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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf5490480ade27c971860529ee72011debc8c2d7006a46e82953e515e5a0a87. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/DEU160801212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba617f59f9f0cdecdedc64251ae7941e18eb1277a4a530462f87ed7e850bded. 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/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 0xe532a97de9842729de12da8e41c2cfdc29b6a20a2e36307e305123390e0b5ddf. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:53:38Z), 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/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 956857 (2026-07-06T01:26:17Z), 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 956728 (2026-07-05T01:43:49Z), 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/QM4TW2005924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d79bc33ac9ac209734d55d3d5de24898bccdb38dd22e11fb9bfe45045228f99. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:39:26Z), 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/QM4TW2005925.
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 956826 (2026-07-05T19:27:56Z), 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 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/QZ5FN1815361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679798df55b04fc75356f961e4646cedfee586c2a1799938fa6b3c83930c9e94. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:34:15Z), 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/QZ5FN1804897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148a460705f2cb9c1ca290a8bc2de64b032d84e457583cccba06e883453df78a. 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/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 0x7a0754f0c78c82941856fb8599b4932ae54a900f4667c1537e5590b398ef9b2e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/NLCK41085243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df1a55d405dec8fe2a71f1333a5601c8a0322967ce25f2ad97594b71dbac1b4. 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/NLCK41085245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf0edc2a389a20b1b3eee9ca133c3699d6180183b3180dd3b995c8f83b386be. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/NLCK42219625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0bc71c5e1f7b183a65553780d03c152e2c3d8a76b0371b7809d7c07c66eb63c. 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/NLCK42232411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ff54af609657319f1af69e52d6375bfd473819ed6f68bef28434b2d62d6f5d. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/NLCK42417444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbafeafac98b5d5f3ba2f70b57519b44681c4772e900017f98327f1ef3e8fee8. 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/MXD781700279.
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 0xdddc8321155ff48d79005f870d5824122b6661fc13dbe5b5ba8ff228bb7362d3. 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/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.
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.
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 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.