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 0x3bc2a518c0269d1d9f807fc1d4991d3ae5d7cd774ad54c185fd6b747b88a4e9a. 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/afe4a094-00de-4e4b-8163-c2fc50d4601f.json and https://artists.proofprofile.net/proofs/artist/afe4a094-00de-4e4b-8163-c2fc50d4601f.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 0x404a8b79a03f356332c542da91b7934e41afc9fd35b9422aa9b7d7d37560ea00. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/TCACD1511525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d9ce2a88c7dec64e25b749c2c1d5e15cfc26fb0c3dc196381703c96c09972d. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:30:43Z), 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/TCACD1511527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdbbc64d671615a7e44bda8e28177e505d56b60829818f862e7d89e1b7c2a2a9. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCACD1511530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa31374a307ee99eab6e704efb0f3d5bdd957f81b20c6579123e1db7c359d6d96. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/TCACD1511536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f3e853127425bf242a76e165dff0351cf508e6743eaae0e719afa37644372b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCACD1511538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb08f01e95b60410eab8a364c87cdb806e9274993a217bb6ef1de0cd893b3ac22. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:39:35Z), 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/TCACD1511539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928478dff4d92b2a277a598273702cbd6a2e1b21a6baeb95ceb01c565d2d386d. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCACD1511540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4691dbc05c08aa2749ef812ee6f5b757e36a5275ec945a61b42e904ab524d057. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCACD1511542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x926aeb2c3b0646a537ffd0283cdd57509ac07b5a2368e8fd8fd0a4e16cde8ae2. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/TCACD1511555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a965d7fd60be0832396ba28b577bf31ec2b7a13bec6055a264c456468997a2. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/TCACY1767479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7775dd46f25aaaab92d3c7a2018124980ef39eb9c1b995b4691ccc66082441a4. 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/TCADX1872398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f063aee93b1881d81cb2d2ebee7e565be7120304e8b6c632f3add11f8cf851b. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:46:37Z), 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/TCADZ1802622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x159537dc866be6fa37cf31fb63ffe5c72501b85cb4791e7a22cf24e0b7dca11f. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:50:52Z), 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/QZHNA2540952.