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 0x8c6f33314f8bf14f81bfce31ee09bc0943b56764ae62181f803ff73343b32bc6. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cb35a3ed-0ff3-4665-93dc-04fd2776efa4.json and https://artists.proofprofile.net/proofs/artist/cb35a3ed-0ff3-4665-93dc-04fd2776efa4.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 0x3a28c96cc4515e9fe8a8d08b42d08fd6b4fb4c4c13f7d658e8e11bbe2642686f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNFJ2402242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d90111f2965cae27f67e66e6a19a87b9bcec877cc9e0c24e2354999254581d1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTPX2356233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2173def66341620c25bc4eff23d4f830613b481b24fcde5ae1a252ff6da32c7. 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/QZTPX2356537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2c590ae062aa20e3d93f488b9047a61e18cea178f4906221186a1d93eb64a1. 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/QZTPX2356540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x837a6074510b9561f886a15b1f072250bb6d2455a3284f26ac3f408a2c638843. 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/QZTPX2356545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa464cf6eb611e115d0fc247ca8fc86494d295bbea75841bf2511748f5f0cb69a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTPX2356536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561c44e6df45e5b37a5e858fe2f7f3a2196ed3487caba9b2ea8f4931aab31dbd. 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/QZTPX2356556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe57e97db14ced2aedb4b0c893c330f53c505b78c3c45c1993f2fb5892e9c4e50. 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/QZNJX2362402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fdc0abd831c6b3f6c66c02440352646d9798076a4dd1a84b0bf6ac18c3fa443. 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/QZ5AB2353095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4510d89ea6c9c483fa0d3cc760e3153a679de7d7c5868ecf832dedfc669f33. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZW9K2247843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9775f986974ff066c5580ac9b41d130eaa9c42d64d78ba29ece14b0fc12958. 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/QZW9K2247844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea10d215a41a05eec5c0a35ac508fb719918b0ffdddb1a48c4a0cbaf0d4c57d7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZW9K2247845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed2baaa46e6b62f5bbead0a79d3bee20de96e70e34cd64c9b31061110346825. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZW9K2247846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb3c5301609af4f0f22b6d0e34646e84b2ffa2b8d2b4ff88db45f40c6b46030. 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/QZW9K2247847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb128d935e9bb71a3818daae7b2a268adb86c9222ba328ad35de229a35bcf318f. 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/QZW9K2272357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9236b4fe8bb5032273ed6e8966e56be56e654d80c9680e7d93320618b0b1d99c. 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/QZW9K2272358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a12c1da4198d754ba399b0d689c144aac2011521d2bdd46cacb82cc93111cd2. 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/QZW9K2272360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44826136e5aaee34157a76f88acfee50e5d4ed88dd6771cffaa286b7fe350ac9. 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/QZW9K2272361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf5ba84dcd782e70138868032edc3d1aab44134b6d46a76889e5371c0ed4fac. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QZW9K2272359.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch