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 0x69a4fafedcf0190f0f9950b4e6d0e7163460fdff11695c044617d2b74fe46a16. 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/e390457d-af96-463e-8e71-a0bba2472e78.json and https://artists.proofprofile.net/proofs/artist/e390457d-af96-463e-8e71-a0bba2472e78.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 0xf3b0798711d2a894167d9f0224582bb452ae725c513a168ac470cc82bddd7139. 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/FRG140701040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c7737a5acb2544625230abc0f5922b3f3ee7d8fc744b29f55f18829205ebb5. 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/FRG140701060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e819b0c3fcfe3df88c8166a83b6fde7d8ec1a3c24368c0a8d745e7f6e7c10f. 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/FRG140701150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22250a322df0339a26106f2ccf0b2acc9efc91adc59cf6690ede37c06a9156d4. 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/FRG140701090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672fd8c69fb9f4ac898680a9ea31770094d01c46617baff55c549193ceec70f6. 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/FRG140701100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286367c268306a1927147186642028c3affed895543d675e448aa3dd81ea217c. 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/FRG140701130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5220a14a8a7ced47cfac45be6a2d4d6091c2e220c1e3a7c4d9f2ec29cef18559. 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/FRG140701110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac5b8786873346b38582c37c9390506bee25eb5d7e578cf82a518b8dd8e4185. 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/FRG140701050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4538f089301b05218e624e1a92dc31ee630d9e573bd1224c8dade1b0dc0afe8. 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/FRG140701070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4e597eb743c055d2a676ad146f990a9ad52f8640a5c44b3fc7f0eead4751b9. 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/FRG140701160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70487a8fed214b611fb7ec66e2c506e2fd478bc0543b2145b4eda78e89f406eb. 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/FRG140701120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4a5088d4c9faf3ff7b4a231f09d98e35fc06d32d88f99e98ce4c3d2dc6ea39. 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/FRG140701080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9766a574f320d23a4c1a68f22769b0c9f470f16660c0543f4c86add1e2cef87. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/FRG140701140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2fa581ab45a124249dd8b2907641c45363a48400e3b8da363200b515eaaf83. 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/FRG140701180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe90688e4cbe4bde29582239faa81afbffb40618a952fc4f6d153ea14b339ad. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/FRG140701170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7de22082b89fe1037fdee2b28043601911e38b2aa7a8b5ce63be16f625f588. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/FRG140700420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7172983edcd50693d3ad033da71bc6b8054b442405275f6f6862b6be8441e5. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/FRG140700400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936d68817d5fcbc209df05ef278c70c076404677a5aaf925785ed45d2d7dba76. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/FRG140700440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4225a7dab14bb2875f7bbe64087be43a37ca6006c677822fd91fc2134601fc5a. 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/FRG140700780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48675b411cd9e5d0bb83bfd5bd9176266bcf316cb18c5201001b73229d4f56c6. 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/FRG140700020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370e61686ee41d5cbb58c1f1d997652e9665850cb983cade03fb94dda98fd271. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/FRG140903630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f920a390569e6b6241d23ef6ee1f2946230a992520e93afdc29a810546d62f6. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/FRG140902760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a865b844d5a8a55cfe4e5fb69f19d52b6187d715f3cf0f72e47a528cd637a6d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FRG140902330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93188678d09b3c01a4971088d806946a61f8db57b0be8b74ee05e5ea39ed127. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/FRG140903650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2cac3f705772379e8a609b1f2a280e2e8e56ba1cd6d07c97f12e0379820caac. Chain 2 (Bitcoin): anchored in block 958678 (2026-07-19T05:59:57Z), 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/FRG140902830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aed84e0fc572179ce039dff7ce2b0be807a4ff328c99bbf1f158128817a6de4. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/FRG140902670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ae25a55c1c90a1c61718e8c88fd130cfc7dea24b1188be5f99b896bd5ac817. 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/FRG140902540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c892097850bb1f85e3dd38b37582194be833cc70c445ed3e30e65a1892a8a47. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/FRG140902350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa343e9322f075b227b39a147391226e8d957916c229d88711876951f331b6147. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/FRG140902360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35003ca98b4d977b577fb41e3b63ef7c18fc921ece57e0dcbe37fa94f71e71f5. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/FRG140902400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b5dd1c34143a52fd236fa547ce9f10d915b9e3ce111c9b2a7ca2488a46a06f1. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FRG140904280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538b8d361867342c76c07f5ad106d1fc0a515dd36c11bd41b20c94f394548b45. 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/FRG140903520.