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 0xc4c2cc8be1881bd226c5ffcc6f852a6c58b6a6e574f08431cf0db75f192dd47f. 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/29f4a9d7-299b-4672-b358-759e63f17da1.json and https://artists.proofprofile.net/proofs/artist/29f4a9d7-299b-4672-b358-759e63f17da1.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 0xa9373097a79b88a5a2c241692a3ad838c8649d929daeefe30cfb9900b6192550. 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/PLF242209820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3d09eb2e2e9175e1ae49da761c1d5a687111d8534061827ba266b047f13fe9. 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/PLF242209882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663a060ba5868f4fff64bbe25f572f566d23a97152b830180e449796df101ab3. 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/PLF242209911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3193e34449555694d639496d1ead40fa3b4b038071f06edc38eb8c7e285d9f1. 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/PLF242209950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a788e49fd9b90ccd69399b4ce39cdf4c5e71fc41a04510e292d368658bdfe9f. 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/PLF242209943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9373097a79b88a5a2c241692a3ad838c8649d929daeefe30cfb9900b6192550. 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/PLF242209820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb7aa95c57148929e63aec3e1335c3cee45021193e1fa11abfd0c52667e3a91. 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/PLF242209944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663a060ba5868f4fff64bbe25f572f566d23a97152b830180e449796df101ab3. 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/PLF242209911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3d09eb2e2e9175e1ae49da761c1d5a687111d8534061827ba266b047f13fe9. 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/PLF242209882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d7abb9dcad8aefbe211eee6c24888a544fe548fd565dbdd351152c0d7aa77a. 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/PLF242209945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80b23ba8c42d741ad40079413c927f80862877eeb4e8e97e7cf394b50c4e77b. 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/PLF242209946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432e131399c13444919686efafb6db28cf746f6b8037787aef8ca2b12bd14cf2. 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/PLF242209947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa872accc38cd13f38b25279a593163fbcfc0ed9d9db15ce22dc7a5b4f9bae5da. 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/PLF242209948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bca7f3e957eaea42f3ed912413a73707beab6d23be3391a376512c17c9a69f5. 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/PLF242209949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3193e34449555694d639496d1ead40fa3b4b038071f06edc38eb8c7e285d9f1. 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/PLF242209950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x474ed89ab93faf6be395dc101fac208a66c098e56999ebe749fcee32be08bf73. 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/PLF242209951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d70ec4f620ea99a45248f194b1c46cceac02fe0378c32c57871968480ace941. 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/PLF242209952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a817c782d084dcdfe188584ee292ed4ea5746512d35305f61c17ddd159fe91. 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/PLV402401810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ffd3c4640ee9a35628a42db6c5a56bec752907e15853cb44b289e85e36aa450. 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/PLV402401795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644069aae5fa3851c78bd43f0e55641a07027dda8fdb3b0dc27e8398343426e9. 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/PLV402401793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a34d434f29b770adc1a32a90829815b355c9cc92ba00d04cb0d1a51a3a222b. 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/PLV402401754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd366d1415800de44365cb9ee137b73ab5f5564a978624c8e5cb592f00dff2860. 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/PLV402401798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf223cd3dd7501f777d4d972257ec821a4498ab30d720d76fbc41dba160862a5d. 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/PLV402401799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a5a7a35b9bb4c29afe9eafa9bf76b13430293e02739129531589b73d3422a0c. 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/PLV402401778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f1538aa0516f99cadc06b5dcb860a4f641dd8adc7efcaf640f755fe96a3d55b. 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/PLV402401801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89572716ee227755a8500817392a8896db72cfe3847ff8428b65966466933fba. 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/PLV402401802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x344033dc5c7cb1aa6df6bc43e48225939b513c838411077c55ecebd084d21c7e. 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/PLF242210735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c261481f869e4ba1094a644a4b7020a455b8c2586fee0e068539c15e7dd0635. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/PLV402401804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644214f1b0d2dc81a4e4e11f7f613840deabf005bf1bee881afd9132939e2867. 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/PLV402401805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b97f8dfe73ff0af8d8e3e98f60358fafde88752ed546def6df0b4fe1dbab72. 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/PLV402401806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0308a8afffce8bc7153ce9a4b46a3fb4e1cc854a870080e34edf8504266248. 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/PLV402401807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15746c6a7e2b23d88494aa3cdc29f310cbd34e5d472dffe223bef9c63567fe08. 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/PLV402401808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f588f9748d6567782f85eb2cadd63bcbb27649274a6bae609c881ccdcbb4892. 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/PLV402301714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a817c782d084dcdfe188584ee292ed4ea5746512d35305f61c17ddd159fe91. 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/PLV402401810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b13dc286fc2aec51d742e5ab2ab8a459ff06cfefda15a85faa1d26ee62e30f. 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/PLV402101642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6380f7416e57948ffe8ffd6bac12669fc90668e51c194be0c5be0c55ecbfb88b. 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/PLC062241374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc972d3928a52b99b84f6b809dfe7d42ad6eec37fe879d15492b39ccc67ba1b0e. 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/PLI366864850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x129b44f3d95727ae79008b7aa9930426c0c30b7c95b1a047c029d4e4f8a7490a. 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/PLV402201729.