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 0x88178c8879fb4f735bdff8bbcd92963b2fe4539a8d78ecbb984a80bf4fa085bc. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e2cfef1b-d3ef-4645-9ee5-2a40292135d6.json and https://artists.proofprofile.net/proofs/artist/e2cfef1b-d3ef-4645-9ee5-2a40292135d6.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 0xfc4c530285643b9fcee684b20181a2548389e91e8bccec08fff51c27491053ad. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBRKQ2426981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb77a953140c96f28391d289b944704653e59555bebbbf3c7daf019d9ddd7efac. 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/GBRKQ2426988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdeeb6c6f676529419691294e5c1b7e3beb58ae14c2b0401dd71a89a539afbea. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:42:41Z), 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/GBRKQ2426993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aad025e7373b2f1b2cd3b151a1e70a0ebb92aef04b75dfa6a53be0334f41051. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWDD2448556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x003cca5f988bd3e5dac2a06b477779929aef9c1305a91bad39485f8647986a2a. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/QZZEB2420093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a443f4521f156c55bb195eafe205443daa2cfa672ecdf2105f44e4cc3d42bee. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GBWUL2558126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee4153c4a647f6283374ba226f76de9a1b8be069098d42311ac3f5131e00e69. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBWUL2558130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455f5130579429dfa7e8e245e5c8418fc1d7f38792ebca299d1ab99fc69e21cb. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZWDE2518253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d4937f4cbc51063d36735286219b231322ed6da946dee1e2cea4f91b6a8704. 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/QZWV32537658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde0edc111d643ae1ddf8a17a84d95159805f8bca32ace0822fa35fb09e923c96. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWV32537670.