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 0x6cfc7bde14fec94c346fb291ebcaa446a133b9db9b3a43968bb9e3742791bf58. 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/5fbbd72d-85ac-4755-858d-eeef6748f8b0.json and https://artists.proofprofile.net/proofs/artist/5fbbd72d-85ac-4755-858d-eeef6748f8b0.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 0x6742bf4833ab562a4fc30bdfa0e8a5b66e7993c62331c18e3a03d28202ffab92. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/QZFZ71917935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbcd49637d9aec862247b309f26b66c448237a18a4b8d134346645c1b80ea54c. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZHNC2009058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949fa9b3f4dbd0cc111f7a2dd34545791a7765de16906b09bfabbf54ae15f53a. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZHNC2009061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8958079e64dd9516bb0a64c0e4f122d0831e243354bbacaf8d9330cdfd76ba2c. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QZDA62105252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9313cc4b6f70cc41a2ae595c12754b27db23ce6d4b56ec65d9153b62f61fd1f4. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/QZES52170517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe404f0dbf5cba28bcddea7c3061d2d5ffafcb6639d47c44d55abd877893e5f09. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHN52138851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5934d660e3192a5a442c632bb673dec570e24eab5f443389de02fd49b471020f. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:51:18Z), 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/QZHN82188623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03fdac99e8f1c1f5acd491a0dcb775004e01da7b0848e8a468b15d91371b2cbb. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZK6M2115939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c68899b54910296c501b05e8f40b65f9f3130453c03f92752c1931c2a429eea. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZK6G2189783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x269306828ec7e25367134377fd4bee87c0ea68ebda8f890c3dc18e73d750b955. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZRP42183723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c7cc59d07f27476682e4f9cb2abaad74ce6b7afbf0c36fd5adf6c30ddf1f01. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZK6J2226087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5836072f05e1d84316323058b19ee1e9a3650d8dbadcf85236d94c910fe0e2f. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZK6J2226091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8eedbe6e30149dfcd87eb2a7423000a013a3ac164b3d8ad6eaaf2ecba19f43. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZK6J2226094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e647352efce9980e05a8defde549b760f44c41d9e6c88660e8e3d2273607d6. 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/QZK6J2226093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934da6cb83933880e1a521222a1e7d0a9bd2222d40b12caaf8dbce303c9d67a0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZMEN2334341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9111c1f70720b15a8c93d4bae6085d2beff1518cf0818ef809b5227c20dd518c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZMEN2334342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0974dcfa2e2c39da20030f15ec5b3585950974c13c0a739ccaec62ae6cf2899f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHN52372182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e6fb8ac1053dedd8a37be0ce47c94a3a8d3804c5bfdf912b85ecfd40cee003. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZK6L2358528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d70723b4c008bcaf7d54a3e61744ac0bff2f334113d6c3ea5b5a0fb43b5e007. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZMEN2334343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1036155b80e826b2419f896954f270edd2af9ce459856e715c5d8c7b77e53456. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZMEN2334348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c097ca12237a0261e7e24a317ffa7d5d9871f98ff6dc64c09a1b491c01d4cf3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZMEN2334349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda425a6e65092a43eb1117d0d8954d5dc2a56c037285a90441e19b79de77ec88. 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/QZK6P2563388.