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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4cfc24682130dc58d95a6236f83afda897823121fa84c5f981fca472543f57d. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9aa4e19c-1cf1-4483-831a-ce11dfbe3833.json and https://artists.proofprofile.net/proofs/artist/9aa4e19c-1cf1-4483-831a-ce11dfbe3833.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c85101a4f6534bca7fd10c01c4862cbaddff1f1061ecd73680654a8216a39df. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAHQ2341461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc1a0150a75810245d802a9b44548370623e3cd7556f79ed95305620537ada0a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZWDW2465672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5115a9370c240a056c3f24d6238e66d69490b9b07a9dc87fa2de8191974f560a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZZ7M2446791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc237de3a64dbfaa64b8d96cfdaeb510ffad8ef5e592d473f60e6cb60cb364d8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZZ7M2446792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8785d417f4fdefd68e6e7dc796d54ebd08164be5a6c97e16b5cd9a493c69e317. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZZ7M2446793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf80be23bd4f91467c7ea932ad034abc9b7d577292d88f53c540ddc56cb3382e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZMEN2445379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ac54a2f0ec02424842ca0a0a559a5353a74de6d673890e9df6891b1f4ca89b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZZ7M2446794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0ca89158280e8616c4b7b12c61732e1a87f2bcfb72caf7542129439d989d16. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZZ7M2446795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29c076f175da8c60fea82084e29d1b7fbb1a8d777dbe5dbfc937d55bbc9d4fd. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZZ7M2446796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7006c2baac6a77354513fe57293059d765fe72bfb2435759c92e9256ae9b17c5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZZ7M2446797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6a6893cb0c187ca81e98825b5967f0b9600dfa24a9d624c5ef8f57dc981a25. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZZ7M2446798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd9686c907fae854a37bacf03e9d32d5f9936780ebb89f403a4cf8a8b75da84c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZZ7M2446799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bdc523b398daa8a4aa9fc55cb1bbddaa40c439d760532d3d627eac58d745dcd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZZ7M2446800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e3ede1776ba3d10901c9434069b37298c7f2bdc48dc2ecfc77973a54950f2a8. 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/QZZ7M2446801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce65e0dd1043b700a93b9d9e404227209fcf2641b838a188e6937814a3a60365. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZZ7M2446802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea024a412347807c846d46ccba553cec8b36cbace309465b9eaf44188059680f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZZ7M2446803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef41f0e820e7a719bebdf6121c8d1f02c038ac280282e8fec1bc34c54d1c216b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZZ7M2446804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e313a9ce6ab9c51f4818bb138875c780bad90809681e1b48fb426333acde82b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZZ7M2446805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cdbc10c45187b71f746676c8462864f6d4d147cc229ae50c297f8877b7afcc9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZWDW2527094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03147f83d3fb43b04be88c685bb6a73d49e74cc1e9441d62e6dda5728fbcc0a. 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/QZMEN2546246.