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 0x6647c04715023e45452456766188af9ee4d19d6e4deff66c2f380a8a57c5c880. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f78c57be-f68f-4096-a5c5-96fd1a25f7ec.json and https://artists.proofprofile.net/proofs/artist/f78c57be-f68f-4096-a5c5-96fd1a25f7ec.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 0x5ba21234e2f95e1376cfe3091ebb6ac3e4d5a5004d0333cb765c033fe6624216. 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/GX5MX2414131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb99023ea0b4f1e50d031731d0b95d524e1140fffdc102271af0ec4b7b4e0287. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T05:24:09Z), 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/GX5MX2481934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3399d858ea027280fccb2294a05ec8c686dcfdadf1218002f6668fc3d2f9e3. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GX5MX2428999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x529ff11b2814c0ce30288c609005d7466e80c55dbccde3f712afbb4ee0e36d46. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/GX5MX2434040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe775ad1863ed5f9053de66a10c85ce9e109ab1e430226171a0697374cf27a8be. 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/GX5MX2487492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb962068eb336cde446aae8053ed145376ed735577569cd228316255b47592a36. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/GX5MX2425062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ec5055ba97174bf21e92604bd420242653bc1535ad2014c726c5aa3967b78a. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:40:00Z), 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/GX5MX2433016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7ee04590110b28f9ec4c2b76687c09161ec20115b74f2485fc7c4351ba94e6. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZZ7K2464145.