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 0x669aee8736af0780b44bbddedcbb46d295c7fcf89fc50c5d41927e9933979041. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8db079b1-d6e5-4044-b204-97a33a4e26d6.json and https://artists.proofprofile.net/proofs/artist/8db079b1-d6e5-4044-b204-97a33a4e26d6.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 0x27276f30b47834dad6e654bdf143067b63a97491c37b7f62281b2fc650e0d03a. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/UKU932426058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b236bc4ebd8eb3822faf2726b48e1fd58012d6c1c2908b183706188dce7be30. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CA5KR2511692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab49af53bafb7fc07ce3eaf0763b33348121a1b5fc15c30524269001db2f484d. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:04:03Z), 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/CA5KR2511568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3112f915426a7b25b2c44788d1f51bfe41781f29b84924ae5d1f66ffc570ebed. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/CA5KR2513232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4a0caadc2fb0a21c37f47b3408ab1cbb432d0ef3e5be967c000d467abf3385. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/CA5KR2513962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d04dec6863f70506794974b6b1f6b3e8eaa0c6cb21d4100defffd4a1b360161. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/CA5KR2520557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf968d46aa6bece51db9d10804365bc26a7cb6b80808b35a8e09939b211c14c33. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:10:55Z), 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/GXBNP2509902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5228f720348802bba33937885955d5c9bfcd53b7d56b97b94f2471ba5510c18a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GXBNP2551267.