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 0x6213f93b98cc410a2ea1cec9f9c9290880df99085f7bb31b1ecbaefc747df73f. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bf01756b-c782-40fc-8083-a99d7e9b033e.json and https://artists.proofprofile.net/proofs/artist/bf01756b-c782-40fc-8083-a99d7e9b033e.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 0xcc4670b15f30ea0cf075fa9cbc1dd65e624a93520f23978868eb091bfbdfa09d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBCK42409502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179fb10ae5f30f43a8c2a9b8d15ba044cb5bfc7f3da08cc83e36beba52ca7636. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBCK42409505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24850eb63391bf1f490c2c1038581ce3df987c593d1cfbefc92f7c6d9321658. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBCK42409506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x377f8ee039d54147183652b9ed92719d53e9303008b7424ea323174eaa9bc89b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBCK42409508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdddb17f6e2df2c68ae8709625d6057d27252ac04b1965e4f26c95e1af48ad1b8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBCK42409509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95824109beac749a183ede5ac1b68de2cf2e64048a841463fb93a3fbcdb3ed86. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBCK42409510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8feb542ad114021a6faab4ece6c1aa4e15cbfc61d5a183877d6e6547e66e2f0. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/GBCK42409501.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae8444a0911a77be5b8ae84da625f35e7835eb550b19f653e9e9fdee3fbb5bc7. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBCK42409503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53018f5ad06a2d35a1048443a6e9f9ca3900455276b2202f930706e8a01bc774. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/GBCK42409504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x209d878901001cc024cf52d328f22b548921ef977ac2b5d77bb001e35e6467f8. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/GBCK42409507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be403b9bec008b591da62c5ac4f1c972e086655648169256a84a039e834c649. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TWDX12100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42261c6c050fe3c5ac1a21a815ad981c29beecae028101a313f548652ba966db. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TWDX12100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59818ecd2e668a06f09fa098cdebd79f303873178696cb75b53fcd3b7a02f17. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TWDX12100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bae12a61324af7c5909f38bdb9a9232110e2392d2b49b2a4f93d6ae793d3c42. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/TWDX12100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52de02465120c57fcba9c74c86ce8897d6b464ea407de0be3bda129eecf1d1d4. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/TWDX12100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa362ace1c01871ca06871a12082346bed1e0a34aed85d31b17852b08f79d6685. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/TWDX12100026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31ce056ed421546cdce8eea04a697e759ab1a68e527ecfe3f9be0f560157d79. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T01:13:36Z), 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/CAGOO2464621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf8689c1851b7bdc442606c4b37b29e063db3f1f3540d10994d846e8721f3b7. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/CAGOO2464669.