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 0x4875d817691fb2482df017e25eb0594119cce3dff5b71c01ed9d96d7a7b1a3af. 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/bfe65454-f08b-4f9d-95e0-8b932ccc1d45.json and https://artists.proofprofile.net/proofs/artist/bfe65454-f08b-4f9d-95e0-8b932ccc1d45.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 0xacfb444ae87649ce3dd6f18180941f51afc7000a8647b99c8250728313dc19e3. 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/TWDL72300802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f676bda567907d0d3fbd14ef3c79282881fa5463ef10392eeaa2751a08d0655. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:53:28Z), 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/TWDL72300866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d92bf362d208c77ac1f3fe9618e5ecd0a9828ce7d417249b1d4d2a94b930031. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:36:23Z), 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/HKC992325093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56789df595be19d379221322d0b016264c50f9fb00b55eaac539785087db67ef. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/FRX452489573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7defc9e86f5914c4a1eb41984a577f32e327f768afe3b7578834df83e2ef913e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FRX452489641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf384d99a2a0caf3de529dd1136e5e315ee73057a4c3f9657354ab3e3857576d1. 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/DGA082403575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cdaf1466c85763f8a1c220534ca84724d786a19c98c4f25724d53321db40ba1. 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/DGA082440903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af8930d733ba7ff9a6635c4e8ef45e8017597004be71481775eba07cd32d34b. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/DGA092443386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37db8b67cc9ac25211f87b02368c0a9d861a8f80e5a45e714321ed6d1d4396ce. 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/DGA0H2460972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1089dd477583930fb6ece666c017c4b3538b2f2c820e9ff544ca7e090204477c. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:52:32Z), 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/DGA0H2491897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff15d6e4df7a4c560a1fef73bc2acd2fef45b367cfee533bfb3bd2ef1f6b325. 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/HKC992624694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec78ebb25c8bc54772668eb5be338e10299726753c1b4b245da7951877ff376. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:32:22Z), 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/FR10S2592982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca107d1edb72160e8ebce9ca88e96cb64a1952aaf40e25572b5095beab4e68e9. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/HKC992824211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad57042b1e5458e5ea94606ba6e2475176814fee5cbdca8c7209a76c29d2bcf. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/HKC993125439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d008ab4de82f3167af206369f7da2e6e27304ed7c6ca49ab9c9668f75b55278. 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/FRX872583295.