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 0xbf9e470e2aef033d18601b3d7023c35156d5bb9e0ca6dfe76da7256710de531b. 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/e2a15132-63bb-48d0-8b64-13cf35607eab.json and https://artists.proofprofile.net/proofs/artist/e2a15132-63bb-48d0-8b64-13cf35607eab.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 0x17f7dbf7585f064d12231967ca849d6942d24c4a985fecc286b6c8ecbd3b310a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBSMU2009211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d29eba63f808cb6f75d9886012b5e8a58da25c40a7877b87f550df4cc2f4823. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GBSMU2009212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2efce3ed823d1ffa53cb9cb095d07280888cee45d23ba28bf4ea4b0102b3548. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/GBSMU2009218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabdf01abe2ea1e7090d701b6ef5fb399c29802ce3593ef06bcc64776c53ab27b. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/GBSMU2009220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef7f3a6a1be4de9249f22232495a8aa206509612b8697cf38ed8603229b568f. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T08:58:21Z), 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/GBSMU2009223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c633128f6a73af6eaf594de27aeddcf631fad3db8b477001f445fe36dd7545a. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:30:24Z), 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/GBSMU2003507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6859f737109716a9cf962c1922c2ede69543dcd77a489a7dd80b560b6a1cfced. 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/GBSMU2003511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc27c6ce0ba9186f26d0bc69c851573e1fba699175eb9341b05ca16e456af739. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GBSMU2003561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b2d2f040a66273c2c0c426d3c343109d72b23b52a1ac51cbc5fb10987007c56. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:01:04Z), 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/USCGJ2557270.