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 0x0139598fc89509e5b005d5cc79cd45b49ade20fc39b8e877d16ae294d562fc70. 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/3e0578e8-4294-4357-8a0c-f0342cefc5fd.json and https://artists.proofprofile.net/proofs/artist/3e0578e8-4294-4357-8a0c-f0342cefc5fd.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 0x7bf5490480ade27c971860529ee72011debc8c2d7006a46e82953e515e5a0a87. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/DEU160801212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f191701fcb845538befc229c7ed8b8812912a200d20e69390ef0b9ffd95a2c8. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/DEU160801214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c6f06ec10798d60742cecad47d4cfcba14505798900c62290a4b0fa6f20109c. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/DEU160801217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc54fdc960a32ba6a9da111d1c840900291621f67fe498b26f00b60de38ff959d. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/DEU161001901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba617f59f9f0cdecdedc64251ae7941e18eb1277a4a530462f87ed7e850bded. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/DEU161001903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2d486c4b11e7b0236ee3a78a30f75ab4b2d167ffc39a0a4c54073411e1a9bb0. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEU161001904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9e2791c9121f7cfac4d71d644f122d342e806e354b3fcfb18475da7eaa8729. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/DEU161001905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe532a97de9842729de12da8e41c2cfdc29b6a20a2e36307e305123390e0b5ddf. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/DEU161001906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a39d3a3020d076b05a1637d4eb2aabb00d8f3916bdaa42b4be78d08d2c6d6ff. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEU161001907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ded32fd2227c570bd49430ea7bf4ac0c3ce86af2c517a7ba59fda215d17e1bf. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DEU161001909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb5d3278a8bc19d812d121b7f147a2e2ff2bbd91b1d3b7e13cf6e241e856ca7. 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/QM4TW2005920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4cb4c4fa298a2359eebee45cc7ff355ec42228ad94f9d1085a11efb1e090e95. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QM4TW2005924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d79bc33ac9ac209734d55d3d5de24898bccdb38dd22e11fb9bfe45045228f99. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QM4TW2005925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfeceae8f39a3cba8d7add408702b47cb9bc43a62df1e9c692a85d32c34fa690. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QM4TW2022300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23e8859d427b6696737143d7cc0794ed8d49cf2eaefdf47ca17d1f0b990d2a4. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZ5FN1815350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x385ad16fd645204c466506c4c461cb085c67d42ae171aacd36fbbc92389fd285. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZ5FN1815354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb416f2bdd27778cec74a69dc0a6eec766ba04c296ec6d5687df3b71cb8acc5. 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/QZ5FN1815361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff6629d95a45064f2a567a151670ca175005a9d8f876ed1c2409ce07d99cca2. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZ5FN1804515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679798df55b04fc75356f961e4646cedfee586c2a1799938fa6b3c83930c9e94. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/QZ5FN1804897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148a460705f2cb9c1ca290a8bc2de64b032d84e457583cccba06e883453df78a. 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/QZ5FN1804900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb3da18ad50115929733991d6e40f49a700ab952c0834b5b25625015d67a0a2. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/NLCK41071834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f80ebbabb6495003b42b94c200db8810c3c135fb5c111feea11975bc39e319a. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/NLCK41085241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0754f0c78c82941856fb8599b4932ae54a900f4667c1537e5590b398ef9b2e. 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/NLCK41085243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df1a55d405dec8fe2a71f1333a5601c8a0322967ce25f2ad97594b71dbac1b4. 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/NLCK41085245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf0edc2a389a20b1b3eee9ca133c3699d6180183b3180dd3b995c8f83b386be. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/NLCK42219625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0bc71c5e1f7b183a65553780d03c152e2c3d8a76b0371b7809d7c07c66eb63c. 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/NLCK42232411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf39836efc7c5df464068374b8298a13f7df7119990aec1f3cbb51e819eeefb0. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/NLCK42232412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ff54af609657319f1af69e52d6375bfd473819ed6f68bef28434b2d62d6f5d. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/NLCK42417444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e5285fde71119737ed1154078ae884c16a01a36c6b59253f11aa3c4299ab8c. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/NLCK42417445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbafeafac98b5d5f3ba2f70b57519b44681c4772e900017f98327f1ef3e8fee8. 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/MXD781700279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35962adbc9dcce365629622cad02256ec3566be191fbc736c3ed0f337de6eed. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/FR6V81036456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa1592524bc94f0d102795f49d928bb646b63b1db99644f5a6799c43783518b. 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/US4GE1800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x950b4bb6d3f45850980f47ac0058ef29500bd65584d8854a039e46a9475cf161. 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/CAENV2183586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdddc8321155ff48d79005f870d5824122b6661fc13dbe5b5ba8ff228bb7362d3. 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/USSUB2246626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5ad4711da37d906b9673c9979a7006f6d66116df9b75bb4df1b67d4705410c. 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/DEU161202531.