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 0xf03b6f45756a4d932a24738aeacd1a20419a9cd5457b76d0125d28495910cdaf. 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/6ce7d306-4a32-4151-a9f9-f7a5e6a4498c.json and https://artists.proofprofile.net/proofs/artist/6ce7d306-4a32-4151-a9f9-f7a5e6a4498c.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 0x79496f682497fa933f0fbbeeb12cbd0c8e9a3820631eafcdfdba19dd439661b1. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/FR2X41766333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c27ff56f8378a65d58b1e227158236549195728fd976b32cb4fb2604551ca4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR10S1661487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59aa8b6f515882defcf667ce8cb560de78a9062766e976a3fb27ac934888572d. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/FR10S1661501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa86d24c06ef2012457bb55b87cc52b28666979a998358ec076240ecc4592c5f4. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/FR10S1659422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b56370ab53c89c8ac9a531e30baad2a568d0e0cf91c356e1371af3ab7bb426e. 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/FR10S1660145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0abd5797463c66ee23c9a641abec9f607cd31c737ce2f80791119363d72cdef1. 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/FR10S1660147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a0e0a6aba8e6fa602a581026f7157998097939ae4d8376876ec97ce7ee79f2. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FR10S1660150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3dca5484bab3d8345f0270c49fc925b36c15669e9cfb890c4c2435490d81682. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/FR10S1660151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77075b3b3721fc48d95ebb70323475a6e193ccccb7b3dc5724320c4eb686818. 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/FR10S1660153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21bd5dd336c697d49a14e7ad19caad3fcdb2642503fb205c67dbe9a69d5811b4. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/FR10S1660154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8822283e225f51351112968bceb576c76f4b19e99b26205ef1213aec53e912e. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:03:17Z), 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/FR59R1685484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe229876f6f56fd8ce6b5417d028fcc53a88798c3464dfa4184e77c8e63d6d16. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FR59R1685487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe20999c355677bd21de93b30b1f309bf97ce237d52eae4b42e4966a2b63af1. 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/FR59R1685488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f335c59f260ea7e01d26b0728584791200b0898dd96a354d10d608270b7840. Chain 2 (Bitcoin): anchored in block 957695 (2026-07-12T11:16:12Z), 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/FR59R1685493.