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 0x39284c245c6470dcd3a431842a94b051077226dee3d7cfa453a259501bf3d6fa. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a66a233b-22c5-4418-911a-578dea8b6c8c.json and https://artists.proofprofile.net/proofs/artist/a66a233b-22c5-4418-911a-578dea8b6c8c.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 0xcd9784956d3c96cd01febe384d16972dd95c166a8ca119c32257725b49fd264a. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/UKTUY2571114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e88c3a627f156de77576d4a28f88007a3799eefda8c63392c723df11f5b2092. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/UKTUY2571115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f5a32186a591f23ec70cf756960b8f83d28496cf2c0831b2451ee90d3d4dfa. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/UKTUY2571116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6fc4f8663126d6c9af48d020d62e9a215cfc7088ec2c3018de2608afb09c1e7. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/UKTUY2571117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85263dea71000de715fa0e0389edbdb9224385fa93903fd74a232d8f42b526f7. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/UKTUY2571118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x465ce97f5cbd742dbcb8014a935083b636ec4fcb60be3487ad8a9e2ae73574d0. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/UKTUY2571119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41fd0461c47b150bd5eaf02283aee8e03d95a1d7046ffd3d6ddac01dd3ccb3fc. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/UKTUY2571120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93190d87ec146d2904c57bbaf853922dc2c1e157799a01c2ae895e311180e262. 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/UKTUY2571121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1313fa0a8b3ad3645b5bb8e2a380fc0ea8fd9bd03179f802793fe71529916853. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/UKTUY2571122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x103282f912ed013cc08b35a8f86737d3c87bd0449bac383c82789a650ff4041d. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/UKTUY2571123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc6975bca7316ecde0b4d3d61f3a969a5c8184d8d3794134a9222ccdc6a3f5c. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/UKTUY2571124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03fce32bf0772f657a4503e7073d9b56b79a34cf10e71a6d07bb1f497669764b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/UKTUY2571126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe17b950d96ba95bf5008675d581cccb94ac46dec9e673d8ab8b42d815c363243. 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/UKTUY2571127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24395f1019ef789aa9a9d57daf9eec9549258545fe94f12932f4e231d41ed060. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/UKTUY2571128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a216e463518957e4235ee0368651f6b1aaa9fc8490659d2ba5199fa2fa70d38. 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/UKTUY2571130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd85860cc010840a43fb06746f6b2a6f9f0a0003f48ec315a7274b01ac45be9c. 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/UKTUY2571131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x759802bc14636d77873efb5af902f276f1e9d94327841bc5ef3621f54edf69a8. 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/UKTUY2571132.