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 0xf1c5c51b766fe7e04288309286d0054acd892a29d72e12c55986cb1aaa1f9c7e. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dcad1fed-a3e6-4520-9790-da76dba895f2.json and https://artists.proofprofile.net/proofs/artist/dcad1fed-a3e6-4520-9790-da76dba895f2.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 0x58622db1870b532b16390c02150f6f9ffe41a8e0820d450bbe0f06b7f3e65a9c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNWQ2463278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df7e996ef77f70b1ca8ba6079f1106b5d8e51e58b813620f1a52dac3051508c. 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/QZTAX2492712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f28c875c32a38a55803a62108ce555fbfb42238b7dd1e307281233a908ff3e. Chain 2 (Bitcoin): anchored in block 957665 (2026-07-12T06:13:49Z), 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/QZTBA2434932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f28c875c32a38a55803a62108ce555fbfb42238b7dd1e307281233a908ff3e. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:05:21Z), 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/QZTBA2434932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6759033389a3cad70afcb806224cee6852b166fa416c6308bbb7f5e55e263f9. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZNWZ2464009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe4364c3150d5a129b429a15475593db83e32ff9dc662c89661356730b9f700. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:48:44Z), 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/QZDA42516165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df7e996ef77f70b1ca8ba6079f1106b5d8e51e58b813620f1a52dac3051508c. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:57:25Z), 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/QZTAX2492712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x872575b13aac55513cb266505ebadb7b8df2f98dcff3066d1559e9fcde5e1428. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QT3F92500467.