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 0x51d997ddc50333587e55e4803031f96b84bdf1ad51393ce14d254a54cc74c2ba. 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/8f505831-23b4-40eb-a472-8645df46feaf.json and https://artists.proofprofile.net/proofs/artist/8f505831-23b4-40eb-a472-8645df46feaf.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 0xdadabb6b05b0a3dfc3b2b18437596015ba3393d1dd5ba04f9dffeb455b0d5616. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QM4TX2587810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa8fae17d2706deaf6fc9a98505c18714db7fac6c509464c49ed5280bd16368. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/USKH40501391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30fbd0856be6198af0935311cdddf38e9efa3263b2a73e8f33b654711fef45d5. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/USKH40501392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf9dfc264ae6710ee04bf4dcb5f45d700aa805987554fef160459cd22df52f4. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USKH40501393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a90367315c6aa089559a4da823af31731b360d1d16b0d6dbc43eb1cedb23d7. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USKH40501394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3b2ba618b694f225ef19dcb2e10924c1fba97b62056ac492d3e689257fa891. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USKH40501397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53cb3776a57d88417acf945c61b40d8d87e688f884fc0f0f33ffb558afc63649. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USKH40501399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77768b058efde9acb99646de8e49cea952e49d1f4c05b9206d73316af0b769e. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/USKH40501400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x762318353aa65416fb77ec3d10b0f8bff348873bc3880e6101a96ea5289468e8. 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/USKH40501402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae8cec266c04553ee138e7b9119357a80050b64a5c9e7d7f227e01ba0449ee4. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/USKH40501403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82ec3bacc1277356ea31d3e4f27e860d45beb4dd198caaef419da79ba6d182f. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/USKH40501406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb06ecb4c70b3228e2568237e25ffdbbe969ae6b956365b85c915eb16d81329. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/USKH40501979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf716d61602198f2aba07713243edb8c33d7aaca7e7c2385cf1b8d1e4469ec07. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/USKH40501987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07399ef766e72604d34feccf8daec82ebe79e4e41b7940676edfc89a5266b1ee. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USKH40501975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d20c9431a07130af2ffad848c5b695f7759329b39e6f7547fce25516d4b26d6. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/USKH40500857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df8727ca8f88dae1527ddb7e0f9341fdbcf448dd90274fa9bef26a070d84f51. 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/USKH40500858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6932dda675f30e8c199ba95b7ad58ccfff9b0eb19c7ef345452949f3477aac64. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/USKH40500860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8198048e0441cb18a54ff23235ba94f497b4e8804b8ef5b535ebaaae5fec74a1. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/USKH40500862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7cb9820b843febfbbf29ca93937fb0555495720c60312af1b11be57fbf6bd75. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/USKH40500870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c897a03cf599036ccd43c7dde5491fba50b93ab378ee48b1bc5375403075d3c. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USKH40500871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6efedfd4ea0a42949b51da8911b718f725be81a509c704ae9942aef54ca7695b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USKH40500716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eed1bf25281655f7bf2528b7000b44d63a76df21146353973095e1069f3f764. 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/USKH40500722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f9c6ba22e103c019aba81709b927e49ddf356f636111f0090c173aa7330d924. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/USKH40500723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad621b4682e10476a8b85a28fb3317a04cfc72e6cbeb886f7fbd7ce7ea09d88a. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USKH40500730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39fc4cdf8390b24bd50a78243745200dd26bebb02a64863cb909b896899e826. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZDQH2420356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbacd300d03368e6ca70ab54b9ca9edb49f2a8e768a027910e14cf8ab25ea8904. 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/QZDQH2516769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d7aa70f6c65a7ef7394bd3d69afd33a0f540f0c25e9990a0c1a7bec394185f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZDQH2520727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa458206b0b6dfdffd1e22e22575f9cc7740e3ff389ac119f95fa4a75c6775e6a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZDQH2526195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113018b418d60a867b9252df69cf259cd589d1393d7081896c06ff17576b186b. 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/QZDQH2538669.