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 0xa4a10c870e06d5d157460e789e6d6a99ce18312f51b733463f2256d4e7073f5e. 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/ce483dfa-0a3a-4a7c-b019-c05e2b146b2b.json and https://artists.proofprofile.net/proofs/artist/ce483dfa-0a3a-4a7c-b019-c05e2b146b2b.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 0xe4c5d930fb6cbd381567bad7bf4f45cd038114a4f7a6a58e1038d95591a89d0b. 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/CAN112200298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e48421ebd1c91da99daf0807a7e6d21ec54defe99330c7572f41ddaffed05a. 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/USANG2079641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ad5147002b0377076a2bee852a1130a0575253d3017c2e201ff7164d748123. 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/CAN112301805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec295945e3b69c81a0da09a783014b83e76ac4588d6d6127766792e91a5510b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-22T05:37:07Z), 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/CAN112400336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1492a884de24cfdf9afdb10e2cf790ac85eb694e3908c988f8695c15115841c5. 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/CAN112400340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4c0539b19e664c08cc3b87f40cc3497375dbd823fd6f34a8c5ea6e04534723. 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/CAN112100235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea98bf359e12d548c9ee61d370fecbe736030885e673e65645019507de76ae4. 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/QZK6L2052290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3269cf4ba76367f638af195836965b1c7468d27f4fbba1a7625fbbfb066676b. 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/QZK6N2082384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb3c89d3d4ee9fe58e5c192936cac05f81ab372f180bcae70ab5bf9506ea9cb. 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/QZFZ22107423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c83580133f93ae8af06b1134786213655212d2f61869577d838efd45dd4d057. 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/QZFZ72184265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7929dafbcd047361261349e8ceda2c194026008719decf1187241d57a592b130. 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/QZFZ32158259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea2b98161a6d0de79172aa78f93c89c104f8b011df74f53fc9b5a0f3ffb7b91. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:56:27Z), 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/QZFZ72184268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62bd36c66199f82f01875007303dd1cb905b0fb4e0e2ca04f44af457d11392a0. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-21T17:00:13Z), 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/QZZ762435528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6261db1d212cf42a77233619f58686b123e289a9634ba27ee444f28b2903ba. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-22T01:16:48Z), 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/QZZ762434230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6568df4848c8a6c711b7c08bf26be688aa106ce2b0c1feb91c5b948ce21ce92c. 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/QZZ762434208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee00712b3320bd1b5285d6da750e4506d7ead976fbe89f54e3e05a85a1eebd5. 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/FR9Z62400641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a9518c938cb45c4ec3b09745a68daeb8c873c6d218f3b3fd89c27435e9ab32. 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/US3DF2497617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8564045772e7cba4a8e27f77562898e6c8b49d280d6606eca9bb28e6f6da4e3e. 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/CAN112400962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec295945e3b69c81a0da09a783014b83e76ac4588d6d6127766792e91a5510b. 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/CAN112400336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ceb28178c2372d97acdec1102495d10f70a9192026c14548a0a364eee79ba78. 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/QZPLS2119504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ad5147002b0377076a2bee852a1130a0575253d3017c2e201ff7164d748123. 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/CAN112301805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19d98fd191d5537f09573656bd766c06825fd35010129f3697a852e0d056a3e. 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/QM3DF2215127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb06ee5221a6d0ca0c12a2b5996e11e5ade87322ee32da89c8321a9ba3ad342a. 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/CAN112300150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef456efac74e3c2d8ccda35dd9d2bf2d9b6ad1de3cc2f50b94b6bca0e9eed2b. 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/CAN112300638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed73f5a18f59dc5596d3b9f418a41e9ce8b5a04042cd1da38ac9828e322ab5a0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USANG2256849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd51f9f5cbfd3338fdcdd9f3b2ddad298fe18779fdde053431b221b294495f75f. 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/UKR6V2212541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02486987e517c1a4d787f6b680411d893615df94d0cfe5c82c9a3a5b8bae9219. 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/CAN112100367.