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 0x3250a951568773b0f08d0cd71e2df3d740fc6a7f4e9c9533b63360b7bdc6b713. 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/ae9b0643-e8d7-44b5-9669-9b2ba8ab5714.json and https://artists.proofprofile.net/proofs/artist/ae9b0643-e8d7-44b5-9669-9b2ba8ab5714.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 0xdf147636db48b0cdf2afe08b3615726f26bd505d2917bfb49c09ab068e94d583. 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/US5ED2303057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa56ab12649aa56d24ebd702e8c9bd30f8e24a9aa01d2b5be9948c70d87b714db. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USA2P2403306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8db7655bb2010f2d480cecf5d9584bece26ab69c36034f4a5136b4a46b93b354. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US5ED2302646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc2a8497f4e2eba68fe145b67ab2de841e24a4ce919949b34cb2c1e756b05c0. 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/US5ED2302648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9dd9d239bdc8f649b6e75dba9b545628b3724e4355851f9942fe2b6e4ff611. 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/QMGR32214590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd383a9e272b240b326ba9346b9f7d261b2b5f8e8bdb7e0e1b1e6198b039db6bd. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMGR32214419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c606009819eacb95d738db53f7ff073965cdf6f29fec72c94ac5f73af1fb1c2. 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/QMGR32214371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd6c2349ff86beb3b0f56b43b1ea50e4baccc37ba64691d4c29888cf5dd45b5. 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/QMGR32214372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab8cbc11cc12a4938c81a03a40f3c79e46d4bf10b8adf57396900adff335a25. 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/QZD441900806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a9b5183135f186e7c071bfe08892391a2c1b4ae10c90c9f433a50b34ad0e53. 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/TCADL1885311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ad05653d4c3c442ba57a49b9d67377c1d33a69dbe6f7f3e44aabc09960e2d9. 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/TCADL1885321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f24d29afef9c04ca061d7dfc4968f07d9b449bb4805535b06c048465e86547. 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/QZHN62033427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ba92044f35b441ad94f3f24d8bfbea3367df782a19273871091537952d314c. 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/USA2P2449140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8acad13bcbd725d2449a4eb57ab91a5d97e6eba21386248563112435b12bf8c2. 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/USA2P2449146.