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 0x7437088059783754a169b47421f894334d2c69670a9a053e79cb62ab0b584ea1. 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/4649c5fd-7c81-41e2-aa81-da36de52a822.json and https://artists.proofprofile.net/proofs/artist/4649c5fd-7c81-41e2-aa81-da36de52a822.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 0x3360f621a95e58fff7250ae79d401844a079edeed196c30798145fbdd24c0e3c. 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/US83Z2013437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f97acd029526fa52517446ccb8c7c268c1d3133af238ed720f174f32cccafb. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/US83Z2215640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e5f40ed179a0d3775a01988fde56b253c3b7504d6768794ab3e1cf2e465d50. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:22:42Z), 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/US83Z2215641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd96e5e947e4e9e7b5d564a71e18bedfa7960d7e2d3d0a4138284f7b69edc2c4. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/US83Z2215642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1380d9802d77e8f570cb4473ee29dc0f022f3792067b0a3d06daf9cc588e5e45. 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/DEXN82339081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c8522b41f668989cc5396ce7886452cc7475527c0904a624ee8cf1a48b0138. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/US83Z2349422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1534b6ac8182c7dc8f3262b4dc052374a17dda8dee09178a92b197f4719d348. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DEL022402003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b2a055a5593af80f25d1e9f7de0a9b98aca790ea7b7d3d24a93f12c23ba1107. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/DEL022402001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8380582fa5d923e43fcf4520c4adc3c448e878aa918f70ae45d7148a369e7a81. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:35:31Z), 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/DEL022402018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a6412a90fa57288881d62a20b648027ce5e0f7a9fb43ebdd2ff6ab61bc20971. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:35:50Z), 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/US83Z2500549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b2a5384bb00820d7f203a915f39f48a8109593c4ffd9e0e3efe15c8f01bb988. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/US83Z2500550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b2a5384bb00820d7f203a915f39f48a8109593c4ffd9e0e3efe15c8f01bb988. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:55:46Z), 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/US83Z2500550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a1b7cd77dfbdc3c2b4b83b2fbbe574050ec25e29d372d0ba4edafd9151606d. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/DEY472574742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f05515e86cc9a53639ac45bf3f62b063a3a1d2a252d116a605c9f02eb389e80. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBLV62024865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7c9088a49107295dd7a177a7a031be456d1b5cf8571de0b61061b5f0d0572c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEL022302005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd890fe648e8116db6e49668a4fc930d312d7566646ba40306d739766e6d65176. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DKZVA2500045.