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 0x39bd087fc5c1cf32d5bfc95620b6d5e63195603f186910dbfb63fe6bf25ae270. 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/33dba359-8576-4279-926c-42349cf82eee.json and https://artists.proofprofile.net/proofs/artist/33dba359-8576-4279-926c-42349cf82eee.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 0xed6f86c6c057ce4d402b25a3a1b4e6b7723987e3b9d604258091843b8b0da656. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QZFZ42106622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a7a0f789c5dc22287d1ab049923b171851d8a688e731259d7e910a472d33c2. 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/QZHN42271731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07db97573a781fa8866c8084fc22b83d6ea5ca17ce7d7b3b5bd4269af01c2bec. 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/QZK6F2226204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c8ffc45543ac907da61676a12d780a153af48bc4fab1830d0016f1820574fbf. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZMEM2264945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd68e07a8725fca79f272c00831a64fabe149abd4842c544eb53221d3879739. 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/QZNWV2274351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bdb081d43c90f644ee15b75489ba9d38a7916e52dc32e081eb5bed74d71d009. 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/QZTB32251035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bdb081d43c90f644ee15b75489ba9d38a7916e52dc32e081eb5bed74d71d009. 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/QZTB32251035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52a7ccff7e2ef630b562e7992b3dec4044e6f5470624423e7f6cc6db4b925b1. 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/QZDA42384736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54fa7cf6fe68f4d3d4167746574673509b19507b3998a3144dd48795c04c75f. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/QZDA52338499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14973fa28a3658bf71d8bd3a4c93e27c18797d53377973a122299b7bc30c5499. 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/QZWFF2318320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14973fa28a3658bf71d8bd3a4c93e27c18797d53377973a122299b7bc30c5499. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZWFF2318320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b6ec3c55fd63d2d9c62648f330a564c05c80cf12ee9249d0a67967d9856bd4. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZWFK2333825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6174a540816959720df4759143856d6597443238eb332019b0c68be30edca357. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZPJ32368255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6174a540816959720df4759143856d6597443238eb332019b0c68be30edca357. 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/QZPJ32368255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a4f4fe3611659bc3843dce1fd3a64b7062d1c2b2c8647d81f12b1fe191e3315. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZP7F2451689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52d24313478450decc8baeb801feeb6f2c5d2a65e9ed57a88091bf43d65b4d3. 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/QZP7F2453403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea9572e1d7ddcc3c1234832714f77afe8bdd2f7aa28f7a3a0442cf35fba158f1. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/QZK6Q2523037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9eab967998db85f38f6c212ac731f023dfd6f2d3f191ad8a7802cb2f4e5dcd. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZP7F2535263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a7b991245cd054814d47127cdc1068a81101b544a562db32163c996689767c3. 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/QZPJ32455746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd40fb8e14c324d7b4d9797ad9db3339de39e4d74e1dbecd1eb00ae5c62660980. 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/QZPJ32467054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f1415c9e6648f719f61ca64a9d53bd4d761baee2011382eab10f10b6e42efe. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZPJ32467053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5382d9d034b208ffec862d16607dd33667ee12d77146b0295226378393be5b0d. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QZPJ32467725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d2975e3284dfe992c3c54cad4fb6f4cfbddb9d272c0c121a7f65e59728113f7. 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/QT3F52536783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a70c9c1331c12630260a05ca259484dd03b53c28126f6b945c4279f9157d600. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QT3F42524114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd669ecad79ec80feefee1b1db0c62893a997f4b00813244e56b103b271a16a. 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/CAQOI2530628.