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 0x7d5be63c4bed89dc68fcbb5b6fcd318615b8d9215189be54b0d8f0948491da70. Chain 2 (Bitcoin): anchored in block 953687 (2026-06-14T20:19:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/686dca63-2efe-4611-9324-cec85f69d190.json and https://artists.proofprofile.net/proofs/artist/686dca63-2efe-4611-9324-cec85f69d190.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 0xf2756ab4b187576a4ac895adafeb6c47696b2dac3cdea2c7b8261fa673e63696. 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/GXF972417161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc21b53cef984c88fe6d8950fa016129e77c3cd1d2e3f889ced19ebd2ffbac4. 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/GXF972440795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe457c4b095a8fd570929419b604001ebe24abbc7cb3ad22cd2e0d239288e826f. 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/QZZ8A2480481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4361e4a75aaaedd85ef34a941bee1281bda68c021729c0c0ef82214e4f1744. 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/QZZ8A2462533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7873ed945f8331c47e27a60e6cdaa0e56cbc06e68fd8230271b7124f687ac2. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZZ8A2462534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20efde9e77379a4428f315fda2581fdd9873c6cd2328ebc81baaeed1a56dbdbb. 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/QZZ8A2451869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58152ff16226927ba89d4de52b92714138920734f41dc04d368791028db7b57a. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZZ8A2429885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a14cd82b7891fe18646a3f181f8d2ad241c8cb334ce9031c3475b0a1d4a322. 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/QZZ8A2438874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd80afebe13deff0f36d6859b2ed06fe18b872c1abf25e9f3c76870dab9b880b7. 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/QZZ8A2433325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d0f561fdcbdcb269570619705d5abe8cfd0863dd40b3e7859b1110777c3918. 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/QZZ8A2405119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d7b49f1b0ceaa4c25a32ae2a738ab0eb05793893024cc2aa94e4b7f6ffd1b6. 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/QZZ8A2422403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32864de290e4292d3e186e0f385aa4d1f6d8806153c12b3c8c63fd3412c901d6. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QZZ8A2405556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39fc2fd0083f7e4f463480bb44f73d060c0afe4286c159353040d20c4190a314. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/QZWV32468543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d000b450a24278759ee27948b3c0d608e7e815e816e577dc2b695604bcb7809. 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/QZWV32489924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d921a7a0310dfcafd5257e68aacd48393e9bf116788da0c0321b3cfe9da311. 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/QZWV32477887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5b4096bbb63e504f00f3a203be33089ad153fce4cb1dfc2716e7372aca301a. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/QZWV32470428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xada4dedb46d1bf2ece5e337ec0d710083e69142681c2292bdced444413c33a52. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/QZWV32483718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e0fa420848ad8507bed24caafd28ef6313c8973c9dab2f190c8e48e047045d. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/QZWV32468911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63cf2f82a1df64542fb0fe1d39921b3c790c61915615ddc5d01067d74b07922a. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZWV32477958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8441d81f70800e392332d5557efb34579c438bb33a76fac337fe3702448dd1d4. 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/QZWV32472976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd936e8a0222ec1db3def672713c8a45c2017e8a55ec07a9bc4bbe760240d863b. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZWV32464156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2d8546c5c50524c01cca826df18d61d93843c710595653f1e7c7a39f28c9e4. 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/QZWV32458583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94512c083d7578dff09da34cabb507ce077c8f78cc556f1ba691964adc9ff233. 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/QZWV32461311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e13bfac1f89abde0a955edfbd51479bf984fba90899d36dd7c883b01130e9d5. 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/QZWV32461229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28506a072a4aa863e8bcae449ad84c5210fe7e473dbaa8b2924bec5455b839b6. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZWV32461243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b51a901bf8667618a6eaf84dbc55c226d28342cde6073810d537c83c2f8937f. 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/QZWV32455831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a2a0c009de03a32cc94e1e203e860e9d9ca08a772aeff86da20a7b06121b4d. 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/QZWV32450390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4394b2fe7e038d244ea54caaf09da3842a36133002fd27f0a85ba41f9ec75ef5. 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/QZWV32443125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693dd64b0f6415569b82c626dcc63dfe3b7363e5c8ab50bbd52590bab68e48dc. 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/QZWV32442567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0fd0876320473d7ac06baa62e94435899c0359d10494d34f3b167049eb3c279. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/QZWV32442183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dfc9cd3bc56a75948be67584f586aa3aade9bdc7e13913d3e1c65375b7f4498. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/QZWV32419724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ee98fb00b4ec96ebdd3de0135fcfcef48ebeb14d20cd201e424852c96f6bcd. 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/QZWV32419711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ee10f1946b283c944947672fc1f15f1c88af8b9703cf2302c6bf91fcb18c2c. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/GBWUL2463100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ba44b81cec24e121c3e5510d28fceb0d42d3f70ff97e6068d2635bd23a31bd. 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/GBLFP2424573.