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 0x08d732694ed684ec95609ac66daffcc74b4cc6d278a3f5c8ad1694c99e4d501d. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b1f17354-e704-4411-9800-b23f4963d2a2.json and https://artists.proofprofile.net/proofs/artist/b1f17354-e704-4411-9800-b23f4963d2a2.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 0x4655f7c5361ee46657958dd0fbeb82519b9c6869d58818d0b9abb6a9a8302ea8. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:08:57Z), 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/QZMER2243256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0f4ea83a574e020de86a513ac7b4e0de295c0732a23593b64a23a56b464e8c. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZMER2243257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d3a106608a33b7ef7c762e8a17fb138745947940aa751ecca387f00f549d20. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTAU2208937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143ea425550647db124992b2489d38909c0eabd1cd2c1e08fa2bc5a086ca83b1. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZPLS2302697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2fa08a7b8aab52b1db68b9096995f5c4ecc42485e386c91c8de21a56be1087. 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/QZDA52521788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab1f8b0fde4ca5eb8ce004b00c5e5db039dc5f85b272d06d262a7caa07f9c419. 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/QZDA62554309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18621a2483fbdedefbd93d2dc8fe331952dce134def1bbe5d1b2f6f578524c2f. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:50:57Z), 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/ES64E2499367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0efdedb0f536a0702b792743f6572bedee66704d948d6d64ebb222a5439e97fc. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ES64E2487541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2fa08a7b8aab52b1db68b9096995f5c4ecc42485e386c91c8de21a56be1087. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZDA52521788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6dd85c86e8a91d495105d99b7d285af21c8ca37f387a104f21c8356c5b9217c. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZDA62554310.