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 0x9a667bff1b212ebec6b89513060bcb93e45bcbc0e167fb03c49ddfe748a6a33d. Chain 2 (Bitcoin): anchored in block 954131 (2026-06-17T19:19:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7bcf49a2-5353-4157-86ed-9910c5f6c9f9.json and https://artists.proofprofile.net/proofs/artist/7bcf49a2-5353-4157-86ed-9910c5f6c9f9.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 0x7c1cb09594ae2d3058f0873f6dcc224658d892c0818ccc5ff2c730e5c4568be9. 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/GBLV62105369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040e25fb8192ae2ec39dc0a57932b14d58fa710492ad79fd83931a9a9bb9239c. 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/GBLV62105371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f98f956407713000384714fef9db0aa8993e6b6072ee3027cce2bc9d1b3cc1a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBLV62105372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb02734df14ae60ed2e8f5066fdde1cb7016b734d6a99e1093b003bb8004a889. 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/TCAGW2396883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200065ed5b162e807785064b1b6152bf4e820a9d7009d6ca4c99fb73e5bde67c. 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/TCAGW2396926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9beea4a7a0912b48995b3fae6185820e14093c70437aa09e3bf90639fc1ce0c0. 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/GBKQU2448666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1366a8fbbe9b4aca92b5ff0d09ad561b95a9271a5a1d918621e4fac8fe25fee6. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/GBKQU2448664.
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 0x582ab6ae87f1b14fb3cd20b199efc6dd75c55822135cbb1a4549d24eda9a4b13. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBKQU2448670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3079b2fe7d961ca063c77b833ad0efe36c41820f9ae14fe173861af35584e08d. 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/NLCK41065895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6fd797e0009fee657687a81df4ee420fcc4edcba966c6b399d3cdea37f6945. 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/DEPI82115362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe32891c4a32911de26b54a622dacd33d2abce7c1424ca53120cce8e309f1b84f. 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/DEPI82115366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b374ce3e955a5233e30b75451e805c25afba7dadd6ebf06cb23f5ace0c2ae52. 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/DEPI82115354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ddfdde0f86b606dc92a99d5e168eaa09aef921aaa978e6d035f17bbef08973. 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/DEPI82115355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0af656c3f4579e8845e5e2e86c4eb58bb272b3990314f8e9160960982fe422. 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/DEPI82115365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf41112870058f1dbabf02d8585ab215a4e0eceeeb76c3433bf70d0473fa74ee5. 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/DEPI82115369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80be95547eddbb46fa000ae53b73f84849253ea3d85322d03242df0f334a50ee. 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/DEPI82115364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33bec0112f45c35e339f5a46f08f0dc813203cb8008527111447b2307efcbee. 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/DEPI82115363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23abe3d167a66e0b16322525fabcfc948a57795c0438dc3672d670095c2c6062. 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/DEPI82115368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4724e58f9d009108befa678959a155f44e0b6064e6cf72820c8053deaa0f1e. 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/GBKQU2423544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9103efc126830e51b2850136b7132d4ce823607fc4a8430b2fb41d86f90ef796. 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/GBKQU2423545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68a7af92f991d2e3f5441f52ff8c524e13106cc3f96a2161f3786e7bd966b7d. 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/GBKQU2423548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacad925f67cfab8ac2d214519fb6b194337bf6d7e6c1fc809926f040fc53b3b7. 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/GBKQU2423550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92376a92f5c4d960616c6bdac9ce08674ce6c1c4ab3e035007029b6c97c0122e. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/GBKQU2423551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02dc28e8f6adb6f758f9b43434a4a1a719b49bf776f5a9eff7219ea2c5978bde. 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/DEH742311986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd72787129a09f6067a77cfa6a3145860108df4978d703fa19452ceeda12f5d21. 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/DEH742311987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7822cbcf46cc1cff14f180bbd9df30f3e237733af375aa3bc3ef1633645b71. 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/DEH742311989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fcd85d38c0cd876193d8b36a8a59bf3d0825e4cca44fa3ba3ebac6abd988c78. 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/DEH742311990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c1266c692348701232083cab8fe4e203500affe8d9c2a79118a0ce75542363. 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/DEH742311992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c046d4b309d89e4e354ace985bddbafe510fc47e3a5eb7b61e5e899028be53. 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/DEH742311996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ef44565bb5b5c77772c6412922e63a4f9e0d82985a2589a8e1b684ec5db8d6. 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/DEH742311998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21fc0745ae92f8d6bfefff7622d9dc6e10f382479c4321a927d68c3050cef5d9. 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/NLC8K1400439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe153d78d894e228732f63cb5b15e9dbf3ebaa1ed71ea736789904c72f846184a. 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/NLC8K1400433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x613fefc72e4d0df4e6bb3c01115744386eeccae8a3c495d8ba17ee23574212b1. 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/NLC8K1400434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9e815009edd621ed3aa674e27095821aff66065709dee1a0ac264c18322544. 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/GBKQU2077383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd339e8ff980df3dc9cf2ad724b2d1d0ba0fcef651b43099c1d53f4a8358be4bd. 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/GBKQU2077376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x872019ebf766845a36e91f18da6cb26b7af6454f1392643f7ba2647b0e4a90e5. 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/GBKQU2334008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f66bb8c32e12be76a3879e1323c3ca176f5addc8104eeed16c04e9b6a396a0c. 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/GBLV62306695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a69e6527e3b605cb511ed003589d3c7648c8ca91a3ce52095b78dd02f590f2e. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/GBLV62306694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40e980fde53f4912efb408fce9e27802d6c38dac33148f68659c3a0f2a6d925. 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/NLCK42224807.