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 0xf56518f4b4e8f8350c0eb7cdff446011f9374fdc8ab9f17693e5f807fc4c522d. 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/5f55de2b-65fa-4fd6-bce5-2e4a7f33ea34.json and https://artists.proofprofile.net/proofs/artist/5f55de2b-65fa-4fd6-bce5-2e4a7f33ea34.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 0x943958f45283b1824c3a9ea6282fa7109c83cb20f7ebff6bbef8d46c96179dd6. 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/USQX92301977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d3db7854dc3649de3733dc7c9492d334551658769b850848a1658f7112ac6c. 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/USQX92302451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0567f7177ed0628d889d5ce5dc1af98ac38ca73c7e60d1bfcb2e6c32424055b9. 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/USQX92302452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabfbe5a8f1820ee39d56b8fc1acf7c8cedbac83413e7ae9d8f129c88c77ef772. 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/USQX92302454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2090394034406fe78853978de1a9ba9e7a4d404b8f86f1d3abac48d9a70451fb. 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/USQX92302456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdba2ed06308ba9aaf56e84ad2d855273bcab7bef74076698d944854ebf4d008. 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/USQX92202807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9602a0458bb218fa85d771eee93d870e0a29e00166723666a541d234e60f9593. 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/USQX92204037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2402298c300c32676755b78cb2278b0b1cfb62d2bd7fc54ed5c6c7c24fe82f7. 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/USQX92203856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d8ca66ff8a2bb0eb72094225d627a8dd5218f48235d0912abad1a2d685ce87. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/USQX92203989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887e674802e98dae7824f7aea089163eed8f096640e2c66c5f05a74a14ede2dc. 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/USQX92204014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1680ef3c3c404022e5cdbaf1a521d37bff984303ddec5cf2b073fd1a450685c. 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/USQX92203717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5355499f4528ef35dc60a5ee496233896755734a00826ebab04773195c4cf6b. 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/USQX92204017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc53cd8554eae56edede3177ed816e205f7a0e77225f18e71fef05dda51019679. 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/USQX92204020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb328101000a8eaf94bb6ceb49500932ab080507bb042c4a61e50d124059ebcb1. 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/USQX92203436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7141106385fd8d8964f04fe41ae989ee86ee1395d0f028f69b0ca2fe980095. 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/USQX92103839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1002ebb771fdba5159fbd06785c4e86e24a30a79aa1fe56b466c27c30b0d636. 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/USQX92105833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd95d1adaf982d412b04969b3b91120a0b32631f0f9bd2de7c4649b7aad07f4. 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/USQX92105847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6523636c5cada1f53ee27497f44c724f1a1c1a9a50bdcf0b388d2a75b3a65aae. 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/USQX92104726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x891ad3ee1563383db1ef65e6f774929a619d5b2e64290a67a0187bf08ec7442f. 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/USQX92105855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa52c1e8be2208937bc6cd49638fd063ae1d0edb6b1ad43a72925f8fdcdf2d24d. 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/USQX92105848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x420b14b12ba0ef60c2598825f12c637bfe4a5bed743cc9b131bc262cd6188b68. 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/USQX92105854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1602bac1665bdf99b897b91659530b27c103cbe1c9f8b6cdd4bda43e7f05c662. 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/USQX92105856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ec6fc4110ccdee60e73e36eb56781d9cef38d2b11514d7d89e3bd14425e4eb. 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/USQX92104262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8fc167cf2a783cc9b3074070fd74c035dc121b35c556138234ac478c3cfa366. 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/QZHNC2152002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d55a17371a810848bf057cba0e52dfecacfe66feb160b778851c0f03be1871. 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/QZHNC2152004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fcc1e45af736973fbb0f18dade91779c3b10e3b5aa3790f6b224acc0fad0c49. 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/QZHNC2152006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b69a9911b87e25478130686db5d26b4c3aead082183401abcbb6a793c660253. 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/QZLL92488696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b73fa7365964e28087bf8578a38f1bc119b401956b5e336e3f92dc23dfe2e55. 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/QZNN22329705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabfbe5a8f1820ee39d56b8fc1acf7c8cedbac83413e7ae9d8f129c88c77ef772. 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/USQX92302454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943958f45283b1824c3a9ea6282fa7109c83cb20f7ebff6bbef8d46c96179dd6. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USQX92301977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa53f6d537704052c7795fbf317c46e84c6207fd954f31a0132fc0901b3ed768c. 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/USQX92205851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1680ef3c3c404022e5cdbaf1a521d37bff984303ddec5cf2b073fd1a450685c. 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/USQX92203717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb328101000a8eaf94bb6ceb49500932ab080507bb042c4a61e50d124059ebcb1. 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/USQX92203436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdba2ed06308ba9aaf56e84ad2d855273bcab7bef74076698d944854ebf4d008. 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/USQX92202807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6523636c5cada1f53ee27497f44c724f1a1c1a9a50bdcf0b388d2a75b3a65aae. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USQX92104726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ec6fc4110ccdee60e73e36eb56781d9cef38d2b11514d7d89e3bd14425e4eb. 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/USQX92104262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7141106385fd8d8964f04fe41ae989ee86ee1395d0f028f69b0ca2fe980095. 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/USQX92103839.