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 0x8585d92970e182c3d2b71cab47fad9a8eae5278e450d93529bd4642af6456c54. 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/5d010424-e7bb-43e6-8b89-ab3edff754b2.json and https://artists.proofprofile.net/proofs/artist/5d010424-e7bb-43e6-8b89-ab3edff754b2.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 0xf3efcddb435c259ceaa882cad488c132c638d09f80133df077d7b650cc0065a7. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:11:48Z), 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/USCGH1953097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd67679642f0eb8913e6ea82f7df7085c4d015f1c22952cc15f0356b51334b1. 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/USL4R1929327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d705f49c63b8beca8fc8b8af7a216eab7b25e0b47fd72accce9c78ed13bcc51. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/USL4R1929328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e531289e9ab871835b77c8a2532b696411377b57a7587a01b56cc173605308. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T01:24:09Z), 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/USL4R1929329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa289b8af8d22359abd9d87c9e7dfc41231dd50721307493bf5ca4b6e695cebb. 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/USL4R1929331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7915b04fdef089956b5e997c2b5b65c4e7b6ed256e979ee6c5a35f9106d2f157. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USL4R1929333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21cbed659f59943d9037b01dc7d030aa877887d22960448e3fbf73f8b2cc581a. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USHM82175718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8eb2c203be43d2697d4468a606bca844e6352f3c08a76aeeb0dd2b530d28be9. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:48:08Z), 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/USCGJ2248305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1eb5a479b7fc32d8dcf30d566f5bcab1f0cab58a6510d59d33ea68fbd6aca7. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USCGJ2499874.