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 0xe89564960268f39134d803ec20e8bde6a6a0a87d7e95e4369e642a458ec17cd1. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c4a35b20-a81a-4537-92de-b7828c4908d1.json and https://artists.proofprofile.net/proofs/artist/c4a35b20-a81a-4537-92de-b7828c4908d1.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 0x1e27793de582f2030a492cf95a1820fe4b606d68acdf3c12441f4ecff8e53125. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZNJX2091665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a0f96c920c471ee5d4dd1abd0bf79521f965ce912e8bc8bbae5c5d8c5b567f. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/FRX282132658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3cc3248b05abfd8c24ff5395027a4954f713476c9895f5a265e78401fa23f5. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/FR2X42398947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3405b1cc99d8cb1566750261fbf3494a4ebca64c3eebb20ed137f15fd47917. 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/FRX872334622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde545e0e4275595a61ccd72a8c41b3c37d8f19d81402ce1d8084a72834c3c42. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DGA052311535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4508ac47260ff0d757b16a8c1d401e096865b49821de88c2389e8ea748cc4fae. 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/DGA072307086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe60497493c3ef650e75342ca233d5d90dd4ab60d03547ae666067b249c3f513c. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/DGA092370384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f7bd691bdaeeaa316287aa952c578bd28ade77dbf3c0aa442a7aef0826eb8c3. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/DGA092370386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a5f6b9e9773da358a31e2cb00b9da44cc7e78ea7990aa2586d8c0d12a8211e. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T18:23:07Z), 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/DGA092370387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66736b986f2a1e01cd97463d9b2444cde0e715be7a96b456c712b254ec8bb9be. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/DGA092370388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552f328850eee4d2634da79c7c0c818f52d3260fce0ead649b30338ddd1547cb. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DGA092370389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa13d99b69d91b39b23712bba6479ce20963b74a92b07f761a7c7da5c42971c40. 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/DGA092370390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1bf828ef5be805bea0ff36669b1e3f6cfb8592d16f240a17994df543970f89. 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/FR10S2476508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf68ea2c03f17824aec216553e2eee1ab83ad31ebb324f985f15a312c3b77ef29. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/RUAGV2405505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9024fb2ff08de597c8c9dcc123d60537999bfc2482be5fe47133ce993e0899. 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/RUAGV2410364.