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 0x8755d10b329be2f4e45492d68140a96c68f306f3e0de1d9c878ede5a7f38709f. Chain 2 (Bitcoin): anchored in block 953662 (2026-06-14T17:28:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/55c28ed3-4d29-40dc-85db-71fc705aa2f0.json and https://artists.proofprofile.net/proofs/artist/55c28ed3-4d29-40dc-85db-71fc705aa2f0.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 0xa526fe2dff7e712a1e2bfb9944a4e01d092eaac58407d5d6841abf5dac48f496. 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/QZNMZ2314549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d9d3cc321eaa2a3d09e9db3405df31eaea6b3186a0e9e955783d3196cd38fd4. 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/QZNMZ2354593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb1c12449db433721b8e428a40d38bb5b48c75848258fdd13bc70feb7320a87. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNMW2450310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a0028681e4704995f4ee00872bfbd3cc59a46a22b83cf726af81c443bcd832. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/USX9P2461748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c93eb7706908b7564efa150be498de62e8738b01f65ff666a4c9a62f7314b9c. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/USX9P2461750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0466187fd641b02e969a2c029e3ecb127658b8fe6ec6e75d3038947b02be3a74. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/USX9P2461752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x651d3c8d63ddafa1289c124ed5225ae34822768db7fbc635815acc6b1ee20d46. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USX9P2461753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b52fddec18b1db0602ee55eaae07703cb35ec95e2d326a449633dce78a4eb1. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZMEV2573542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x231a58a7318e4bbe0633e932c2b65d5d7101a33cdad03754474e0e8539252789. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QZMWW2591848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd516e309dbaefe5f4fb4b025468fea7ed8adec8574eb08bdbf6f4ce7d6918e6f. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZNB82510107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb265b2ff5f28a19281107d8c3067788806a540826952c5132807ca3266bf37e2. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/QZNB82510109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50dc7b60b54997a762aed367b3d88a74c0d8237bd1c1cc26130734f7fc5272ff. 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/QZNB82510110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba28bfd8f32674890b2b0d161fa837b3d64c25bf3fcd71247525d2c044d38c1. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/QZNB82510111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce730045afa85eed73042e0ae85a1e2aefdd8721b2b035990463cbcd648680d. 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/QZNB82510112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14900b7a60f38f6f119dcaec584c373d3d166a6d529b59b48a78125e612bc17d. 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/QZNB82510113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1891ed6192b6484795a58afa93b057f10c90c85c7db5eedf4127e9d917b610b7. 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/QZNB82510114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962476e20ef233ac9d8d8e76e35ac981b5e0a0a70f6953bec6228069f83b9196. 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/QZNB82510115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb890b81dac22b7ce249a50f33a56f577f9f2dbbeb13813a0078024329776ff4a. 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/QZNB82510116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96484f13e31ef7b304b2fd7001f029c62a2a2572da5b2e2b1fc9aac0b347a56c. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/QZNB82510117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb7cd751059a885be47a5f8c53e8421a120e8065830f8712fbd97720a513271. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZNB82510108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb265b2ff5f28a19281107d8c3067788806a540826952c5132807ca3266bf37e2. 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/QZNB82510109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50dc7b60b54997a762aed367b3d88a74c0d8237bd1c1cc26130734f7fc5272ff. 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/QZNB82510110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba28bfd8f32674890b2b0d161fa837b3d64c25bf3fcd71247525d2c044d38c1. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/QZNB82510111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce730045afa85eed73042e0ae85a1e2aefdd8721b2b035990463cbcd648680d. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/QZNB82510112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b52fddec18b1db0602ee55eaae07703cb35ec95e2d326a449633dce78a4eb1. 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/QZMEV2573542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14900b7a60f38f6f119dcaec584c373d3d166a6d529b59b48a78125e612bc17d. 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/QZNB82510113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1891ed6192b6484795a58afa93b057f10c90c85c7db5eedf4127e9d917b610b7. 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/QZNB82510114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962476e20ef233ac9d8d8e76e35ac981b5e0a0a70f6953bec6228069f83b9196. 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/QZNB82510115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb890b81dac22b7ce249a50f33a56f577f9f2dbbeb13813a0078024329776ff4a. 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/QZNB82510116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96484f13e31ef7b304b2fd7001f029c62a2a2572da5b2e2b1fc9aac0b347a56c. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZNB82510117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb449803bd5a567521e773709efa71d7d6b0da795387ba15dfd4a2b2d6a9efd. 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/QZK6P2195604.