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 0x26dceeceef4ed4d8ee5acdf1ed603ba786708db2da54aeace5e218fc07d54e93. 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/f3575010-26e2-4ee1-838d-995eb5bc0d55.json and https://artists.proofprofile.net/proofs/artist/f3575010-26e2-4ee1-838d-995eb5bc0d55.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 0x00d24d817abbd60c491569c3b59dbfaf8c3e7107721275b33d4402356952da91. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USCGH2003558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883b930cc36cdd475f7789926de8c09159320b165de6f90345791c091da1e4d0. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T04:53:24Z), 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/USCGH2003559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f387fc1476a83afe3cd9ba15dc92cb103b3cc6ec0ac3566181888c8e2ab1524. 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/USCGH2003560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2203c71b08cac15ede3dd7f014c8f755ffd0cc1528615cb4d548db021aaff02d. 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/USCGH2003561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ee6d891b5c983d72a1746a3a7a7810f7928422632107be29cf760e58441029. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:35:51Z), 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/USCGH2003562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7800cdcc92bb3509f509e4a8e1eb2a9de89e8e486bf1f9788cf760de8ce47f. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:04:06Z), 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/USCGH2003563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3896bfc0f0a8bda8ab7a71583425465f0a087d32571970de997c2058d57db34. 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/USCGH2003564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8daf1fd72af58c757af29d64203c1d760b1099980780a2f86cb8844f38817cf. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:44:22Z), 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/USCGH2003565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0262001d817596e0f8c7bdc39a0523913d4fcde656c3957b8e903dff4ace36e. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:07:50Z), 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/USCGH2003566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd1ce37b7037e040f4fb0dc64a776cc8706e3940b8ba4728b32ba94b27745a99. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:54:34Z), 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/USCGH2003567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfffa1e62bb6ed01e0c56587623b86b032a5fdfea99127a87debc90bea32646a5. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/USCGH2003568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f6e71a0d064284c59e19a92b157251f33e14276be2049e9a8b6053a6a52772. 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/USCGH2003569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42ddf0eff223392f20e8de0f7b3701223c30d7b5db5c03650597333275a73e9. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:41:50Z), 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/USCGH2003570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ce6957e1b3159b14ff775e7fcc4883a62e18b47ee6e89cce49453ab653aa3b. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/USCGH2003571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded61fd5dbb210ee2b3f2e1917c912bd19debe81b4a6059977ae749c9928ecb1. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZK6F2410946.