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 0xc325d3d9794aa6deed5f5961ed27c4195330ff4de8ad7ade4305f4d21827eb1c. Chain 2 (Bitcoin): anchored in block 954014 (2026-06-16T22:46:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2ef52688-4303-4136-a842-9061f3635d0e.json and https://artists.proofprofile.net/proofs/artist/2ef52688-4303-4136-a842-9061f3635d0e.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 0xd410aec3bdad9b3a3ec07e27894d84dac97b95705a4d5fbba75e38df13056a7a. 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/BX67Y2500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78913802ec4c4878a5e715bf861039898d25334d03c60e0f9f3b7b1e961a9891. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BX67Y2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8d0dcc710dff4a35f1bf3c1f90a549183870622c28bc0330a84ac9fa6a3ed0c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BX67Y2500024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x420ba348a48415736a6bf4bef9e569222d4111db2e7f50bd2371f99b15371470. 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/BX67Y2500038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9614a0b85eb8418b6a254b76ff615e40e40cf52a3507fea8ef2571a4275000a4. 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/BX67Y2500023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02020f0a77ea1ef0e59010aa7b7d3a86a993eecb092bedf1b8fa48b44add54b7. 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/BX67Y2500026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ccb63b919a57b900d92420fae6d7ee7b3140b5ec3039d57a92b8592760df05. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/QZNJW2528762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3275b6b15e2a67af1745aca9303fe029a2d7f3db3a03d5bd0bea34141299f6c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZNJW2528764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132c589dc6f20c649d908208bc9901981ef384fe0540fe65dd461570e1cd721f. 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/BX67Y2500029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b3a89ff4f39a6a68858d4a75bee8d0f4182459b3cb7c31e9f4dd1f08c85009. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BX67Y2500036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b1e3db829d29ddeed1e2005bb7b255840d333a4deb096c060613750be3e737. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/BX67Y2500021.
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 0x6e8a30986512be99e2dfd1a234b323c5b8dd7cc7cbfdeae866e90a3540247949. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/BX67Y2500027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd48974329cd2bf7cd6572874ba624bc3796a15429f74b6a7cd4526aa8b1caad0. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/BX67Y2500022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eae63e47fb83d03aafc0ee4d1bf9c20d3b55772c3af0a3640eb570136dac526. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/BX67Y2500035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c598c435ced067acf77397f22df364b5b885ed7367878031754fc08335754b. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/BX67Y2500032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d6bb488e51a479f9a873673b87b816e65f0ff4d7b8311a5f31cf03ddb419894. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/BX67Y2500028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d83aa85cef83e94821e5bfa24574b180ee71b7797c62216d554c6cdd0fa94f. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZNJW2528763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86052130f622bea99125e487d740879853a2c96babe9b9179a1921a4418bb434. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/BX67Y2500030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5eae064c29138c7f4e4619798e32fe9e5a7a396b10209432cd80f8480afb48. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/BX67Y2500037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce7bcfbc93050b9fdc13c7a98383cafc3cbd24e1c925fb6fbc9c5860e109f9b3. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/BX67Y2500025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d82cbdd633262c0799dea813731dc0e41a0787069d116b792c16897ce58547a. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/BX67Y2500031.