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 0x81769e1e73498af84a04193a6c1aa43af56ed37e18a88a2ca46553f25034cc8a. 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/1a631016-a5d1-4ca6-b1ca-65281894a165.json and https://artists.proofprofile.net/proofs/artist/1a631016-a5d1-4ca6-b1ca-65281894a165.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 0x1749995552dc33545fa54a9d98377669d492102e994d43e2119e24b69e04486f. 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/ES16E2000130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42ec7af99c1e0e4f11a6999b35b0f0856107003c48af0a0ca24e217811a93a7. 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/ES16E2000131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d24a42f49f396f52fea9742c9042ea5b14e00e5951056eda2835885c17b5e3. 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/ES16E2000147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a3da99499cbb8d9e4095868f6e2d832d69a770778874857efb8df31494ce49. 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/ES16E2000161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3a07fde901ce5aa99be65e0071fff270e1c8b1850a4104a3a7d81eddfd1378. 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/ES16E2000158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c6ce055f1e1801859b62a2dbec36c1c639e36842fa1f12696e470c04d6e57b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ES16E2000145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d24a42f49f396f52fea9742c9042ea5b14e00e5951056eda2835885c17b5e3. 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/ES16E2000147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0593ed858261f36662601c14d0a9f641e3cfa2c2af399fde11c3a9e3911c4989. 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/ES16E2000149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb780b0388c1a378d3e4b2e87ed04ac700f8fc2eae9be9aefdc7272eec879cfc1. 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/ES16E2000150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1991c887a75a37b6528652afc37c86a4b13ac36c8ff043ad0141edb04438948e. 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/ES16E2000154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ade2453ba929e5efab0ad9bddf003785bb4b532c90283ead931a5420db6a0d. 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/ES16E2000155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76523c367225cc920de761b1a391b7ebb63016f97302e299b66452012c89dfa8. 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/ES16E2000157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3a07fde901ce5aa99be65e0071fff270e1c8b1850a4104a3a7d81eddfd1378. 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/ES16E2000158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6dc7289dc5a3af1daa42af13268b07540464ac6098071be513adb82219e9657. 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/ES16E2000159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee6a7d9bffabbbecb1aa9451adda1f05756737f30f7d2bff9523b01059b2c26. 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/ES16E2000160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a3da99499cbb8d9e4095868f6e2d832d69a770778874857efb8df31494ce49. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ES16E2000161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6fe106c54de65f77cb34fb7fa75f6758ec5effe18a107b8efa737933b9ef63e. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/ES16E2100227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fc96b609626b2158afd6fd90b796525c5add9aa6124c0112a3e76b11e5ad3de. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/ES16E2100272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6fe106c54de65f77cb34fb7fa75f6758ec5effe18a107b8efa737933b9ef63e. 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/ES16E2100227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a0699c0990ec6037b1985b38d505081aa14f538dbdb8f3131075776dc1fbd3. 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/ES16E2100258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fc96b609626b2158afd6fd90b796525c5add9aa6124c0112a3e76b11e5ad3de. 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/ES16E2100272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2164979696118f68493df4af7ae4bfde62f73d46f2bff9b8985f08795a350a10. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/ES16E2300621.