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 0x7659579f7b982eb27e9f484c0c1726a5d7df20238ecb60cff53a54adba95ffa9. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f4ca2ed5-db60-4fab-97b6-bb24eeab4bef.json and https://artists.proofprofile.net/proofs/artist/f4ca2ed5-db60-4fab-97b6-bb24eeab4bef.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 0xb327104b287b3273a1344036afe94883bfe22e4d049f5c9936eddb89e55d5881. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/AUBEC2416910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e5e44e91ffee624a07ff4d20d530d5eab21ef3e19798dce42f6d6ee6b706990. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/UKXN22398015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c7f543b4fee09c1323c63b8e720beef3b4fef4866b21c5c8a40ad38de2966a. 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/AUBEC2303672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe568f05f08827254f4f8854b2ed6bb74845537447da62e9d695aec29eff35999. 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/UKXN22398033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31210fcf5cc4e1f10b3da3c46a5ae509dfaea95bae01bd1a832e0ae34daa3ff5. 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/UKXN22398034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e06ad2fe2223d6d01fc37d5f710a2299fea81d73b983158c9e18c825982041. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/AUBEC2234633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13898343f0c210a65f656bea407232316ee991bcfb01ba7ddd90d4b1a07d60b5. 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/AUBEC2234637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc6a73fca45a639ae436bd4ddcd9ab841253c31d3e65f24e8a9dd4790264f44c. 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/UKXN22469422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3b3de85db851c735a0fde2c26a0b1bb888d3467310ca82e65a74eb5975fc6e. 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/GBMA22456043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f32c935050ad0777faf9ca4110dc40d3696e0b1761b146247328c4a3b99a25. 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/GBMA22456033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0bc11063c305065434ee5c1226c6a1e66f8a10d59b5c06fc964acd9e14dd65e. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/GBMA22456034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61466b137e58d04661d5aa494108eda6be47b6ca1a46b0bbb062b8d68f798901. 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/UKXN22452321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc6a73fca45a639ae436bd4ddcd9ab841253c31d3e65f24e8a9dd4790264f44c. 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/UKXN22469422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042145af5b7e7e82c98c1774e08c084be165293d46c01a18af38e512a15b171b. 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/GBMA22456035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77849c10991b159d5a9af3c9a10f3e19b177f1d2554d3e739738373a0fd7c8a. 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/GBMA22456036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5976690a996647755a7fc75134bf8156f9a71b063a28e00d2cafb58b82e11e17. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/GBMA22456037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f44c8161786999aec3f4ccec8f0781531f9eb3e9f8fd46b5d0720480d9b640d. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/GBMA22456038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589792ee98187c706f66e2ae3a156a48bc847e89045dc1482dc92539549ac98c. 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/GBMA22456039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4294c0764fc189cdac5adfdcb65eeb2d2676ba998cc18e3eb29ff83aa251dc. 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/GX3Q92497435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe62d156347edce7e0582b61ad2c140353c04b091e728232d4a78f2ede1838606. 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/GBMA22456040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9cdce21f065e62cb31b2c33de5235f4b3458d866defb370445a99087e276c6. 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/GBMA22456041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ee4f84fba2f605782d58250e77222901575155655ce194a7a7f7df9a987137. 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/GBMA22456042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ff0b23f579d6e8250921c1e1ff1f694aa1a10e67d0de110387204346211897. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/SE6SA2297365.