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 0x692db127e3737c0b95ba830804c84e8b24c37f2ddccf80b7ffc28069e74f9731. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/20c4524a-0765-4111-b8a5-855e29bf35ff.json and https://artists.proofprofile.net/proofs/artist/20c4524a-0765-4111-b8a5-855e29bf35ff.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 0x53c230b417ad7def27a33368474e3e2aa42d970b506176589c9248e228e7aa40. 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/SEYOK1804582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f6b3c0f525d448b6aa84e692a5502ac9413a671425e70a79845fb4540beb6e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/SEYOK1869255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb531629c821ac79dc64da5318d63bdfd13576a5389c88b6740de6c91d0537afc. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/SEYOK1869257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3db7017b8c2557cce1becf13a17c1cac35bd755e2fc74003223e24a0f4524c6. 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/SEYOK1869260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cbeab09af7e408319b3f58ca933dfe44cec9d98a291fb98542f85a466c175d5. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/SEYOK1869262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6003ab774b32adf2a80b248c889f61d528cbdb7a2004bf7933a3e4c7f50205fd. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/SEYOK2015412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801d4dd9034fb96118c496107b3b4e3a8a5e0cbc8802775b07e99828ddced538. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/SEYOK2015415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438bd349256685e6c586a0d97b41e53ecfb727a7bafd454bfba83250afea783e. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/SEYOK2019140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e2256b18d6d241c724a3ca649a8650e026d61161fafd19abe3ec0d51c1fb0ef. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/SEYOK2028639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff6c84775875e32d469a29b36504c51e02ffe64cf0e210d98d693bf1596dcaa. 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/SEYOK2028640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b8515527268815f2a682c5f243c70915d10f14d062a0886b56e04953748732. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:41:44Z), 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/QZK6G2185632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1669c17612be51416ea1bee15b5c81c34ab590a6e184822cea2d6563bf67349. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZK6G2185633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a0047959e935c84c8bcb0e049b895bb2bac0159050af670831a5e5f4f13521c. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/QZK6G2185634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe0774e21033f8ac5be0aa2dd4e1ddfe4dfb34a79b8fefea14c45a685c4d5151. 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/QZK6G2185635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95affcb7a23840e3f0a416d4b35c603f9b6d09e7f1518fdb6e5a5a6569ad48a4. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZK6G2185637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf641e2f17b3e6ece30f924e98fd8616ca24030ca3f64849deebef773aa8be91e. 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/QZES92365787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92386e77e284b17787f7a470e60322c68198260db9fbb8067003ce9104a1f64e. 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/QZES92365788.