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 0x07bd4f7daa75e9cb8b060cc9f04538d2492e21abc24fdcf610144fc6f41e988f. 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/8a3f4dfb-2893-48b9-a396-52bd0bd5e780.json and https://artists.proofprofile.net/proofs/artist/8a3f4dfb-2893-48b9-a396-52bd0bd5e780.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 0xf3103dac6bac9ba11a59f764979c1d19117088b162da52d31901890ed2131dff. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/CZI360800251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7eff4f18fec1d787afaeb8028cb3349fc6bd676ba8e21f8dab0ba48cee6b118. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/CZI361900019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9379917a7fa52bcc3a143f1b256a828d592f05d789572c1fc12352a1c12ecf45. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/CZA250100699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce62068d48b7dbbc332f1c23235c31eb685eb53ed0c18466eb86cdcd1342eca6. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/CZA250100700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c7ede1c2f1973156f6526221e6c80f6b73379755177e9fb0e3c187f53f4278. 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/CZA250100702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd81406cd05d859f12e70bee2b996f193af064bbe5b0e14d2ea9526b2e62c9a3. 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/CZA250100703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d9a319cdcdfcd3185cd458439388bcf2133b2b5eac055310dd6ba88d620d68. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:39:18Z), 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/CZA250100707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48eb04e38ee98c9a5c2d24cd8641b0800bb82ad251a892e802e9ef23f9fa0a22. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/CZA250100710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2494b471922630d5699978054e060b0aa02dcebb0ddfc1f0f54a57f276f3f9b0. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CZI361900028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fec423834b727fb978c4991c219209d42660d645c2bc6f422c9dee974191d27. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/CZI360800262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8badaba17d66c0554c1075f91d51c94b1e69be886992d4187bf89b73fc3bc0db. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/CZI361900031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97ec3c6115d0a59f1e60dd729b1d18294bf5ed05e4c5876e1a276fd385b9512. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/CZI361900033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833151b72f107d51f0c36b010bf56dcd42e58a588b61abfeba4ff098826e57bc. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CZI361900036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c5938f8e9c40d3b71df2f56be9a992f82e481aadc65c4b61f2611d3fb40cd6. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:36:39Z), 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/CZUM70600036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a116b39ccab0cc3cfc792bee3ade8dc9f5ec4aa030d1bfdd545fd25f755ec9. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:47:43Z), 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/CZUM70600041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x722605ec3f3f76bc9c0f9965d75ae78b18ae0e17d56b0ac3a666222cd9be2c16. 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/CZUM70600039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9350766ca1d9df3e8e7512ff0eefc4b2ea28dd8c67f00626f4114179829d9bb. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:07:35Z), 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/CZI360900211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36325dbcb848c7a758183e771d10fef8da3a47b6c3f02db222b2a29ecbec087c. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/CZI360900212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dcbc030e7a79bcb1f6eafbcbcd0b45cedbaf8a5922aebe75bb2f3746dda4c99. 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/CZI361100273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d24123e17b74dfb511e2a8a982db66ccbb60f915d712a170e18793d25820be. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/CZI361100275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8999c6d3a31b7b71c23c2a6883e84ad3ef99ceac241ddf575268cf0f182d69e. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:21:45Z), 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/CZI361100276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05fa7cb21a65cd66c709b691a444ddc8d177bb382637a1b51b160889ac65b9b0. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CZI361100280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2457ab6ccfba5ef239189a04938abf2c0cff2059591be6401af277527531d632. Chain 2 (Bitcoin): anchored in block 957647 (2026-07-12T03:57:41Z), 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/CZI360800269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x052f4a74e449e0b0fd7bd51406aefaf9723afdefcd6e782423d2e29465d2588a. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/CZI361500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d812b443548804fb0e52e917ebdf4632a723a4a8f9d05c944475283ea126f59. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CZI361500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ebe40d5cadf9f91aaf0dbc37c0efdb26d35fd15310a22fa3dea6ab5189d0a0. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/CZI361500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410e12a04824f150b209cbeb5322355e59599915e156268b1b4446fb0d6382aa. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:10:08Z), 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/CZI361500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0786140151933bd427c5bfd7ee7e97e7e0410d0edb389296e73648257ed20b. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/CZI361500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38cf427c49b6e3df259c3110e6b8e01201e54071047b29dd6a5b8a311a17bd3f. 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/CZI361500025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a8b48801918f748118b0bfbe72bdf3f8671c1472eafc2e6c0281234a4394d9. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:03:02Z), 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/CZI361700026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafbe01f8ea5b2702eb763c185df15bc536114168829504347e5c7c3b4201a642. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:22:46Z), 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/CZI361700027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d672e9b440cc66fc256087f26327825a082ab5d03636f0dd625c6f263492d4. Chain 2 (Bitcoin): anchored in block 957835 (2026-07-13T09:48:24Z), 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/CZI361700029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebfa6fc440ad0bdbe0e6c630016fe3474ad1243da963cfe0e1943d36a9ced07c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CZI361700030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd3df966617eb48dbffa47ff6eda99bdbaf2b013f02c1d7aea2d330d8a124fc. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/CZI361700031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f2280f9cfacd99f4e2c6202a467136f8ca21803d5b5ebac7b2e6b63f6ac87c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CZI361700033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08031ce26984ef4a240cdc675070b38db38bd56c0f66499116d75d03171080f9. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:24:32Z), 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/CZI362100185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e243203a680094ebd4ce7cf62044f1fdb163f1a8d07f77df80bc18f029c5f83. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/CZI362100186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd017ead35a721ae5599355cd5741129d95918b120480f393e00a790f9a584541. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CZI362100187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe909eec8200d6a20943a4c690aa9e261ef6277481710f7660f536fbe4cdcba5b. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/CZI362100188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f12691f03e24676f45cc0150b4c768213d9c73baee0db65a9da23db7d4ab3b. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/CZI362100193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679e312af352af250987bae0d501f384fb44205e32459c9e0677a3297434269f. 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/CZI362100194.