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 0xbe450104b6609b2d1e5595c44c4e8cb15a65992a59e6ff5ba9f8fa7842759fb1. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2c856ec3-82e3-44e9-9e6c-811286c2389d.json and https://artists.proofprofile.net/proofs/artist/2c856ec3-82e3-44e9-9e6c-811286c2389d.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 0x20362baf00ac005e5debdf469d3ba0ca824d30c045ad422e933a0f8dffb35173. 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/USCGH1458872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9e2e4cb651d51681d6eb275d16903520e84784fa7a8f2d76fea39cc6a75430. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USCGH1458873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7350ba023df8ec3699035c6fe9f75b8cfb346ca74550356365c197c2ec8d168c. 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/USCGH1458874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7987326da9737cf598af0146f1b44bcf0ca6d6fcbff4cc3f2e77bf513fe1e55. 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/USCGH1458876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc4c87a1e640a066132e08f2b3052e9d60d5fb23b52686393c5b5b458387b47. 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/USCGH1458879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ad820301182de9a59c3bb21610e3a4c04971f24f75f6c331dfdf36f83a8f79. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/USCGH1458871.
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 0x3cea1601c9d63911f55630e137b0a28de04934c01414717fc4ba99d29105a1e6. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/USCGH1458875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabcd805b341c505de5b335a01f09b30798a18fbe4a372d7f24751f3c5b67175f. 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/USCGH1458877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3479d15390ee3251140abd53fef98601429e65bff1e692b0890428724bbab273. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USCGH1458878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8345861152188d6c3094aa087c7ca560c730cfdc93e10ac2534418e972009af3. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/USCGH1458880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d6771a12749f559ffbb40a4a946d4e74c43f1fcc72d4b74aa62c5aa86c9fee8. 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/USCGH1458881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9b8928fbbb3b7c8ce20652031229759434d0e7fefcf9e0b0dd0ac3a64b51c7. 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/USHM20829996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422f8b7429b56f4ed0fb2618bf60a5b4fb4696a20dd6c202b79993621dcee941. 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/USHM20829998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546a388aa14bd86ab622fb8d21604068cc1b74a019d5078019a8742881b32a2c. 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/USHM20829999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335f1704bc9e0daea7fda0c2855661f2e9bf7666d22b59e7fd2d622c08ebd030. 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/USHM20830001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4928fa97b99250a7ed5b4c0c57d60a0af27433b45298e4fb940b78d69650e78e. 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/USHM20830002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ba43a162c01a5f518ab60ea56f0f22306880500ae2c36a005e3360cb717281. Chain 2 (Bitcoin): anchored in block 957246 (2026-07-09T01:49:50Z), 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/USHM20830003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad27f3c86ed81d5a805dfc7fe73b9b8a1dfd11e158d24fafec61fedc0446fe4. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USHM20830004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8536f16587ee2b4a0f559cc1e86848b348cffeeec3e995ff9d00087a5a2d9186. 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/USHM20830006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee5b8f3df146a2d61dbc6c74b1addefad2a1cb2a22a9f2820b3f2ed9a30a05a. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/USHM20829997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x736182f6034c568833788ab2938e8adcda2fc0572de44fa574afed641017168c. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USHM20830000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb311a3d75124da5a256bc35b04534cfaea477a473c268beb930318aa80213c04. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/USHM20830005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32aad95c1b9204cd8d8162b376949259e93440e96824b931aa21fa216a431571. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USHM20830007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa907a37cfa3a141ecf636d105a51c285318fb54cc09c79baef9ae1125f187033. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/USCGH0765781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca0f409f432c5bb83b095940278554cd934051d590c09a341dd588c1b1618b2. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USCGH0765782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b2ff4f57f91f326fdcbc4875b8de676bf8bb0940367efc325e35db680e2e3c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USCGH0765783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb67ba0d0b0130ee4a0a0749d7ea255cb6040b351bbf3432a9cb026ea67ca8f60. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USCGH0765785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ab8fcd09b50cf7236fe92df259a397b11848aa8fcb643dafe107c4a9cc6062. 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/USCGH0765787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36885ee043fbd50955bc8303fcaad5e5dabcca4a770b6b3df0da35947de4c8b5. 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/USCGH0765788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51f84c9e8e703aa32e43d6cadb78b0746196f968b60cf64be0e13cda6777cb5. 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/USCGH0765789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b4cff35ef5ce7d7f3cc86a85bb7a9a0b16912a451ff89ef50e27d5f2b4bcfb. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USCGH0765780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c717f21cffa3b19ed24fe156528a7fc2dec27758a99fede42790a85757d590. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USCGH0765784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a5ee4677081ed0d235dc2550d67905208dae263a8729046e360c1745befe12. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/USCGH0765786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c95392d18f60c1a80ad4a54552cf9463c51f4a3136d385c174aa9f2fea8c89b. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/USCGH0765790.