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 0x8c5403f74e956c274613723a2495dc62fa264370d15dbeb46df98218c9566cb7. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9a4cceaa-7005-4839-8e30-46a3b59595a7.json and https://artists.proofprofile.net/proofs/artist/9a4cceaa-7005-4839-8e30-46a3b59595a7.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 0x04092fac0e4ae4598d980db7da32ad544c235b0aa1a0aebb983a2103034cfe58. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USHM22523294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709e40ad2f84b794ca95e594140ce8546827228270dbb0b937f97b8a83df910d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USHM22523295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x411c6bd5cbbe8641a5939aa39f5e824921e6ae313f47d8a4c47a6767626b9f0a. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USHM22523296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de104ad125895231ee8d2ce9defbfe88bc90c5e387d402d634ab320d97ca22b. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/USHM22523297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1acc7b126677487ebef7b5017256f97efe3ca147b8b83e3a3ff3fbcb6fb5b199. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/USHM22523298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc3fd35299f9148265f0e73aa44f7b4ddbb8b42c4c3f1c55154a22e5f265d1e0. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:56:10Z), 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/USHM22523299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84f34cd6396e94fde5c58f9444a0c32a66cd50212af17bebcac1a562d1794c6. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/USHM22523300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e680db37cd9fe9fca9df34dc919b51c01fbaea456e30cef5f00946cf98fdf67. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/USHM22523301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff9af4a36b91be5b2ce091d42b85a1a4bc97c781a47ee03e370e707ddcbba5b0. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/USHM22523302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb3108916c5ec58f8076a322de8260209cda7f07410506937c4bee2ab8a9181b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USHM22523303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896d485d4cccc1fa1867ad7abc6a011ebf240c89258d4039da4547abd68ae86a. 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/USHM22523304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f49df859165682144990581559a4d0bbaf8880682a6891cb9bb95649c4b193. 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/USHM22523305.