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 0x20ed7ae4c752225d547cd95267eb7fd5f95a15d1e3cee737aa7e1c649f0d14f5. 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/2252efad-fc82-4f2d-a9f3-33e345c5ad38.json and https://artists.proofprofile.net/proofs/artist/2252efad-fc82-4f2d-a9f3-33e345c5ad38.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 0x9e56b9fca8a051f1114d432549914ce29246ba205d4d67350dd6c3a939704ea6. 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/US3DF2469605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd024453907ef8eeec736a42012082b7dbe15d0dfbcce7a97369028aee5f16e13. 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/US3DF2455983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e6420cc5fd6c3eea80ceee6fd8c3ec66110d94669e25bf9cc550ec62f9489c. 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/UKG8V2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b8ababcd1410da4b317de80abd511ddecd5f59cf20e99d7c1684263cdc9c93. 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/UKG8V2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487611f9ded79100c414de313a162a863df1d70aadd264dadc93c160951ae8a4. 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/QMANG2243842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd385252c456612316ba808733ec2eb54e810a3b4bd2172d8dbfb0edc3e20c749. 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/QMANG2218479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1915c97f25e19704a478b83d093c98b1ff6a49ac3a4db99725e6459d2aee7ed. 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/QMANG2213093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea32f6f07749d7498f9d88d53a7d47b8c7027e9aa89c8337dac5e60e245285ea. 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/QM3DF2200346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71da671160588b21c5c1442a90cb138a5942dfae71974389a3340076dc960fd0. 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/USANG2225009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec34e0e141ed52343ce88c84354a9e60b21a1b1c15aa399b0a801d72001516d0. 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/NL4YD2200181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95970d464b09d07aa1d171ffe2bf805ffa6be6e456c31c2ad0c3715dcce380f4. 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/US3DF2291867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e4507cbed3ddb935093fa753a4c701fb580dff4ec6e7ec2e307b9e9dfcaa0a. 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/US3DF2243496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceaa8f74e695f7b21c3bc6333f2acc5b5d74b2f898fb47be09ba401e4988cd89. 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/US3DF2219987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4f085d2bd6f16c3cbd2c48a158b585223bfb2559f6795e18b21123dec283ad. 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/US3DF2219988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa67062e1643e8e8f52192744f2156bf38a9f7e4d6d1f1e3c3e5e1b251dbcb38c. 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/US3DF2219989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c858ccc55a568345a63d15d3a130f5a32d2b611571eda7593e47c4cb6396a3. 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/US3DF2219993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e5612137d7a8d7daf67aed56ff21a60ec248eae90dbfb730c19efcdbc2a07c. 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/US3DF2220002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ee69c0740bd53098554bb9e4be939109c962c54493109ee1db60b96326158c. 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/US3DF2220006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac5a3f7c3ba58d3b1a442b5988d1fa2591d6229e2308dbf276622f53ed16af7. 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/US3DF2220008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8f6d26b39214cc51216a23fde65b0475a860fe6f3752f4bfd1c38849ee67c0. 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/US3DF2220009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x880fd62c7ccdceb1ea1d48c53ae1fd7898fca9136920566a40d7f72227ba04f0. 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/US3DF2220012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f0175798be4e784b68d0c4b19b6067615ab117a179c8dd1a6758094f8a4db62. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/US3DF2220013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d53413fbe82b89f165b6d9fd5465054153bb225ce51bcde8bee78f5bdb8e999. 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/US3DF2220014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c3eb82eb8689a3b542fb2ac13c42752d8da06c148432ae190c859910647064. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/US3DF2219990.
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 0x6df2baa899f53b356ca84995fdea585c49bdce5ee97e4f48d957f2716c04d02c. 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/USANG2201879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd352c9ca1518df6f6c7a19cde13d5e38f107b9ffc0934a896a0ef9b449f1ab52. 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/USANG2201882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038f5421be8821691c7ef4412d1cab35a54b530996764aebb50577a2083569b4. 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/USANG2201888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71354c2b199a07b7d40e9d51f695bdaf227cd1cb65caf4dea78622bb21fc8eec. 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/USANG2201890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d96eedf7bf239a153b668c5a810d66d82cd96ffdc2981360daef79663ff86b2. 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/USANG2201891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04717ca0e1ad8fced217c675cc72bf56260eaaa85172a999695542cb74e75d2. 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/US3DF2209383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf0ac01cb482bb4645106bf57830f0565830c1f5016abc1bd430a6486c994ba. 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/USANG2201917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30cf51622ff7f44c4772782314d099fd1e071a29dfae03fd18f46560c9453eef. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/USANG2201906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c018d25932f34a0da5894ced1ea2aa80c97bc205a01e62a17a9a0682ccfe7d3. 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/US3DF2243499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5dd1c117bae7866ccbe33f9fb0de77e3f1ad52babea81aa9e23243bbf557eef. 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/US3DF2243501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba558a16e804aae8b0fdbfd492c5b88fff0ec63bf13434455da98e8d3ba2e13. 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/US3DF2243506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9552ab39f66da7c38cbca1288a93d1c100f568b8a3fec3d15985e76aa7655412. 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/US3DF2243507.