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 0xfab273e78b6d4162a0599919068ea0370806ae2582afd5c43715010ff68f2d0b. 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/cbb55de0-9138-432e-9d17-89c943aee018.json and https://artists.proofprofile.net/proofs/artist/cbb55de0-9138-432e-9d17-89c943aee018.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 0xe173428c87722daa687a71e06b5480413a3ae5507ee869c816eca543a65805f7. 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/QZMEM2145290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8919ce511a0d6a48a78da0ac89ff550038fb098268aae49792e07631367ec3c4. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZMEM2145292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302b99bd41160873cf50ba317cdccf8e2729c68a2aa9675be8875608d8f9cd6d. 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/QZMEM2145295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471755e08ecc5292a7ca4a0dbaa6bde898308872158258168a9f54e40bd2d944. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/QZMEM2145297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39979d69a0bf7029f23c11ba1fb1bd2e4b0c7a7d0df625b0f1f2ad020d4f8e63. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZMEM2148348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87dfc35962c6e575183f3d7a4bf8c066a7f0233f75297289fb9b5959010f9147. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:52:44Z), 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/QZMEM2148349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c2dae5d3fb637a326b51bbbd00438aad0517639fc1553f7413f112055f9db4. 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/QZMEM2148351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac0463b68c79381e9c0e59b5cfa383f19b39c2656caa40c8da41a9ec91a7b952. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/QZMEM2148352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4d05eec064b7c749b0e2ca550e91708891550d02101dad67504d1745a2bd20. 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/QZMEM2148358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb77649f03b25399878b6279894e13a2a684954a5e334acde7416807715554636. 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/FR10S1518774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x993fc20bdd897eb29c55a5ea55786cc1c0746d1e896040b0699ce6e3b7dfb30f. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZHNB2295623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d15f6d514fce67cae1c3394262c6d79e0cd9e4930fd0defee06e6deff598016. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/QZHNB2295625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa259c7b57c8f145e13341b0b1f98ec043b999a8502cf90b64e1b037afdca89b0. 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/QZHNB2295627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0dd06067a3a9ef13e401c7d93fef78a3258fdc62d5acd406c6ca44742de6d04. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZHNB2295628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5e1d982c8e340118fe3ed5ec892e2dfe49da09caf172e7fb9c1300bebceecf. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:28:57Z), 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/QZHNB2295629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8443c95c65284e8f7ad39c1ae52c2b127ac06c8bca36da7f4c636b2d05f245f1. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHNB2295630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1479e5a78726a6cfdbb592069b6dc6bae9b953ffcc231bc955a40189585669. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/IDA141706000.