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 0x6707ac10806aebda047e4fbf0d83baf12c28f948458581a5eb2d6a731d0300ee. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a0ba910d-cb08-4d62-8525-c689f94960b6.json and https://artists.proofprofile.net/proofs/artist/a0ba910d-cb08-4d62-8525-c689f94960b6.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 0x9f43ed565a4e9e34b11bb1e6a7afe82c701b20688dd599fbb318fe191390a56e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZRP42504463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15619a7d14de885a1afacd2e6fd2d1535eb239f3e259c312447329b5e5868f35. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZRP42504464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf222fdc98a301fb0290fcd86fed22c198bc5dec2e54c41f265e37e01ef21a39f. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZRP42504465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50cb6fb5877d3696607bb584cf738728cc574b5382ba64c2ee79894d3e72971e. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZRP42504466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5692956a3d53b39e9d0adebd9c2c9a6b9b01b0238d93c4ec139cea7adbfa9ac. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:42:48Z), 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/QZRP42504467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c08ce266686f05eee60f3b5aa1b8fb5d952f90c5e29d2e48b89efec62d70ada. 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/QZRP42504468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84754f61bb7191ec09096816fb9bf0863d327ce77cf251623862ea04f1b0bd09. 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/QZRP42504469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4ebfca519a1bbff3e805fb6f4e2a0dc4a1a1048e1e1714ea50a07524e11155d. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QZRP42504470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2221c613ebd902fa4d100a1993275f1345d66b170c85a866f991498669057e9. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:42:44Z), 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/QZRP42504471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc915b07f583e48bbad598c6b9a5723869af982a3e84e95257aed63f0f6fa47. 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/QZRP42504472.