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 0x9d1da2cadf1cdeb30ff4a547b02bff17e02688b64de2da1cbd21ab35cb9c3bad. 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/8ff8d9f1-9917-4478-8902-dd2ea0a034d2.json and https://artists.proofprofile.net/proofs/artist/8ff8d9f1-9917-4478-8902-dd2ea0a034d2.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 0x03b338589b154f266bd21edf19a13956bc7cb5daa3f47ffae07c6f84ecc5a1d3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZDA42421971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77fdd9d09a386b4a4994c07c182b97fb4e948f860612efcbee4955a85ec83d49. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTB72389087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127cf9ff68307a69c23160e2f08f9f1ba28c494d7ca07f6319495a1b7e9d478d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNWR2418430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85fbcfcef8815a066c72f164319aeabf5ddd9ba1891db1c4cd3c7d76e30e69f6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZMEN2479354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae67932c5f7712b059bef550c7c8f28269bce0aebb717752d0e642d4657297e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZK6K2475491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f7f53bdd02fc83094f4fd3f8fc64f7b782cfcaedd1ba763ce076a634a7f795. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZK6G2333818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd553edc03e4958ff4ab585100b4b61f99d75c716faba5a6096d012112b77a72b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZK6P2382985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360cb5e72b8e6c883882814cc33a93ef6d7710e9ab9ab8610dc1e4d9c61ae7a6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHN42373722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd10f121f0e028554615a8f60c75d32fe644f44d5aa47e07d8c23ed2f135a4ff9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZDA62346419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf445a2d45c0a737e6828c7a194a5af2b138347ab393036a03fb97a10b73c680. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZDA42321383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65d725b5779b148b4e504b7e384d89cf3380b15c427d6b0a8511efd043d479e8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QT2VB2415027.