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 0xf26a75d560136fa6346b03f3b1958b0e542896d3e2baced1faee9eefe413c108. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d9e4edda-c7e1-4247-85be-a2fcdfdcd9ff.json and https://artists.proofprofile.net/proofs/artist/d9e4edda-c7e1-4247-85be-a2fcdfdcd9ff.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 0xbb19be2441a2eabfdbcd47c837e53174ba2d153fed7843a017ea850ca4e0c492. 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/US23A1582083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb49c41fb401e18248485728043d501338757def55237438c132991a45538c95e. 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/US23A1573679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d3702821ee72fdeab4de3e64c9226e8d8f53ae3f1dbbbdf8a33cde63d05849. 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/TCAGM2285839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb23e779773932e7f137d6fe705661aa69ac075af79b60c822bc6f94ea9ad6ef0. 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/TCAGF2246847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9d4d32744a9bef5157ccfc047d093b0f10fe44fa82c7eed021348a26493368. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TCAGE2261372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727819f73e0e41367254f41e71d849d24f4db4f023b88dff9c91b54908d00054. 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/US23A1576814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb19be2441a2eabfdbcd47c837e53174ba2d153fed7843a017ea850ca4e0c492. 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/US23A1582083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x182ed86dd355e9467fa24c77dcbe38e1d8bdac6ef3c17ad36b0de427e53aa232. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/US23A1578346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727819f73e0e41367254f41e71d849d24f4db4f023b88dff9c91b54908d00054. 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/US23A1576814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8513af85ecf90379bc7b2e7e6e48990028d97b307355af8c88cfdcf9069f95. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US23A1574369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb49c41fb401e18248485728043d501338757def55237438c132991a45538c95e. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/US23A1573679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19827a798369862a021990b03efea7ca7e3955c9899193f2328a163dbcca63b. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/US23A1573680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d5c1cd1a52a9be7322ac1f8a60e7bb54890e23d908f26081a2f316a51775bf. 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/US23A1572058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb99bf0606aa226c46c9e8b0686232ca66052d302b935689049207c11325b3f. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:49:53Z), 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/US23A1572059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6e49fa0ff96a11db34af014cedfd306c8f0c10056dd421f7f67b7fd8426d80. 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/US23A1568617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e432bc9f18da6b9a44ea6685401779f77a80356180cbfd7dcfac53b5e966cc9. 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/TCAGR2260098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115344dd93c706cd4f5a3fb0f05856463ac8b741e270c9d2318872a947034b5c. 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/TCAGO2286526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52d0b2f97bda3fad6b3c38683a7f3d300dd1d303f0132423e9aa4a6dde3a7ec. 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/TCAGF2246832.