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 0x808bee20b033c2b024676f77492b583d22a2b383c9b0c28dac5dbff3387486fc. 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/5fc2d75e-6642-4e6f-aa3f-5ab2900cb502.json and https://artists.proofprofile.net/proofs/artist/5fc2d75e-6642-4e6f-aa3f-5ab2900cb502.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 0x145422f872e41bee2f5707e441234f8aef60fff3116013df326795cb1e5fbca4. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/USA2P1954422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eef8918e2c3eb7ad8399d8f9a07c1502e69dc8c42fbf15f9cf24d9da5cce74f. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:41:35Z), 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/USA2P1954423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d569c2095fc8631d29010a3c4d6c5d43c45f7d266d637b89ae0e8503f5229a. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/USA2P1954424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee22181630e0d6304b2a565ca896c973515a3373bad960fee7d186e910f38e5. 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/FRX202031101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1364923cfe40aeada107657a370204d7e92c07db5378190c6cb8764b59181d2. 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/QZHN62192822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e9aa82ae8f476f00599daae27960292da0a2e1d7a05bcbd709524361cfaad35. 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/BEIX82100129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa14b09564cde45962fc908ce36f85f3e9d04286f39805f9ae6944fcb58df635f. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/BEIX82100136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2bf8a4d34ac4dafb21fec385d6a0cb514ce625082d3e758be1089747c8443f4. 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/BEIX82100138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaeaf58dac5455eb21e2c70b6ae73c65fa43ac6b4b164e3a8ad1e48386ad5669. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/BEIX82100131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f26210dcc5256005c32051b998c8ea1b1a897bf16b1ab10dfcec423ece6a16c. 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/BEIX82100133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ac8e316d6a2686ed6e2e7254ee4a84a040efa9af2e9432b54cd564916ef9c2. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/BEIX82100135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127230c7f815a349a280a9b39decf43dfa3e14cbb1e25fcced0c0a81dc897cff. 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/BEIX82100137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa26be2dbc6351f494426a68b14da4877e3432631f06913eba792287860229e8c. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/BEIX82100139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d450b386a15cb8e5910a55f6ec578fcfb36aa79d4b316599d42b08583846e1. 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/FR2X42251968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27bcb0a359a2c9e848d3ff78f6cf70f6a0e1aef10b4d1decde3dca4099a8119. 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/FR2X42271597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2826dd129ab46c109438f1671961d94069b67f5dc1f44154a963adf68913f6bc. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR2X42271598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa265b60c31199d7818428ccfc274e15be30be7ecfa6a286b4fb0fecac3b15f39. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR2X42271599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2006c7a0165e064953910eb19e97394350f079033c4c82d48d82a2eb5a6e6d51. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR2X42271600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8177d3eeb09cadd603bef2a527166897013f3a8aee5bdfeb22764fc4f376049d. 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/FR2X42271601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4bf8f67d76c748c405481f4bc17229e18854ac5b11dd7fda1d652fc685af71e. 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/FR2X42271602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce05a827042d83e66f265e571a225a1b4ddffb7fbea465b66b2a7eb68e01895. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR2X42271603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72be1f74f540a13599ea57d9720e5456a41251e1c5481d5695c637e2c34f31b. Chain 2 (Bitcoin): anchored in block 958613 (2026-07-18T21:35:09Z), 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/NLZ8C2200229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5cfffb724456d513520a102ccc7799ac3396763a8580f0b2ceec8533c15bf0. 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/PL74U2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ca3b7e2722580600b0111310640ed6234982d766780eb131ab698a56ffc19e. 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/PL74U2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72be1f74f540a13599ea57d9720e5456a41251e1c5481d5695c637e2c34f31b. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/NLZ8C2200229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe89d6dcc56826bc94fdf5889e81da08e0ff007b4c91f5a6ab644f29c4b196b8a. 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/PL74U2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a476005d5038d9d775d56d031852a3e412fb63a032519d18731396444bec62. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/NLZ8C2200253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39c50da1f57c2cd0c1e6efd70b7888fa25feb4215f4d12022dae88f88c1f8db. 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/PL74U2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf2f3b81940c20a8590784fa77d35eadce1369ae97d43df5a6c746747364600a. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/PL74U2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0468ad7f7f72ff960575cbaa5567fe34616d690235f2aef6cc6e2a33844db81c. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/PL74U2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ba10f0b4b3c0ef5f5c1cb4f845d62968a391700fb9e69fde49edc02322b2ed. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:02:04Z), 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/PL74U2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9664bb791fc179aa39dc3bf7022f7da4eccb4c188d9de94166cbb4e145b86ffc. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/UK6822415349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x792723669e3b4a631666e129a5e2d95de5e654271dd32fd20a2211219d13531d. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/UK6822415352.