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 0x6c086e745abb5ed90a2a98db40b273b02addfe3806a7f4d6298eb3551b8a87d1. 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/7c2a7095-36b9-4355-8d78-3478fed5dd82.json and https://artists.proofprofile.net/proofs/artist/7c2a7095-36b9-4355-8d78-3478fed5dd82.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 0x58946f5b0df3b613f0d5e1dacc3df146b9c5535549319515b262f7b708e7444c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NLZ290800065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8be1b3920de981db6741357c9b83312b5054e13966f083207fae0bf8211601. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/NLZ290800070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52aa8fedb168821222a578865fd0cf9a6a7709483f709b1bf543670e4342e3b4. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T01:03:54Z), 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/NLZ290900024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4cb7b1ff1fdedcc4207585eb46f5563e4b40f09b09ddca61eae6419ca865b1. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/NLZ291200049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ccde0c33ef2e804baee2446d03a06dc6087401d08afb1646d750e99228f1f3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLZ291500075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d2f9bb4470d808510ad0220d64e594c977b9f4290485051adf3b985c3ce505. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:43:19Z), 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/NLB602100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957d6e82a2867eede534c67cc9bce6d35ee676ea5165d7859e70d0aeffa30c1d. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/NLB602200164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28804a0de4420507b05d15b0daf890a45ab2b085612f752034fdb691691b9766. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/NLB602200158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d832c620ad6d3c7f64019a1c65fa2768a09f3bf30ae801a9b9d2c47e9936cc. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/NLB602200157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28804a0de4420507b05d15b0daf890a45ab2b085612f752034fdb691691b9766. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/NLB602200158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ffd80efd91d6d17706235b483f8bd50da11ed653176749397aeeef1e25b388. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/NLB602200159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796530f59754354543b3b8c7b2c436d0dc5dabcbc10e0f3fdca2c6861b16705a. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/NLB602200160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f08e0a02abae93d07590cb6e6f7a6dbfb61ebbd7e1ffe7ee41b8da4b32cc876. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/NLB602200161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb01635140a007b2357d838d1567d50a168dc265e3a68de5d3af840ee89fcd969. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/NLB602200162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e2288a4354b677d562e5f2a0dbeefd5564cb3dbe8e0f7266fc80793dd578e95. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NLB602200163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957d6e82a2867eede534c67cc9bce6d35ee676ea5165d7859e70d0aeffa30c1d. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:05:48Z), 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/NLB602200164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aacaf5791cfe538c1497edba0b103e5972f15144d5242861c2ad1a3a2407d6b. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/NLB602200165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0072e2f27acf3383d0e72246c62088156df4d0fd7e0ca16970682af29b381a6. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NLB602200168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6640d488f80e27afb614724e8a68b46742c9e9e9665cd47d3636b14ab78bc25. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/NLB602500190.