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 0x31fda7d173fe8a1c347c7feb260655a77583486488a5c7375bbb6c682e96c85e. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e269f8c1-3906-4ae9-84ec-7e934a24a60a.json and https://artists.proofprofile.net/proofs/artist/e269f8c1-3906-4ae9-84ec-7e934a24a60a.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 0x2c7e00c8a7749de3bf4c0c900f2d2a7950281f6997db871d74ae6dd0b4a60cee. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/NOCEM2061010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3133e513db9b194c150cde1cfae6ee77303306fe6cbe4f007d826dfe33aa8083. 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/NOCEM2055010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f497e48fc18a3392d4c391d7e964e7357a81837bb1085b816ad1f2d56f90a1. 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/NOCEM2118070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c685f6083c84fb35adfba6e107ea6c86529d05704857e2b9ec4199bc0eecf7. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/NOCEM2057090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8006633873817b7578b0655309beaacdaa6a2c65fabf83b1911bbfaaec82cd. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T09:03:41Z), 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/NOCEM2310011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd85fce2071e21b07e4e57375873cf0970ff106be05ddb6068872ab681f186d38. 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/NOCEM2412011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd85fce2071e21b07e4e57375873cf0970ff106be05ddb6068872ab681f186d38. 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/NOCEM2412011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d13bc3c4110508e98e30703560155cb17db946c94772aa7b1a03d67a6af6fb4. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/NOCEM2527020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4635a25bd1ba30ff3a2801235b0fce8d1498d3740b224486258dd7029b50ea. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/NOCEM2288010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5132d8041670f5ce335d04b2205d7c013cc4a7e7a88c4805b558a641463b5a5c. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:48:06Z), 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/NOCEM2501011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e009081f8e3da6795daf8bd294f85e52e09617dc390216db6043d94f1e3919. 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/NOCEM2223102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74cb08e9b7cf98c6b11041d966d41b454fa5ad47f5f71062b97c7b796d423133. 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/NOCEM2527060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dcf18519c826355f93f9b333fd0ef811c58c4a2b407b81d683581055c5bc200. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/NOCEM2527070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8006633873817b7578b0655309beaacdaa6a2c65fabf83b1911bbfaaec82cd. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/NOCEM2310011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb88c91e464de2bdfbf44f1a163ede6ba2a8d538f894f93202d8804ccd4369b2. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:31:13Z), 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/NOCEM2527090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23cd6319cb7c8b1b9763809ec46f2f4623947a9817278e69753ee2787e3ec6f6. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/NOCEM2527100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bfb12235396ccc3647f1045b97963cc9f8d428c624bd5ea30c104590747f366. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:01:26Z), 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/NOCEM2407011.