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 0x4e0ebd67e053f40dc6cf47750e599ce54f0bca92ba0a6e1c54aa7df6f6f282a3. 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/4cf97dbf-9d68-461e-82b7-1c0a50b21cdf.json and https://artists.proofprofile.net/proofs/artist/4cf97dbf-9d68-461e-82b7-1c0a50b21cdf.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 0x23996f1dcf694b7909657780a326aefbaf95ee413b1c932f5e47c0045ffa9afb. 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/QZV362220248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeccd6a132c04347391ee10ccee25479cf15888a713ee440d7b6f680d7fa1713c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZV362221056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78484ffed82f4f956247b80d7c2e8cb4a267ab1c13c2e5bf181cae6f2d66d802. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZV362221057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea7f61a673fc7af327a9edf10e0c65f13a4fe01c5180436489e6de6ce032b27. 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/QMG492204962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd230222e7adc5a6abad632fd8e9de95269d4fe7af931b08d41d817ee5cc35242. 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/QMG492204961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e436208db82a95c986b4a1464f62d9058c489fd497ce3d405b6508f0f32558. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLZ2D2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb66c1c81413bfbaccc6a07339732a6d4d8522b93082dd7c153dcb4672a7510. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLZ2D2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa28981549976496a2dbc4e0df0e37b65a4de1e3499a86bb99362fd3e0d24a5be. 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/NLZ2D2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeebd647ef8db4c31027e9e52de71e2ffe5c4e227743178ee263187154c724e4c. 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/NLZ2D2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ab7eb786d5ae3229aabd8cf54b80637c16f85022216803773a2ad017abaa51. 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/NLZ2D2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04315d72abf076550e2582e8e211643798de7eee2e960d4bb1232563674d51b4. 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/NLZ2D2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5392be1b4e968b7a3b83b7c43df91ba4e96904669e0d2b005463756f38a01db5. 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/NLZ2D1900031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cb15434599fab54f03ebb041cceae0bb56d62b0ed5bac70dc7289effa41510b. 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/NLZ2D1900032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5de7963693ed39bed9476fd5a263e9ab21b73ca20787b94669cfc13b48d43c4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRX762431261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2555a234f7c35390b90a7ec24a4d3d8c099dcc431ecf611940f4ada241aff1. 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/GBHGV2400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeebd647ef8db4c31027e9e52de71e2ffe5c4e227743178ee263187154c724e4c. 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/NLZ2D2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794df1f084477c900ef93feb6111982f7156444289fed4b857cb77b952752857. 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/QZV362220484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5fbd990e06d25d48c7a9088fc855eac326037238c8a9be5fd7b0734c719a3a7. 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/NL1DS2101028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5fbd990e06d25d48c7a9088fc855eac326037238c8a9be5fd7b0734c719a3a7. 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/NL1DS2101028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a34f52a6b9ff9ff4b29053c5b1f5bb017c79f8f3e47daabcfdc2eb79131c133. 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/NL1DS2101024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf103d6fc234e83e3e946763d6c4325a7ddc9f1bdc9c9ed43185005e8d70ba438. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCAEW2071265.