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 0x7472f44c0331ddc273eefec7583fb91455d70121d6d0e9c4db32c726bcdf70a4. 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/e9c9890a-2ab2-4080-b03e-7e3ce893d636.json and https://artists.proofprofile.net/proofs/artist/e9c9890a-2ab2-4080-b03e-7e3ce893d636.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 0x7b9cfa475e9abb697d2dcc66ef354b954e4d81248753f1f5d9d4fc7e8f547913. 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/BRC3V1200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a9e1f6a88e5ee9a154eb767b1d65607cfbe365cea78ab899c88663266addf7. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/BRC3V1200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe100e1053c9b65dc1fa77643bce3ff53bbdda47d7488abe3a235391369819a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BRC3V1200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e983bd99e2385bf29853b9b532e422ecd6f3969e5e9c612e97bae1565fb5f1b. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/BRC3V1200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda2b706646c90c3ccaab2759dc9b42bf4258f845e60b8a24b71f58b01f05cb4c. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/BRC3V1200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5cf09516706a0f418f0f661c16cf612291df58ae6e4e92b50c367e5ec39996. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/BRC3V1200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e142530f1eab655401d1fe2c2ed7450d5d0a5d9585c5620dce58f41ec6a6c4. 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/BRC3V1200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c80915a97c6f2858bc9db7da8f961653f1cf1023ff783adab449c76cfba762. 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/BRC3V1200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eac8b59cdec0a4bcea72511faec31fdefd1fefc9ba70a0b7e52611bb672fffd. 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/BRC3V1200022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90044ac8bab56c262127b58ec3a18e080edddc264dde7753d86c494d12e40e40. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/BRC3V1200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c7e9e31226f9eddb2645c0f33b59340262878c35df57b26b1c4fb0ad8bdf73. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/BRC3V1200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65bff546788fa124c9cd2e87caa7cfa709717253da6ec9be103edb3a190c3986. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/BRC3V1200025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f6e66ebaa9d62fda932135930eb08e890ec8d624a204d203cfe908dfa3e255. 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/BRC3V1200026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91cc8d7d2bcd2a2b1a137781da0597cff37e6f7b24d35b9b23e8ba80cfba21e1. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/BRC3V1200027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b4b8140b85311a155da209781b1b97a8a2a6b78687938ab857b476b6bc8e79. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BRBRH0600012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a1ef168fc4490f054c54fc279856352626c7aeaa6d1f0b965d5312c2e039d63. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BRBRH0600019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2dc2f6e314ca18585054d8bc990e1b6f463b1c45027406869ab4b15b7df565. 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/BRBRH0600022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb78d0164e132021063af121edbc2481f7c8bb46ab3bcb758a1c895bfdec6225. 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/BRBRH0600024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0ca77636d981c8eb7b0b70cccc45408751b2b1efb2af7b9c5bcd6b1f247a33. 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/BRBRH0600025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7303d30f4580d8ff657d42b816f550f4956f37852cd0a92c830c7f58d4cb89. 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/BR5TG1900070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6de28b70ef22acb147362b4ef77252a2a0f263c656a7d247471b82334d399b1. 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/US7VG1448152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9031a3c6a83748699f2b06a694294d720f965b8a7771f68edb38a6d5c39a5df4. 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/BR6YG2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d25b28a814b9fc4838b5cc1ac0a2428e06277c1d973f66d7fc7441e830469e4. 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/BRC1S1300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb51aa0f5f630b49a33e4f5c9c51126ad159cfbd303cb4574b9101b8d5c8acf4. 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/BR5VT1400048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d434565d4d88b81c2be08a44811448c38ea4c5d818fe158e602983db215e0ab. 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/AEA0D1843956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13452670e3ee50dc62007728623b4fe64aeb20a5b70a8d6806f744fc2cfa36fb. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/QZ5AB1991903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c8375e2343d55facb3b851b9ae7fa0634367649392c086f16de6ac236ee19b. 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/US7VG1542555.