aa5aca630c57f0aa1ebef898f038f08c69ab6. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/TCAHD2318199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18ad577fc02cc926f0e41e05f716048b3f990f4800346c29cb89d7c62aeb098. 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/TCAHD2318279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee683773182af3186ea7639e363af7fcdedd264d4b6237c31de728025c3dbc2d. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/TCAHD2318300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ef74521e41b5ae3084ac73301eb3033e9e8f013e6ace6cb4a11460008fa0c8. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/TCAHD2318315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e65aba8f3611418911a3e9499dbecc7487fb3d2572757c420c03c0aace4efd. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:17:36Z), 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/TCAHD2318336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa068ea7b58e55f669e7d01f8b5dd89b087631dcdae1fb9412fdf3fd66c208f2. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:53:45Z), 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/TCAJE2460749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00fe997308b76a52947440c3651b2d1132fd1ac86e73b9cfb6ab407be65503c3. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/TCAJE2460758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x911285504dd273fc6e33fa80db8e6031110f62f09a7b01154bb7e9b26a5ab7ab. 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/TCAJD2460801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b77670de937a3bd4acded94553f33e1a5fe03bca6bc50d4f4c06c3d15a5d1ee. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:12:18Z), 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/TCAJE2460832.