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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7971cc6ab49ccdaf2636269385ce7ca0e7ae858f11830f3820a7f9dcfe6de6f. 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/00bd8864-1729-44da-9662-40dde4f20418.json and https://artists.proofprofile.net/proofs/artist/00bd8864-1729-44da-9662-40dde4f20418.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93954ff348c78372b58ea10776d9850a7992b74532e18369ce3e8762446e04d9. 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/ITUM72000984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b9b757e3323a74cfef8dd6638de699c38f17226b616677637993711f0e5bb5. 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/ITUM72000980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b1e9c9410c84b600d57993a6374db543e8644f820c8502294223d64c2a3713. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ITUM72000293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd2005f9a81b42e94ece7ecd1c9bb71660ba2efc7f9109554134437cc8ec606. 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/ITUM72000290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22fb92c2371f3476972f5876279d18a71c5278a5d451a9d4af8ec9848858cd08. 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/ITUM72000292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2713a7be755c2ef775b1879d14f984c40c1ab3a30cdd4a0a4544c57275f80fee. 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/ITUM72000299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x474ebd79bd9f592740fd6419042b73d7aece7d6b52992198263540f9b981dd07. 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/ITUM72000291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9645f307540583ed8c0a39b415286ff439553151337fcbf7df883d5006890a2b. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ITUM72000269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc8ac2119a0e815acc6130ca57bd126b3c7e59a645f21f9050b11e6b526c253. 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/ITUM72000294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b1e9c9410c84b600d57993a6374db543e8644f820c8502294223d64c2a3713. 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/ITUM72000293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd2005f9a81b42e94ece7ecd1c9bb71660ba2efc7f9109554134437cc8ec606. 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/ITUM72000290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22fb92c2371f3476972f5876279d18a71c5278a5d451a9d4af8ec9848858cd08. 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/ITUM72000292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2713a7be755c2ef775b1879d14f984c40c1ab3a30cdd4a0a4544c57275f80fee. 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/ITUM72000299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x474ebd79bd9f592740fd6419042b73d7aece7d6b52992198263540f9b981dd07. 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/ITUM72000291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9645f307540583ed8c0a39b415286ff439553151337fcbf7df883d5006890a2b. 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/ITUM72000269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc8ac2119a0e815acc6130ca57bd126b3c7e59a645f21f9050b11e6b526c253. 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/ITUM72000294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9645f307540583ed8c0a39b415286ff439553151337fcbf7df883d5006890a2b. 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/ITUM72000269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0747cdfdaf6b5f92460d3dbcb743921ec12a54b2e76a6036fea6f3d1e3b41d04. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/QZTBE2304834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd64576e3f57713989b412244d47ea526d358494b25235f62dc5af2fee2c69b1. 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/ITUEK2000089.