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 0x2fdecfcab037328397a54e37a62aa0f976c441e5fd8cfe766e2477cbe11b24c7. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f46f7d5c-07e0-4116-9c46-3f4aa43d5b9f.json and https://artists.proofprofile.net/proofs/artist/f46f7d5c-07e0-4116-9c46-3f4aa43d5b9f.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 0x07429c20eddeb774195153915ecf9636cee56ce59c1558206823e8e49f9c6fe8. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZW9K2401412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fee4c8a6ba391786dcf7e19c7e2a5acc4d36d47f573e73c7415e4181aabd05b. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/QZW9K2401239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad07f638752f3a47ae65e22172adfcb5f8dd0248b693ced818f70d0290319a66. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QZW9K2401418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0498cd119f5417b1bd7c3f63cec47dca07bf51b2f63c772af9cb6c0b1fe2e6c9. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZW9K2401406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08087555a627cd7b107e00f35fe287fc5591afba2c3ff8eae1660001ae143ba9. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZW9K2401420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea94fb2f08abc4f25d3bbc478c099776e0ca5487302803533daac1e6dedff3f1. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/QZW9K2401382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02eeff6c66d329b5e51a62d85fc6966ccf951b549fe0cf93d1a54c8262abe10d. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/QZW9K2401380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf2ae141530db9d4719a35535a16ca5ff670ff28c3b76823c4e0f6e53c29752e. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:43:00Z), 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/QZW9K2401405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32fae6557a7d4cf6a1636fe56d82c6fa06f66c84cd9fb138e0cacf6bf217df0b. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QZW9K2401407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61fb455f5a31a94c64d49571b769a1c1aa8039747f86c415be22f227173b5179. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZW9K2401359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb801747cbf91034a9c6b7d8ba2dbad142189999b8be2396b67cb0784a22944fc. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZW9K2401378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa405e9f48f5b23e5c85c52d1a71729d5de83cca26620f535fdb15a4e6548c691. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZW9K2401335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d3d58025c566496e9203a72ee285a618dfe8400b42b6e1d1169a890b04f4ee. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/QZW9K2401384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353296272adae84de8d16f2a9bece14378337b01fc29ace93cc2ffcc11c01ec0. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZW9K2401410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a64c44e2693119b57e2fdb3cdc120116739be589ff0036e0b89e61c711f8744. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZW9K2405529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x988ad2b792345beaaf8b4bd520a2959c1d70e3aa9b71856c796e3272e0e137e2. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZW9K2404843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0e2576fc9d0b61efa1fe819a44938a5162c7c6ee6d1e83ef671e4daa42ea64. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:40:45Z), 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/QZW9K2405532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c7240a50bd228d7b68ab6bc8b4a0748ba1e096540a510cf5cf37dc3a994655. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/QZW9K2404845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c119dd296e33445a2cdad78204a04b6d83ac489bb18439aabbe1ff3417273d. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZW9K2405536.