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 0x72e6efdbbd50b2ed5a5de75d0fd8bea98ff5df45d7883c296e8900765923e5e0. 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/0b52b94c-2ab3-4d1b-b067-8b6767af3b35.json and https://artists.proofprofile.net/proofs/artist/0b52b94c-2ab3-4d1b-b067-8b6767af3b35.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 0x975bf3bcc9ed819079b53a4d774475a3fb155188e9fa41a301a5183f5bbfba23. 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/GBKQU2464677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae627dcf7a232210944a3b6d4345dd6219ddbcc82e9457ee5a78d4f4c035bd5a. 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/GBKQU2446244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c0c0762c5ac2b4f90bdb88136195f18f43832ada07b051727a36b41d1148ad. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBKQU2446245.
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 0xa36b1480c2f9dc07813fdc8242b66288917e9fb9082c95bedb3f434fa320c445. 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/GBKQU2434824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971128a69d5a424d52f4132df9bd297701f9b3961a5b297fe03c71a8b1cb0243. 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/ES94G2442004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc390998f54836a569d5390b3d44f35ec808368c6fdcabb2766e57233ed2cad52. 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/ES94G2442005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b801c1fc68aff7f133ac051b35d8cea23a278fa5d456cd8d71e7b9937ac6198. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/ES94G2442006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9ada51f6b03b0e1d46ec4c36bc4f436f358491e4024cfa15cf829611d5be7a. 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/GBKQU2407667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a10b2d646ec29f448ead2bfea46d4f668deb0ef5102c532b4aa58184381a5e. 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/GBKQU2407668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff9376800c34e28e46fd9211d6886233b8a082c795ca4ec82db1c3b6e1924ec. 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/GBLV62316494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10633cd678242ff179514ee52cfebd3ce515f048a21e6ff21b3ded1099b946d. 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/GBLV62316495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dce996c95908e7e99af98685192bb1e7192dc4d4b838bd8b2541d60154c693e. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/GBLV62316492.
Take It To The Dancefloor - Extended Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f09dc789da13f8ca7d633724c4bc10475b289b1f61810e7e4935395b2adf391. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBLV62316493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f91d54b01f9b4a9c93d5ac979fa6ec66e53cd83630bfdaf6442b8aacea49cb4. 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/GBLV62320240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b9ccceb134feed048d846ab5e2227a568033360bca44732a36c87c9db1683e5. 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/GBKQU2376567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c743e044255ad1439ac357d5548d9e2d3570a0cc8799766fee73f474419282. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/GBKQU2376564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1725f95bd1d7216c7cff28e88f10d23ceb1d3e0c30d2202b3da5a793964da61f. 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/GBKQU2370461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0384424931232a31be37b8c276594ef23852351614dfd3279bedffff82978921. 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/GBKQU2370462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554844dfbbd2fbb6f410dec5c831e254ff938afd4026b40deaba0afd77ab6cbf. 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/GBJAJ2300666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd93a6b58b8ac87d76c59f7882b50dbdfe5f2372644f3e63b2e96db7dd7820ec. 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/GBJAJ2300668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ccd0a7dbc19eb35d9657f6f28a9a55ba7afd5d0213d4d8adaf92c2efbcdfaa. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBJAJ2300665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82dba3dbf3c5b00af8319ecc8704ebe812673b14295bc347ba734b5c28dda498. 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/GBKQU2339937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60192fa0ca4ffd6f7a394dee5f82750208c6b0cf77a203cf48380b62b8bfcde6. 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/GBKQU2339940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae8e33bed313c925e26f2ec68cbb2e17c85a3e73186001a0a2ae5ebc1dac0cf. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBKQU2339938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f87e864d2eef09c21f586d3f2c564156127d26980262f8bef67724b115138ae. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/GBKQU2339939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e8e1f60193f51324be12632819dc6856f7b4be313ca227e2bd41a20c6d71cfb. 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/QMZQ41640011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c67aa85e2dec0bcd58122e99cb94d6ad1401f6315f316deec8dc59ac8c066b4. 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/GBKQU2247856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01de2f8cc12989ba2ca796e93a85c4c7e3648e2c0d1f84bf620816428043a1f1. 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/GBJAJ2200517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d15da3c6bb67f1e930e350c55751e82f54f564a4ea03669c3d0c00040fd96e. 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/GBJAJ2200520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f0d6952d0de567acddaabcdb758881bacedb95faceadf9995e1765ea423a173. 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/GBKQU2207339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5693de83c2412bca5166bdd745d1bcbf22e0a1519565d281243eb6c4cba4129a. 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/GBKQU2207340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d23a959e3227e943d3ec432d6a23b03871736a195f5efef9a0de16ac1f71bb4. 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/UKJSW2000046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2ec41620cb1a530c87926c85d511ba1ad2d2a1c0ebbb9d712376ab7f6146e9. 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/UKJSW2000047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab9302e32c079358ee3d2711a11cde15e68725ee7bbbea03d77489bd2fead319. 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/GBKQU2161785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ee95fb45750b4de66059a7de590041ae8ea045c1ea597068fc98e954b48f37. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/GBKQU2161787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa03651b8ab404aa498b591ad6795dfd4fdc6bf75e192c9a33ab60dd3fca4a7ea. 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/CA5KR2153423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5bd2ae8f9923e80c07b217e5abb623c554a1f3e3c5125cedf944471a9cfd755. 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/GBKQU2128538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d71644797c6a1caab4fdb7d24e24c31cf0db7bb5eed5405ac6bf6ee64e24a8c. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/GBKQU2128539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c4f999ac5cd83e1747b92a461764d41b489c5fac626b2b5b0d977332b35c8a5. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/GBKQU2128540.