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 0xa97b7ac6c0cd574b8cde89ce19b49079a64131266a8aac43dea754e64a55351a. 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/50da740a-6c2e-4108-bf0d-c996df37c4c9.json and https://artists.proofprofile.net/proofs/artist/50da740a-6c2e-4108-bf0d-c996df37c4c9.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 0x04365348f667c8966ee86fda41ec5f5aa3187721d91465fe03a6fc0fd9ecebcf. 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/QZHNC2417176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf8472aff61e6f3219047bdc6376ac087f578d3a46d3df436f1381759fccff0. 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/QZES72470047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47fe2ba7a3e9a1fb1fabfd7634a1348027e99c83bc50bd6037f2f02f8875eb1. 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/QM3DF2289582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfecb5e302ed62ae5536810c5cf522d07d0939ade323d7501815bda7a263d52c7. 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/USANG2256537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d5acc88b0477f1a3a3b9ec461825f81f0534e52d7c4f65101f94f9757a51b4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USANG2235641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7390a16782b564eed2a43078d10a3fe6bc1654149f7ea16251421798eb5ab608. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/US3DF2261184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904710372f65d5a848d2000b74eb9d2e056bd090c6bd6e254012611b60d9de4a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US3DF2275557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb51451f15191d0673cd25ad675472283b41bf4a75e010e594f0c1ed81f70d2d3. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/US3DF2275553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde735005a0db3b10bf22ceb2e9225ee9c0a1356005307c6bb3a500a3a9d14724. 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/US3DF2275559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1feb230432099fcf8580959b66107726fc96cc72d810a29fb6be6b3bd492eab. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US3DF2275554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe81062c0091e3b0c9c4e1a8322f498774ae53289c1b29fa76b9bd1cff774ca6e. 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/US3DF2275562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1feb230432099fcf8580959b66107726fc96cc72d810a29fb6be6b3bd492eab. 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/US3DF2275554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb51451f15191d0673cd25ad675472283b41bf4a75e010e594f0c1ed81f70d2d3. 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/US3DF2275553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7390a16782b564eed2a43078d10a3fe6bc1654149f7ea16251421798eb5ab608. 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/US3DF2261184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e5d4e92025c60dea2d3849c26fc5dc5b00b0cce569188085df71b8d2fbcfd9. 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/TCAFY2104178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8853fa1641189af737399718547c0d4a84f0ac2536ca7f7b8faa2050f051534. 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/QM3DF2147629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x034b0d90ed054fdbcc039652cdf1ee45f35e6d4efc814663d4c46eb806c6250d. 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/US3DF2189993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1572389408119c5ef1f8d169006f6e3e1cf948ba003f50147ccd925e6183467f. 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/US3DF2122963.