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 0xcc46fc2f6707a5bab53ce19bd03852e46a7985f4ff6342893e800934f5aea27d. 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/ec873332-12aa-454d-8167-3dae66d93e88.json and https://artists.proofprofile.net/proofs/artist/ec873332-12aa-454d-8167-3dae66d93e88.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 0x9176e35bda17f9377e98bec6d32cf281605e2b10826638c310db6efd9e901f6c. 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/NLG662000653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fdc79115f019a16b08b5818cf08dd55f5905691870883dad90d150ff170532b. 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/NLG662000654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37471b36ba847933fae9c684c8cc34253078231a61b57361adc0d51cb71a7e9. 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/NLG662000524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc421fc510881ed38a14f284f08e4fed9267680b56c5860cce8444fe0b6141e. 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/NLG662000655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b827e307f0f9545091eaeb7dbc7b8d52c8581521b10f0fa7d2011abf69210a2. 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/NLZ541901163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d177d859f2c7fbd12597c7d3e6fc13a71e0fa34998807e70a5b6ab67b01c506. 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/NLG662000656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77f9b39e12aac59ab22c9a7b962ef2886405a68619f93170fc50bbd99ee3234. 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/NLG662000270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a698239a166d8f6d8581eba817cb3c7313626a340d6f2bc8b20f9735921b9c. 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/NLG662000657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920898cbba66e6e2458b5515a063fdc2a3bbbbd3d5d6f597ee0306355f6bdd4b. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NLG662000658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b6649b554bbfb977b0bc25b39fe462073b812a286022ee3100f0244bddd463. 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/NLG662000659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa1571c1f7ca9f0ae28740b79cc9a763e061f906b9370843b1ff48ed6dfc3c5d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAEL1994584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0291d7845ac35db9ba06bf0553898d54ad2966498e4084e8932ef2e937b755. 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/NLG662000660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e99b330629f06effe48ca106d96d1d36a8cce0339a91833c2d7026aaf3871a7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAEF1998317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaad3a4e45638210e37b953c04c4cdf390a64527d6b6625e9010421ab306d4d4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLG662000661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86775b03f0ea7b7db0216879ee47a7442f02a0a0bbbb1e9eb18b89f1379bd5fb. 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/NLG662000593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25f65c1160f63e55bcd19713a8e8fc6ecb7533c16cccfc121b5c4e8c3ada852. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAEJ1967253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c70e728eff8a74cb9d27ee0c9ea0833f9ba48aab9a7ca76d5d70c92494c970. 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/TCAFW2152398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f70b234dd2b9c3989ea3f508fa0449c7a74e7406ee15f758a7f41c82355366. 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/DEUM72207788.