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 0x94c746ae572aaa37276ebd3c9e22633b603ea2781b99d8629e5c49f0ede5e531. 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/c690302d-329f-4d29-848d-de9e177db4ba.json and https://artists.proofprofile.net/proofs/artist/c690302d-329f-4d29-848d-de9e177db4ba.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 0xdd6a431930b95673fdca7e8303ffaebd4f84282470f4e2b1348dc058f65d6e94. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/QZXLZ2303492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb50eeae5360dd99cd61c4777722683a49687c6c9456964be7b012a28e8632ab. 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/QZXLZ2303494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf2c9faeeb6d756acf190461e0cb9231b3995ed02f9901cb08852c200fcf44d. Chain 2 (Bitcoin): anchored in block 958351 (2026-07-17T02:38:05Z), 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/QZHZ52229713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a3a347b2905b2d010ab350f99b0e946d52328990a997b2b42ce03b26dd60f9. 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/QZNJX2149646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c282b59cb7993bd2b1953b62da22e98316deb16a947a63cfa174076197a901. 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/QZXLZ2303495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc04536e766beff523588d06a45637099859168c0e576520893773dc750191de9. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZNJX2149644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e3453d79a3d7647f1123d5424bb1e78c93640fc324f61bcbe6f6e392616454. 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/QZXLZ2303497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8e48b14b58cc67db390eea18cf9a1cfa4bb6930615ee3ff9a0705ed62812d7. 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/QZXLZ2303498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55aa17153ebeb8bbcf96ffdbfe8d3922289c468a3b15991076568eac810987d2. 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/QZXLZ2303499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a43c16c1cbd3755a536a9554e47674b24020c085cbbe73459bc31eee30eeff. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:03:00Z), 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/QZHZ52229710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72186ee826830cc5c5e58d06e3d7a3be86723b75dc8a633fd3eea05b42eca3c1. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZHZ52229714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1ffca7b0da69980cf7a4adba0e865387ef2a39edd28185016605075558bd2a. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:07:46Z), 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/QZHZ52229708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d183fd7132a5f36b57477bbe1a35f537e89355d2ddc0fe38847f8d0cd4981a2. 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/QZHZ52229712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc85ff4a6b886e0909e620f5f97906f046e423738141e3c9916b799487876fe92. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZXLZ2303485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb592437c6a5d7b1b8dce6e9bb38f55c6ac2fa4d2b9e9f39a3b3a0468d59c110f. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/QZXLZ2376719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x901a6441b31eb53a24bd094fb55371258c11e3d6782ba2fc027a398f32e70e48. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZXLZ2303500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb592437c6a5d7b1b8dce6e9bb38f55c6ac2fa4d2b9e9f39a3b3a0468d59c110f. 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/QZXLZ2376719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5acb74fd73b9d85623b85fcbcec94f118367394b01c543dcb74de53a5ea21a3f. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:16:11Z), 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/QZNJV2518230.