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 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 0x05f45c0996ad1463339ce110eb7d66cc8df4e4bbf6570747c59b5f34db0222cb. 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/24a145d6-c42b-4ec6-a912-294c86f04ae8.json and https://artists.proofprofile.net/proofs/artist/24a145d6-c42b-4ec6-a912-294c86f04ae8.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 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 0xbacb03002558d21c0c1579d789e58c2395c8d677b2c11cffd663cbd1fe26bf17. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/SE5Q51700370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ba7ebc4bb208156a7aaae4dfef7a2e5df4f2ba54b0c3d4ae92127ed2486f3c. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/SE5Q51700371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e005808b668a32bba48717cbe8500564e4fabe9c1e89536eb024ba4be8dc314. 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/SE5Q51700374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e9a82ded0e8028af15124a3c112046e32461df4855c2dc96e7e23f15658aa4b. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/SE5Q51700366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa596734ec43030ca136526edcc5484c26fb4d5724644fb772ecd0b2b715389c8. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/SE5Q51700367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd91fd47213ec99a2985cb9d4d4633417026737877e402a015fae1c210658f473. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/SE5Q51700811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x653f6d336464934d5f8efd97d89106a616245018076ae9c2a53a1b0be46d8251. 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/SE5Q51700812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x598ce53155a1c5a05bb1cae54bbb759a86ed36a3780654151a553fbfd1e42322. 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/SE5Q51800304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd57c7205a9e5350ddb92bac21357c5a8833bd7bce49e5c9ed2a345eff09acb9. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/SE5Q51902724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55245f50f9e0698e360dcf578024146180e9c5c8730654dd4149257c7e52593. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/SE5Q51902706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe374d361ff8da7b961a0062c9058d02f5228bf9c0d8204746ca0d44be55280f0. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SE5Q52002797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac1bd62d6fe3ebe3ed94550f4f1b32631f235687736874ef88730ce588d00b1. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/SE5Q52102401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8a36ef31cdd7286bc238e08b5b3233a35ed0c3e6261a0c05681d9635fc1e1d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/SE5Q52102385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8f98cd141fb66a23a9d6551ce357725607328af181a4542e86491b670c50f1. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE5Q52200849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70593d178feb41819f8dd13fd68e5f0706f4d3ea84f945e3d497cb519568dc91. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/SE5Q52200334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa684ced16de9f6950fd9a0b150815140b3621c9344a9470f0ef9fa0b5fd4be8d. 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/SE5Q52201286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e77bcdf44a629eb7d2b504c0207c497eea98a9306eb8f71ddffca681fca109. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/SE5Q52204212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840eecaebd4c940f0f6577f81e2b96d4861321f39f78d863fe214230d232f645. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/SE5Q52300503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36458398e47377a69e27e863f47763f57778b4f3ec462f3c02b7fded5877ce9c. 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/SE5Q52300888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30c19dc7bc1fdb465782d82a78c578be6ce887ac5bd1eb5415bebd4c69e4f66. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/SE5Q52300729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa538689543388bf862afeb31e3f5b9e31acccc9ca167e41c864e7de5ede7047b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/SE5Q52400497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3566eb86477f50e72ce5dfdbf8afea208f67c71fcc75b45779260581dde443. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/SE5Q52400335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c41441b32c8e2eab694c2ffb6360605f4a2d5bad1706553628161527f0f752a. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/SE5Q52402742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a7f4df8952c9def44545fee8612528eb4f9eca042c19c4df1021b339777035. 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/SE5Q52402740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e1b97b702c77eace637e4020b737d16e08f409d5406f84896a8790bfd20000. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/SE5Q52500612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5978679f289450769045dc16d6b03788460f71389bda0f2f8e12157123366fca. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SE5Q52501370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbacb03002558d21c0c1579d789e58c2395c8d677b2c11cffd663cbd1fe26bf17. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/SE5Q51700370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ba7ebc4bb208156a7aaae4dfef7a2e5df4f2ba54b0c3d4ae92127ed2486f3c. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/SE5Q51700371.