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 0x02ce9a3a2bfb0057437d2ad3ab234b03b35f854a31d78bb9a99ea1397da8c156. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/05f94704-f294-4191-a478-981f882f34fc.json and https://artists.proofprofile.net/proofs/artist/05f94704-f294-4191-a478-981f882f34fc.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 0x1593e440033845aa9b83bf14513efa61e76add33baa9fd2c69c5c968c913794a. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/TCADA1726704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341f71217f7eba2483a61c2b8d67455dcdf70bdc3917f15b8172150e7ab41c4e. 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/TCADA1726705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x454ae162d04e2bbc6ec71c1ee841cccf8bb26c971b132c5c56bc29832e7b6af2. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/TCADA1726707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x442741af0596a10bfa26dd57f91599003048be4e143b1b481a74350ff66104b4. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCADA1726708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56dc8bcec45a8ab259f4e55610a4a04d9c3ad01194f59a4d1772db766f34418d. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/DELJ81823646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8c47964af7fcc5fe201167bb88b7c40a08f6e59d91f64e063c29b100893afa. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:19:16Z), 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/QZES82053465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc3e43611fc2816d93db84fea914ba2218675955a74ab0204e354e088684101. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHNA2083892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a609652d5f3b08ad96b6fe20059dab2b8477884bd28104d0647d84b96d094cc. 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/QZHNA2083965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeffe5dd01312ebf3c66562166c82afbd6e8c160398f8b20335b1306b61ac3f45. 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/DEZC62185395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2727a221170bc9641a2b4f04a97a05cf8eef88ad2ea3f0dba413b9577996dc42. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZN882134986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38544d2dd01f08ed90f392b31158664c677786bf7b1408bc729c30af53d83ee. 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/NL1LE2202591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543ff26fb371bd8c36817c995362ca8ec49243094fd10ab66f883f1dec8d08c2. 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/DEZC62268555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74353dbc4edfb44d79890d6ea5af3325267eb2bb18c0e2801b35abc87c6a424. 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/NL4YD2200240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd15dcfa7091f00ada69a845d5afec712a038234a22ed593df6ef2e340440c1. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/NL1LE2303370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d6db46480ce39fd123efffe212fca31be8be14ce45c2353db29b9c5f0bec53. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DE1FB2400302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755b01431b175ca1de0871cb93f6971685a0391841fbee05ceeefadee00d2e82. 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/NL1LE2503800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8372f7908118bef179ce0905eda40f4a641c908503f70bd363cbf6a7e3b9e81a. 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/NL1LE2202623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4458f1602f4e9c07b60d5e7f7a7a42d7cda076adbaec223e2e2838571071b432. 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/NL1LE2001088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd934c59bf577b2be1314d681efae94fd9823fb22e49cf464eb05999190dbbea7. 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/FR9Z62100589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c199807468c0232f651b8238d1438d31232b2dd5df6a26f8fef50f75594d655. 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/QM24S1916934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x074479a507066eee65a63acdf65af7ca08f2f30a990ecbf2fd6c15d53bcb6d6d. 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/USANG1928492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4458f1602f4e9c07b60d5e7f7a7a42d7cda076adbaec223e2e2838571071b432. 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/NL1LE2001088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1d4481bf0f0c906c62dea818cb366f64ae25dba087d11bf9b1f2e618b14eb1. 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/NL1LE2202617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce8977e5dfffc95922b0b5ca63ac9ae9c62e0b3fb0187483e2cf676c7bf9ae6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAEX2021174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3165532b7d9179b263239de6f9407cebde73605643072421713a90e3d81a10bb. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBLV61811332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28b5a3da73ae45a12120068aa534fabf8bf738d952ac59d85889b0ff832a188. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEQ121854799.