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 0x528b49dbe0afad80f272c7d1b0146607b6f39e3708b90e9b572fa6a0b894d34b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/730928c5-afd6-4e4e-8d04-d3d8e98600e9.json and https://artists.proofprofile.net/proofs/artist/730928c5-afd6-4e4e-8d04-d3d8e98600e9.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 0xaeb30146744ccb49ba283c85fedf5cfda75da164cab19a835638c4db207e15cd. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:15:40Z), 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/USDY41989668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81f1b98867611af54c8f8baeadfaf056228d8f992e65535674643cb6d5a5219. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/USDY41989669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d48400ddb7ea52f75f50f95c611b8411e45cd328e3f708992faeacc9b72f823. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:53:24Z), 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/USDY41989670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63400425f22c9401b7c3a830e9877f7c23fbfedd7fb8a367c4b8301e6190c89. 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/USDY41989673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8458497833dc201a6c197dd036c4cea22c0cb889a4d1317af435a0481d508cf1. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USDY41989674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d90c2c475d1b5d456b241b93997f828cf50cf027ded0bd09a6a3d4a3e35ed1. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USDY41989676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb1409024d1de772a7b82c76c85875b8ebc1fd83d4c86d6ab81a1e78c961f859. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:59:00Z), 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/USCGH2008988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b7aa0a13c732c667c780789cf610991ed879874f4d749f2eb91036c0381802. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/ARC572000286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7dbe08d5474d7dc04ad1124b7f324209d06ed9ea549dce8ad68086806f3bc7. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/ARC572000287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622facfd4888935255619a176bd17d5df64a8d750351855031ea35d299b21274. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:58:07Z), 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/ARC572000288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee4ef7b1ecf57235b68f3029ad41d33a1591e548707a438579e494cd5b7e3f8. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/ARC572000291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9468624a842531fdb92dca3e176d8cd915be56d8867cc74197685dfa2c3071d3. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:12:33Z), 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/ARC572000293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe949e1a980413d4ea85b2c6062c27efb3bd2b57fe9be176aae7c01e49a8f4ba9. 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/ARC572000295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa516d6ceddb80ceb0347b5d92b6066195e03632013af1e0b0f4d8616a4c7785d. 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/QZDFP2122131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e8e84e34ba5c13f1467efb9a2a01448499df01aca7c8d2b913e6502a7d27914. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZDFP2161808.