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 0x27e757d01c287f780fed52b429176c7da7ca94c08165870bab88731c7d331d9f. 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/0846319e-d0b1-4a3a-a988-2ccfd4ee852b.json and https://artists.proofprofile.net/proofs/artist/0846319e-d0b1-4a3a-a988-2ccfd4ee852b.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 0x9fb9904ae47a087ca8b59b9d0076d73391db136e441daca1b1263f2f4a9e84ad. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/USHM80650559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204709b09731f3b5fd555d340ca01808c050ceab9e40a0b2dafd46664a700115. 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/USHM80650560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b493fc30ef1f664361454c2da23ef4d88ed828f73ba0d298dd902dd03b8f3c. 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/USHM80650561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd965bc049740f39c5f0f01120f91f6902aa54d2405343b67d65eae15ecf6c24e. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USHM80650562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7c49c54ea97bb3f5126475e9fb05bee2d0f72e418120d47c9f4a03cbd1cfe5. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/USHM80650563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9e6445368366a68645b4e37e2d95f69563bcbf769fb51aa4bce17ec0cc9e9a. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/USHM80650564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e127937e4859a977e6aa43e4a6615ec4421b551b81d0b872da356bbfb8b2ab5. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/USHM81212244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e295fd5c9bf350c1c9795173650880aef93be610e9dbfe87854925a62433984. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USHM81212245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee141a888c471d8858f3dffe6ddbae156e167ce17aba5375b43d2103386c93d1. 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/USHM81212246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded9a759234b968d76717cf38115cc02843ca583ab0c59c2b23d0e7f80384d20. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/USHM81212247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e877cb638a1711bdcf905c108100c7af2cf26e8168f3b5096ca8bf229c6151. 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/USHM81212248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6510bcf0f975bfeed38f14e7bf41ef3322849d4e363a11ac598a440650d7b07. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/USHM91261869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d68181f6954c6101609ebd6444cb1ffcae59985bed4ea1dedc3862826924697. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/USCGJ1832010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4366255b3c10e2be23cdd640307f8b0852e49436cc33b15103aabeae4f8357c2. 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/USCGJ1832011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x465112dff59e6a80c8d8739eecacd083810da2cf6fb9ee330b1de974dac53b17. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/USCGJ1832012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb061c49dbb24775a55f3f16f050f6f2972845920db8573d9524e90781869d8a5. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USCGJ1832013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf107edcc87a3744876c18c5b4a8b78125428a36e7966b656bb7e83ccba9ab179. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USCGJ1832015.