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 0x52e314f778fb503271f6143654ff899ce1a5410daff4d7f2405499fcb0a4b598. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9d6e4f3e-bf7b-4d07-b546-5d471950ae94.json and https://artists.proofprofile.net/proofs/artist/9d6e4f3e-bf7b-4d07-b546-5d471950ae94.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 0xfe158e22dd4499ab81cb686d2933d74647ca687fedf41d141edc361456679dc2. 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/QZDA82306652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d2df5ee9535ffabea5c47ed86cd026b274e6b5063d0317d04fbaafdcc522c7. 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/QZK6L2330893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dbb5977365be34b561bc53d0e65b371532b68dbe4bf78ead78a162b14cec7b8. 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/QZK6L2330894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686728a7d7ed5ece65c5587be9363a3f712ce8c1862567252a37d51fed98dbfe. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZK6L2330895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9367fcccfcbe9fa22061d5262be3f8c5561d3ac3b599b09dfe6f4121bb32de2. 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/QZK6Q2229868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0239b46e64c46deb9a92bfcfa6522a90a96e5823bc9513770d23b1adac5359. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZK6L2330896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d749c35ee5d01fb11ab0a1fd3cd205164eac7970962826bd058224392e36b2f. 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/QZK6L2330897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7f991de56bf81bbf0cbe71e1798f52da80c7836a1f1b39fc40a7f7b1496197. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZDA82373586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8e3812c8df0fef237148140d5029859c8c39e8e63632dfef73c2b661d1d062. 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/QZK6L2330898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ebb5703b46ac90a4a180d598db10d0c8909439ebf37e68f76f6155f7e24d6c. 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/QZK6L2330899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d56accc97bfa94ef80e4470dcecc3cd77ad8c3c496e72137e348733d977f6b. 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/QZK6L2330900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1c90b8a891f70e124eb7c3ce9cb9c833f44c2a39a0047c9cbf04490e04ef63. 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/QZFYZ2327012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c928798f6239842b168e93ec6fca4b0ed2138e0b83b2732082fc6b384a49fa. 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/QZK6L2330901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc542684de9b894c333d813f2c0062f5e6dd7d361c9606d69437b3139584d4f3f. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZHNC2203414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf9d1f96e33ef6c5da26005396fd9361fd3e0361aab96c0ebba240476974467b. 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/QZFZ72427808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421a199b35f93e9f4f1892bcafd09d2a17d0a5b0a36c6331f7f1cab563076c2c. 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/QZFZ72425587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce13dc56ba60275fdeee94e4f11bc3c33b3d7475b4f4f5152c5b91b436ac9914. 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/QZFZ72410800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae34e71eb771a0071abd66eea0b8340d344b73db6507fe69bf5c640d4241e7e. 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/QZWFK2378374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b980da8c4b9dbd931aaf06dfd3399ef3fa23a5ea70cab51648e8303c815e5b. 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/QZTB62332828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7f991de56bf81bbf0cbe71e1798f52da80c7836a1f1b39fc40a7f7b1496197. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZDA82373586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79581de6ca21339843e3dd83e5abf883acd37e9be321526a1943052dae05b037. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZFZ62304944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3c11948bb81c0721b5555383ea455e37af60bf103e2efaf77557faf5c5ec01. 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/QZES72346481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320850ab47c416d6db3b35cd75dd141482c3b568e9c8a55427be0a5d1473f1a0. 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/QZDA72325126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1c90b8a891f70e124eb7c3ce9cb9c833f44c2a39a0047c9cbf04490e04ef63. 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/QZFYZ2327012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9367fcccfcbe9fa22061d5262be3f8c5561d3ac3b599b09dfe6f4121bb32de2. 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/QZK6Q2229868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc542684de9b894c333d813f2c0062f5e6dd7d361c9606d69437b3139584d4f3f. 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/QZHNC2203414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81dc0a6b2ee627720c8cbeadaa1662bd36f5f478d73974a7e35b4f3b567095ae. 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/QZHN32223125.