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 0x8575e9e191d188877d87c04b6b9bc8cfdc031258ee53cdacedf8cf62b1d1ed1d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f7bf9abc-91d5-4010-86ad-9416597cd7e1.json and https://artists.proofprofile.net/proofs/artist/f7bf9abc-91d5-4010-86ad-9416597cd7e1.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 0xe6944244b6d3510b4a7f4507b5f106f99f5dd91456b2b291741f4f22ce1dda8c. 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/TCAFM2155679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ba07ece84e723b2a4b96e3aa894e69a19aed20023d737a52f866a79daee43e. 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/TCAFY2135515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767b95b68863b9a91c1363c429cdb6b4b7f9e8b88e553ac2ffbd59712de0bc1e. 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/TCAFY2135524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1cc11052a636635c7e5ce9c8f599b27e251b45f409215b9dbfad49064f6214a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAFY2135528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d00117d49eb6eff20eccf2112aa6854968fdbd20f28094831a69def2a212e6d. 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/TCAFS2131443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6944244b6d3510b4a7f4507b5f106f99f5dd91456b2b291741f4f22ce1dda8c. 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/TCAFM2155679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe592542ed29e9e896487764a8ed301f1c439f96a1da6d2bd5b27a780e1a83e46. 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/QZNWT2076829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b252eb1874b0b684347c1241385f1751626cbb25cf7a04df67b84c21751b6b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNWT2076830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39166b3372fe6df77ccf960ac8226588ef24b7d27d1649c8b76ad8abc6ab0fe. 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/QZNWT2076831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4aab527cf4119c849ec4d34d435859e510ffb5f48dcdc8ef6f2ae7ba6e1b2e3. 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/QZMEP2053647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a6ee919e46ddfbb7072998d86e2aeda6fb0cf237dbc5e7d61e7585c031462f. 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/QZNWT2076832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e67d0a0ed7a2d7b9cc4b9745753d2eb6af73107bd74e631a24b6eacf875bed. 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/QZHZ62080461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd136c3c56cfeba65a368798e5e9d4ecc0e07394085eefc5ee57dc0b51aa64e7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNWT2076833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33aa912e758012a3d6f2af4f42bed9ab64b28219b8b1fdd9f6969d5c707f9c92. 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/QZNWT2076834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf22fd778b9183ed06bf2b2af861402dadc0473ce40042d83ef7f780c50304ca3. 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/USL4R2226193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d9a7402b78690cfc3dfc51e64a272b2da60fcd38eecd1baa5ce618fc4e5ac8. 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/USL4R2226195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd61c02214c3cb79d985ca8052b25ae2736729d16542e58d30a200ecb809a8d. 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/USL4R2226198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f19f4ca785bc917ef06274fe2e474e0e5f144b3cf794152ec229f120eef7663. 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/USL4R2226199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb56aced2528d0b16937a59f78b1f8da32c6eac677e75519c388150f74f2d62d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAIF2493765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa910c93ca1745017d0585eac238dde67a725a534b4337b9a377e155e5dd1bc49. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCADS1869188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa6360ad02666c54c570741303704db4e41f1741f1b9f596adc11b4d2481484. 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/UKXN21995657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8562927ace5bc7f1635e7dbdede043afdc6654314fef3853677ae100926d3b. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZNWW2206574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5cf73d7de5ed0b60734eebfb2b611c0a2602497132a9724b2b64ba316404ba. 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/QZNWW2206576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a05079611523bdcd3b4751cb2b92164475b809e93b7176d9975dbf18cd5d01. 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/QZNWW2206577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x139d07d0a884900f35ae8bc026f25c6087acb2fdf475c64230455d93bf580d2b. 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/QZHNC2009491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff5f48640ed95a4a7dc34a580f991d3079678ea14a6d1a179c31fecf38e4faa2. 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/QZFZ72115530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dcfdaa741190d8416d2b1a962779ddc0d155c7ccfccb8b68b975d444bcb893e. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:08:51Z), 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/GXF9Q2556023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47564f40804b9873975bf17735af7ab4a3e1a2ad196e7195c3b92dc5f0072b8. 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/GXF9Q2556022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6136b025c7b37b8f0e53073c103c4b1e3ae63a27366c21311ac5b98c3797d4. 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/GXF9Q2556020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370a40588bf4246dbc4f0ce83e204ecdeb298de86b44e5431ebcc81ea821b110. 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/GXF9Q2556019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0acf8540c6bbe8457bca3caab48f745c873d839db98af98f4a55da3f9b323ea. 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/GXF9Q2556018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52f320ed202857449ebab394dc7de7f3599a658cecf3c890e850aa931498154. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:31:40Z), 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/GXF9Q2556024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba74d7e6a30ab8813131deced1196b8b89aad626e5a5273063f960771f56bf36. 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/QZTPX2482400.