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 0xb046d37bb2d50d4ecd285bab00c55d09ef920399da240fdc1b89ea5909292e2f. 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/44cf5a6c-14b1-4413-b398-119e729bac03.json and https://artists.proofprofile.net/proofs/artist/44cf5a6c-14b1-4413-b398-119e729bac03.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 0x557d4b07d66954c46204679b080e0e4b3cde46bd293763ebc05829b4b1b34c77. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:59:12Z), 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/BEM771200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d27b4446f5c495b91fc424d2b74fef005841367a80b2af27bf609d8c55f22a. 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/BEM771200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19f7733bd3b3cc6fbbe71c78268533001d1d6ecbf95f1ecd64e75f277834a03. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/NLB601700095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd7d0c41f64b0405e46abf7f4a65419803f783ac71ad48fc9bf3dc136b14d4e. 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/NLB601700096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a134846a14f8dc84e3903691f74847e82e9a29b24f23402e7ec50b7c7b8d16d. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/NLB601700101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9edb804214e37559b95a68bb5e74597b993d0ae7d44747163c161be1c63d080a. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/BEM772000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726365fe069960beccbc634db168d93f0a62f554cadcc852a531f6e9a92d91e9. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/BEM772000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08173767bdf60014428b83ab0fbd9fc721640b198efbc3ebd66eb950ee75ba6b. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/NLB602300363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ca48eb7177c02e8bddbf2cd700e7ae285240fb15e3fc99b5a7f2ee5d02693e. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/NLB602300366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe558b0589be18f269e0a1089ac1ecf1eb1611f9cb95b6126726f7c7d284c3cb6. 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/NLB602300368.