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 0x2be5fc5ec31f68c8657575f75f3b6d34f2547c0b00ef4b2c46da47fcd9e5067f. 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/3e27c867-948d-4da8-9e0a-f3db3f750b5d.json and https://artists.proofprofile.net/proofs/artist/3e27c867-948d-4da8-9e0a-f3db3f750b5d.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 0x6731ad13fd08ee9d657416a363c0301af7c97a4db04d43c11a5146bdf1154b1e. 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/QZK6G2291392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b3b76a1d1be0971358ac9108a0dbc29520ff3db6c38f14df7bed0fc7bbd15c. 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/QZFYZ2310918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a44371cbeba5152a26a019634a106b1b46b88cc7e4082b41e31b22a38fdd74. 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/QZK6F2100457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd318d0cf7305fc6ecf093fc0b1ab6d1e439db2884989afdf427feb2e36604f. 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/QMAAK2327979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc92e7823e6812374317fe289951eeb2c1c6cc5819fd5c3eacb107af84cc1932. 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/QMAAK2327980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed6f3338279a8fdae1186a4e5fe8aa3f833d6363162bde9e2e5ef19a4730bd2. 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/QZK6N2167161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ddb286fb70fbaed0c61ccb0b2ab8e72f87f5213c22bcf0f5fadb8c39a087e28. 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/QZTBB2382436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5078fc26151ed26ac80021d243b62d8b2560c86595a00ca6b32f6178b6b7c242. 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/QZTB52319691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40261aa6c244d4192b48a44905f4a74d8cfcd4270f027b519bdde96b4ec50564. 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/QZDA62472038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fecf1354d182dd1a356b0ac95dab5d1e6d9c22b8924b93e98cff68abe38cbf1. 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/QZES82476159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2cbcdd38508850091b5a53f980272f172dcc1422cf3bf37da7a88b578144d4f. 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/QZWFL2414245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7535f84292b34e23322a7a694aad7dfff0d33646517e0c1a088db1d9bf8ee055. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZWFL2432514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40261aa6c244d4192b48a44905f4a74d8cfcd4270f027b519bdde96b4ec50564. 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/QZDA62472038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ddb286fb70fbaed0c61ccb0b2ab8e72f87f5213c22bcf0f5fadb8c39a087e28. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZTBB2382436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5078fc26151ed26ac80021d243b62d8b2560c86595a00ca6b32f6178b6b7c242. 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/QZTB52319691.