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 0x7143a6cfceebe1fd309fe379ce24f50561ad530e76f746b1effe9e29ef9d9c9c. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a7c27f60-0c59-4757-8b67-e6297825b6c6.json and https://artists.proofprofile.net/proofs/artist/a7c27f60-0c59-4757-8b67-e6297825b6c6.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 0x7fbf669babbecc5c58dde06341268b245b83eea2161aa7b78b0c29cbb80d5a7f. 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/QZNWX2462832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c96da5921812c45235ee22e30df99993eb066a9d717bff242581339ecc6e78d. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T14:00:30Z), 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/QZNWX2462854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4cd337e1dbedfcbd783607316dffe816dd8d1c4aa948ddb282818c11d892d8. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZNWX2462855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659215c9cb7f7f8432222f593b531c0c6a4e7f833c16c5eb96f0ab5bf5fd9d5a. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QZNWX2462859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275335f568f96099e04238e9a1bf1cc6a8affe1e9bb228eb417e26037cda46c9. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:55:37Z), 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/QZNWX2462860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a84c05ddc040a54875532d9b1e9ba95d8d9ab7066e25f09af60702f981b909. 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/QZNWX2462862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ee8a53f17a0489c1aee8654af1683c26eb3959b6310912a0aa12edc6fe3fbf. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:12:37Z), 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/QZNWX2462843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63343f55bc05ba63accd2ed8f34f7290dc600d8771b6ab034ed5984befd17a89. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/QZNWX2462844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f47260d55c2463e855576a26d45f85e8ab31cfc32940045cfcefdf1c3dd278. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZNWX2462846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x059a1a58ba026c47f9cc668ac160748d65f4a4a053571fa6aeb0bace9d7a78a0. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:32:08Z), 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/QZNWX2462849.