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 0x6edd46a3b8973fcbc2b93ba85879da3f995625accf08c0dd9e3aaa19405ea327. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bc9b403f-523c-4425-a92d-ed40cc12115c.json and https://artists.proofprofile.net/proofs/artist/bc9b403f-523c-4425-a92d-ed40cc12115c.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 0xc7fe8f5104cf4484e03d171a634eeabdba5395b8fbee661c95cf4a6be91600d8. 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/QM6N22103295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7fe8f5104cf4484e03d171a634eeabdba5395b8fbee661c95cf4a6be91600d8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM6N22103295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa721cfe2b018d980ec76d120ffe00d43353103ac8c1d97afba297637eddfed74. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMDA72152347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d3a358aaeb35346dc41e288a93c537174cc88805d544bc66e2527809ceec83. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/TCAHF2300499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff1f53c7ce2d9a9d5f663218ef18478560ebab69095ec4e56960f22573af81e1. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QMDA72327666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x395cb593e7839385b22ffd33b2f6c37b42d16f6fce0c1232b41f2e14d2b7dfb4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QMDA72327670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be9292f8e354036474d69f740e39812630efd36fb13ebab596b17fe2b908a14. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMDA72327675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d4f0e8bee80ee4bc1c7f8e85dbb852244943f9de39961ca5885dedf76ef9033. 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/QMBZ92434722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31416de212c7855a19c4e5f636684090a3bb14e72f28fd78f07b13a560c1461. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QMBZ92434723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d4f0e8bee80ee4bc1c7f8e85dbb852244943f9de39961ca5885dedf76ef9033. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:00:24Z), 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/QMBZ92434722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383df51474b8b80b11bd24a100281ec2623f9ab94e11c336c369515fa7929609. 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/QM7282523977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7e10c99c219c5f058ba2672087e116875dd0d969b5daccf91f1c3e25cc3a59. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/QM7282524799.