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 0x9f0af0d3e05f39fb0b38f55dd5780d8136bd92a57081bfb7622a3cbb5f3e1c09. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fcd4fde1-c9e3-4acc-8aac-755d2ed14365.json and https://artists.proofprofile.net/proofs/artist/fcd4fde1-c9e3-4acc-8aac-755d2ed14365.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 0x70efd1aa0f855db054b65126180d89f9950857d0f476cc2acf62d122620fbffa. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T10:01:44Z), 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/QZDA72571088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x743b21d7aae52a4a4b0917686723615f02b14e8da2d64fb09ab20e289a393c4c. 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/QZDA72571091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c086b4328aba5777b3148a9f234066fb87b1225ad04ce9bbf223c753f2f01b7. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:37:30Z), 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/QZDA72571092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31978d3e8fdc77019db433e099994057464f4c9c7ec4a6eacfb9cc99367b021. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:57:26Z), 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/QZDA72571093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86173ba45d55bdd0cc3c228e76620568fb6e5e21ec2d9a7df85731b9a901066f. 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/QZDA72571094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4cba31ae029b08d152b74c8732eadb5b3185bab19f960cb3a92fac94e20756. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:58:20Z), 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/QZDA72571095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c2955f1b364275f871e35e153858afd53b00e24174969611c1033883d08556. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:31:53Z), 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/QZDA72571096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c8a1905aaa02d30d6852ca443995e36abd96624fc25498b8848a54123d13b5. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:35:37Z), 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/QZDA72571097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65cec74cf18351ae85f7d1436fa720805c0feb6c2f7a92eab9d29f0342ac0834. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:43:07Z), 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/QZDA72571099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a47cd6993e887dd37f8de15a66fe097e76cc7ac14aceb6cb81e3c83e08dfbe3. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZDA72571100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c783c333882a39b0d43617aa9bee2ab4327b77659c4de0210417ed02b9809b. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZK6K2528197.