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 0xad4a3b3889c6ca6d7c7b8dc1afcaffda40e5c2d362f1960b0b777765ad66f501. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a01caf0c-de1c-45db-a141-e23ab91fdce6.json and https://artists.proofprofile.net/proofs/artist/a01caf0c-de1c-45db-a141-e23ab91fdce6.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 0x63bb59d17779abeeb9df32ce24cfa38fd3d6bd15dc20b21d777c54c8012023cf. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZTB92450670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f09468959bb50350bcdf823295a31340f37130630eb397b21703f85cfadba7b. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZTB92450671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe287e51eb438d5b8f26ae18a0de03116eaeba60550a0a2df88a673f3e48524be. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTB92450672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd55fd54a18753b04d9cd9421233f8eb0b6c52fe663c3840bf7123b9122311203. 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/QZTB92450673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c01b37c1d2a9cae71ed0959652d6f6cdac907b0c79ea0d890da78d042c4db90. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZTB92450675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3851d814d51338b5cac4ec6b23b6679685ba92c399b9f97a0b5fed60436d237f. 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/QZTB92450676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b9e71a8519a4078ea4008e74ae42ccce16f9327e2e676592f7cacad4462e9c. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZTB92450677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87901f329e7a889f7e8b9f2675c09e8c14c922d072847e71e54c389d471c5314. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTB92450678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dbb719cd41014b4d64e304e2a9543fe895e5559529f97e1c2f579e981e3b704. 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/QZTB92450682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8676354dc93315829262bf7a98586983929979e1d6b4d7fd0545dbba8f7938. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:37:45Z), 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/QZZ7U2461766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x690be5a832bafc6fee45b72157c9eb0d1687c0d3804b6ed05fde772889ee3a0a. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZDA62536468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c094f5c1d214de6df1242dbe7befa069e03c271a122febb824bdf01b33d06e9. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZDA62536474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x941ca54d3e8248ebaf0eabb4353f3cccb5e92b7a41c27efd93028f7f349d915d. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZDA62536478.