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 0xcbe6c3801f24b46ec59384cc29f9ee458857d7bdb9088f0816937a46676a0dbb. 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/4b34f7c1-5403-4aa0-bce8-ccfad688c932.json and https://artists.proofprofile.net/proofs/artist/4b34f7c1-5403-4aa0-bce8-ccfad688c932.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 0xe3b45eff434cc2d205c9bc2c38fe5c6b5d248a487da0f8d02c01021fb64d2f57. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QMDA72263464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6304f753248ae67818e48bfe1dcec373e5103da9a1ccd0cc7feba1aeb0e110d. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:33:18Z), 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/QM4TX2343252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69443692acb4e1c4a959e0e6bf761f0a2a8986a458bc34b62ef6c63c1e3efa0f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QM6N22347774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03489dd68c89517661360a0710780114c83f716fc8c119421a4e5d534788e842. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QMDA62209710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9447bff1ff9709762f845f8d8ee0f52907155210d68231a67e90d8b0bb11bf53. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QMDA72417212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012c093f3dcb16c8da676a99296cd5bd9a94e48cbaf916530b0928af66c26102. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QMDA72469322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012c093f3dcb16c8da676a99296cd5bd9a94e48cbaf916530b0928af66c26102. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QMDA72469322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82bfcd48eea87b301f2b5a4e3cc1ece4edcfb4e2878efc41de7d5a0b1c6e0878. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QMDA72469345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb26e124e6d1b16bd3f3b2f49b4bf3099d43eb3927c67eeab57698fa026b216b0. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QMDA72469340.