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 0x128e744d3b316de568da4492d3010ec8526ccc3365d36f42a62a750a0c602f19. 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/e88a9ace-e090-437a-8735-7da4546a2d4a.json and https://artists.proofprofile.net/proofs/artist/e88a9ace-e090-437a-8735-7da4546a2d4a.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 0xb59557d0dd7ce1b13becc5a462cc70376aba169725c435618849c49e6dcd0bed. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZAPG1762484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x520ed853909a43eb2b421c45d104c868aceecbc71b2cbd24317cf7131424827f. 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/QZAPG1762487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12992f6dced60c42f8b25d4ebf12e0a512e355aa4a3b9252ed6134e942a0d9ca. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-21T16:52:11Z), 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/QZAPG1762493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d023d9bb42fea4ca72addf7fc6396ce742de2ee2b30b5f6f934ae8e79480fdd. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/QZAPG1762485.
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 0x806d804e460c4ffa8019dfee58d77a32b90280e0e2555b5379e6409afafdb545. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZAPG1762486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaeec196dbbb44280230e2a10b0373e3d2894cb5f5b58c9a24fbafe6b5cd3cd0. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/QZAPG1762488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c432af86cf96feca4098f2aeba9f0f17470e648d9c4298e732f8424eaaca45d. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/QZAPG1762489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1789ee02c25b8ad65692d59047b1474857010573d5bc265a397248619172aa0. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/QZAPG1762490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c0b1f00be4f3034acb0568d599137d3adabef7a703531c8d801bd81fbbd36b. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZAPG1762491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887388a46390e53011680c1087e742ff0aba129bf726424f984f55f0471a703d. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZAPG1762492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8ce92230db8ad9b35f2910eede25facfb5dd3a8b45759727aec48e6fa049ac. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/TCAHW2418177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f3f8ea64d27bdca626dac7bc250b27ea903bf9f4e96d95233659be3c6752596. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAHW2418183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82001700b1ba00b9d22d93a56bd3648480182782282cc5007d85c2704334e4b8. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/TCAHW2418188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43070a73920dc8b0c922834c98da0a55756975713b06ce9d9376d5f9d9aed096. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:36:40Z), 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/TCAHW2418190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae20f73f66d95e8fd94205a0b2263c15a9ef43aa7f34787e6d5cbca95dd3fce. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCAII2414843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a80de1d746c9db01637fb2d26a0028b46f7c069e94e79012bab66958d35ee8. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:10:30Z), 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/TCAIJ2414830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c471c8a0451f33afbe44bcfcd62e887e693ae6a348ad0c18990ca3aea2d702. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/US39N2000750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc8066f4f492b957138fba6804ad89015a8d5585253009ed9a0471898e871cdd. 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/QZFZ52038510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdad31a6d7edc7b810d350285361c03151ed7f6e560b42aa2543624fd604f822. 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/SE6XY2112686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e6002cfec2f2802fe44c559daf723297597ba6ed637f44bc4dbd54a6012f3b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZSYP2336179.