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 0xa8e7ae7a2d94e63c6da6a2e93eb6815a940d6db6a91e6f7a17691f19a1de9e97. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1005a555-61d9-4d71-a36e-098e036875e2.json and https://artists.proofprofile.net/proofs/artist/1005a555-61d9-4d71-a36e-098e036875e2.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 0xb85bd0cd3b36af992886401ac24fff0cadef161c426ae62d965ef82575f477b4. 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/BCE7P2400835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605f4741f397c02610bccbe361bb0134ac464fbf2645dfabe61863ac4dd86676. 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/BX4IU2404357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0c4a2d25339a99dd77ee285ebb258f3341cb28788709b0458a58163b9b27ae. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZEQU2222693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1297f7e6597e3fea5dc281ea38a8d0c31707c993d0503524d2e4469678e7d39d. 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/BCIOS2400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276f06876607e4e5e6175ff06964dd76900049a10fca04b7ed16a7ef4bfc6a24. 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/BKHZ02400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7caf61b9aa26a2f8e9bac69a95fd1a1386c84b37839f66e88538ae2ebd4c970. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/BCXF42200029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d975a775f98e60481ef74696bc4055c8bd0479d154fb347773bf0d8a5983d9c. 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/BCA2A2200141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d82dd4f517263fd04d1c62d4c31aae1a02d725dda720deea017bfdda2e85a4. 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/BCE7P2402000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22858d9d0bbfacd9feb97bc4e9d8040db48c6d82c4ec135a368ce5416605b178. 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/BCE7P2402002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53da975944ab1ed35b0b4654981c9095a91620fb3a14d3e3fa028eeda216a651. 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/BCE7P2402003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85733faef466dc76059764aa0ae733c681d0395ad8d2fbbf26caa655c21bdcf. 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/BCE7P2402001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d21bd6965dc699cc80c1ccc248af39da33615c3e644ac80323aa6ee8e8155a. 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/BRSVB2401448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e34a96b0bbbd981ef48432038cafc03085068ef44f14a573e0f6ad297890bfa. 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/BC8AN2100029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5d758b1ce91b4ff97b0bc3c8858b83a633fee72d01e470da51b0b9c6cc3ef3. 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/BC8AN2100034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c876030321b13fdda62f42bb4f1ec31ec0bc08385d8c568136ab9b4d9441c50. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/BC8AN2100030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde1eb80fd11926b0e6f091f6089a6fc116d855cf01091b342f74d821a7cd504f. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/BC8AN2100031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc3cbca7862675d45364ac6547bf458142ddae6ffbcc40617d8742a4768f3a9. 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/BC8AN2100036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d868dfd49929d32aff4fee9974d5136e7c4bf020c4192d3588921304e15a31. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/BCFCV2400977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe30b080d2c21654fd5e5ea5727555667cac057ad969ae596e971e2ebb6afd0a5. 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/BCFCV2400987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60701cd92cc942e59b5082e18aec76f8fc67a73e25dd19a79ddc06f1e4217d5c. 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/BCFCV2400991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5e4a5b36cddae9dd3d0c46046a153a1f6a2c833e24d6905ecbf04d92837091. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/BCFCV2400986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f858fa932a94c44c0222ecfc47d7e3a3bd99b38a810cb8b2af83e712d5932a. 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/BCFCV2400985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf77401715b208cb6f0a08bcbfa5e555fe07c751c1dbbdca98adb20a24cefd733. 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/QZW9K2265365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154d2d36e9235b12107c43b8828c21a49fc615d1bd07ac7757a52994f90b71bf. 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/BX2222300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b832c90d121aae661a3b43a4b0c2ff26c556459a7a8ac34fb3d3edb90698737. 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/BX2222300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbac0aa62501d761fd08a4ab66f12fa26b734e2ba67cdc02f882c913299cb7ab. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/BC8AN2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacecff33df71635ae28b5fe95f66a9eb207069adfe4b5c190c43126d6a1415e7. 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/BC8AN2200046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3a137e7ca043c25a9b3d651ee1c2d994fa37ec661775c00fce6d1580bf054b. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/BC8AN2200034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b1a4e1f2f9a40d4bd4a3b392a85a940936b7ed16aa1896c640f152ce5054de. 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/BC8AN2200053.