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 0x584424cb14c93461cce7e651983fa20a0cea59b2044d7baf25fd71e538c94e3a. 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/ced816ce-91da-406d-b6e6-0d96c8cbc3a8.json and https://artists.proofprofile.net/proofs/artist/ced816ce-91da-406d-b6e6-0d96c8cbc3a8.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 0x25fa0f706f51fd055019d8c33c5b1b1fd39173d2a102795676cbc9d9bb394387. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:25:38Z), 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/CBF8B2426651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b7bc0ca88fb7052cef2182a2bb7dff0509e75f2858dd0a880fe2d498f498a2. 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/CBF8B2426703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd009b6fbaf5bdfaf51805b45a99fbcc04b791c91d9f5fd63aac38c85d78eede1. 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/CBF8B2426747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d4bdf882730ad7bdc0648d25f2d52b1e4a2503ea7761e003a097339d24b05f. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/CBF8B2426742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8655908b442d312ce73fa8d0c53ff37cd4935437a361cd865d117fc3c8b2c6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CBF8B2426764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616156690cdcbb716b4d636595a8b1e8112b2ce82253e8ddd3a1a99cee0bcfc9. 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/CBF8B2426750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b8bce0f4c7f4c3db729e2954628ddab74001610576c696647199b197c9c6533. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:20:05Z), 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/CBF8B2426765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141edb53b98ec52f68d54d175a6e6b71f63f0cecee06afc5a5d94bcc7a9c13fc. 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/CBF8B2426728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9b446de7caac812041e467b5bc889fb2cc367b6832c2f1243f7f3192374578. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/CBF8B2426706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97012c1b6a4e5e80fd98c2c629a51fc374b9147634b56b8a0e30fd79575964be. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:37:08Z), 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/USHM92249444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6563e494e5634943e0b928658d6d81e3407daacbbc620babbacef8c141255159. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USHM92249445.