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 0xc02909866c10e383a319df1af32a25621fe7ee855e11cc4df75e93c0b88f211f. 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/a2d70982-317c-453e-bf69-b30919dc7231.json and https://artists.proofprofile.net/proofs/artist/a2d70982-317c-453e-bf69-b30919dc7231.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 0x037886577ada0cc7cef08a444fe38e10057dd512d8926cb00dec568e17ce79b4. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/TCAEO1984480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0ad3bef9397c6ce12217f2e1531f0443d72095f0e64325a5c9a02cf7b51a52. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:37:28Z), 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/TCAEO1980863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1876ef46ad130114882be637be737c25958be98010efa9d200ced46b33422f5. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/TCAFO2119888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4df2beaa340a4f28e7f220ec65dd96d5e9796a6e342d6c381f1d92253ca7c58. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:21:12Z), 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/QZTB52249179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826ba503896448aaa403b4a58609e05285cc106783312fe2597a04919a2ebd3b. 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/QZMEN2348478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e476fc977d564f16eeacfcae46de29e73721c3be9056451b37d437e4e5cbe20. Chain 2 (Bitcoin): anchored in block 957674 (2026-07-12T07:50:41Z), 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/QZWFG2369031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x178b6d27cc8942871b8cac89803bf63b96559fa1bb14a4f346c4e53568413faf. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:55:21Z), 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/QZWFG2369032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9970fbff16a2548c71bdcda13aa0c19f0abb45c3c8d3f0d47c9c946e036d491. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T03:19:46Z), 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/QZES62328696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d620e729944341463da21845e064183ad82fef9fdb249acb639e0cd38b81659. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZZ7Q2591885.