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 0x2a695827fc30a389f76599ab927a5aee4dcf6c56220aeadf2898526f8a046fb4. 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/4c275690-533e-49aa-9bb5-028ef646b7cb.json and https://artists.proofprofile.net/proofs/artist/4c275690-533e-49aa-9bb5-028ef646b7cb.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 0x389e2fa9857a8d17876403bfb7bd5ce4e12f47f0da62f72f28878b7d98c1da02. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/SE6HN2064387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79aefe66b950d8c2a59fee16705573432c18a1309e138a777912c4135c849e5f. Chain 2 (Bitcoin): anchored in block 957653 (2026-07-12T04:35:02Z), 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/SE6HN2064389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa25d76a278ae8bb02d139b3950c4d370bc8400fe3e22c50dcb26941525018072. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/SE6SA2085256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3615727a9211f8262cda7517d6ed240aa342f5645261d1a07a97e167b850f57e. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:42:54Z), 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/SE6SA2085259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa493f4a923b73edd12c8ce2ec73d0015e873ddc1b00166de3d27798b80a33c60. 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/SE6SA2085262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ae4f4183684510badc0b29e5ae4a18acfb1fd2dd34d8f5803808f40ed28b2a. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:38:37Z), 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/SE6SA2085264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x142476ae343cd7211996aed099a9ba2c33efbca9c25686b6e7c1f62453dedb8a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/SE62M2133875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2efe071a71fcd58b8d63336b0f7ceebc241fe6b25d0e9c8460fd143b923e16c2. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/SE62M2133881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df86fd71eccbe79771bb4787e2a67179b2c72d28c8feb34a2b031fc51575411. 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/SE6A92342571.