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 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 0x0bb519610540e40c9facf84fb8f4f5d65c7f15f7baaa5cc8f648b1d23e16b589. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bc536afe-4eeb-4723-8002-461dae36f920.json and https://artists.proofprofile.net/proofs/artist/bc536afe-4eeb-4723-8002-461dae36f920.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 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 0xe8ca33b2eb572839dd3f1e5e0c479f239d79390926f0df7eb0e3f933483d7e2d. 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/QZPLR2476018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8867267ea6d23ee84a48e28f62e9020a7e5e768994af15a9e4845b6626973a80. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/QZWV32440638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542a2935fa8f82295b1becefc12eeb0eceb7e5d0aec576adf60640afe5b21268. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZW9L2359407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb58653407cca2c34877910d10b98534826b825e69e88e093b13c93b99ca957de. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/QZW9L2359408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x213f882ce325e035f00ab6001a5fbcc3f68407f45a712511526d313642efdba1. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZW9L2359410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b92e848540402997e9cbaa0998fe3e67b089e902cd9a7720f65e512cb2edb5. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZHNC2498712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc2bc4863f8e3defa99f391e537c77eca6389b7056af06c311643676d3f7e05. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZTV32341927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb134f04e2ec06955d4ee50179e86f09fd9379c88120516af8cfae5a0542ae49b. 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/QZTAZ2469492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f444a0470136730c778c5c624bcbda2c265e2bb7cfc561e474da51aedab8eb. 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/QZTAZ2469493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66fbb19888fafb11b2f0d95977d5117901d2d8b0c83a961f868ee8ca92a4b89c. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZTAZ2469494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e54fb83ae5b257f185d82bb49f454e1ceb5a6aaa7dabba6f40a5760b731cfe. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZTAZ2469495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f23f11fe321534affbf730d59bdf96a27271f8f8e52abdf0b6c6b396c9569b5. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZTAZ2469496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ca33b2eb572839dd3f1e5e0c479f239d79390926f0df7eb0e3f933483d7e2d. 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/QZPLR2476018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb29ea8944fbd17e53c16eacc0361cc485cf2956c1c4730073c899ba186c680. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/QZTAZ2469497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d9e31937bc822c1f6d322bb67f1eeeb08d012703ac837261fccf8838a94a84. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZTAZ2469498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7592750c9e95ec7574ecd55528c1f3825daeff899b5d006b4aca805ee88de3d. 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/QZZ7Q2450570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88486d1c73a08b14af2c7f9a1f5667b9ac3af909f15de99aa528c62cd1d22aaf. 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/QZZ7Q2450571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec7b54530c3d20fffa32fac1556ab14448b98d367a2b8b5eccdd89bc5bb0b3a. 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/QZZ7Q2450572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b542c4ed5294c61e86246ffc69d94e5954e452f7a7b6ac0cd91048da1a86ee9. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/QZZ7Q2450573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143f5be9068d6ba28096d404156b1d802c61295561a0a61d8ded424abdd15b5b. 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/QZZ7Q2450574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe407ca284c1496a1b7aba11f696d8f4309f5409fce70f96b4ea6dfde59de37bf. 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/GXF9Q2400326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad85fba4444834d34d433151be19adccdecbf51c115b9dca64aae33d14b79b29. 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/GXF9Q2400327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb9c95494946ebc9c252375adf510847c8f7fbba79416f5f6ef52b7b9d6948a7. 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/GXF9Q2400328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26469b941c5a39ff9dbdf9fdd78d54bed479a086f54dfd1e355b26d28b369c84. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/GX4R52406320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac14b36a54e9378c3677f87eba0a7353ea3eeab2d4ef297bfeee917ed514ba7d. 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/GX4R52463532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad758b1dbd59095dc6a98a7d093d99806457aa13be5609127224fb24d3c40d95. 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/GX4R52464818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2ab55c8f1fa4ba77261a7cc461905020f2b31b664ffc30d43224baf54c4ee1. 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/GX4R52480958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5fbea96cb3f96671de87bde83b0dcd3d50ece93bb0710164beba27979968b8b. 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/GX4R52409635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x795b895a394698d8d6deeca85451c9c9eda4e315822f6b2ce5a1113ba2741d73. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GX4R52465348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137a9af7bbac67ef656cc271bb536a91a6679869b313717a7ac3bb4b80033298. 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/GX4R52415404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b24dd7bef835007f4e7f5ebff240cbba2b00b3437d788907971ec221f250237. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/GX4R52426960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0155765c5ea7d570cf24c9a1233e982e409919502985e42a76e3f380807c00. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/GX4R52489519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35916e31c05b6b5409af7c9b4fb61eba762efc8274a2d89f4320b1ace84b171a. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/GX4R52414638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x788824a5b06e233c657d0d2908c20c271373e4ebea9392fe86b66adf290991c6. 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/GX4R52432047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe795c1b12047f6f200696ff0faad2bb126edf87d21357d02ae005bfd5cf24c0e. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/GX4R52445059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9132452b99e28b672db80e1369a1a13bdb2fb60d5086a69cd133da4a30dc053d. 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/GX4R52496172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9256bc25b266738b3b9bd4e1b0f16834ce1b4c7233c3fee6aa402eab04549c. 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/GBEQT2400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af2cd95a0f5403194166cee23081169a5c647f496ed4046615be8965f0315cf. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZTVM2328105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de78ada88c80c180364448e5a31af9fff0aee4f90871ebd571f81f14ca88d29. 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/QZN882533539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f479604afaa542255d44b1e6c8779fd3ab56aa4bfd9f535731445a24aebbdf6. 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/FR59R2588945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40fbd8c84a8a7acfba2c3141720c80d41bd489f2a630879ad08e20072c407d5b. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZWV32334317.