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 0x7414bfac0f31b9ecebcb9d91c42db08f593084a1701fc03b34dcac467883b5b9. 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/612d3b25-8d2d-41ff-afc4-31993b21a2ca.json and https://artists.proofprofile.net/proofs/artist/612d3b25-8d2d-41ff-afc4-31993b21a2ca.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 0x3d039046c0802ae3e5a70576bfb60e10d514d45110ff96758125bd48013afefa. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/FR8FB2115400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f5bccb207cbb950cd3c46e14e8e4c680e674490e2ad28ebdb88211cec6e19a. Chain 2 (Bitcoin): anchored in block 959011 (2026-07-21T13:26:15Z), 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/FR8FB2115510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a0e089f6bda6004583ae2dab0b605f19f29503c7d2786b6cc1737ef4c1dbbe. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/FR8FB2115540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63064eab271afcc938730b4b4a48d093c5888661f38511e2aee4070f4406ce5. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/FR8FB2115550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccbf21c95e9919ed68d426d1fe54e409d7e3f57941272c6da9fe5256adc20268. 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/FR8FB2117700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35900cbd24f4b9704e45d56f809f42439e12bd71d762d376a4b4ffcaf2c3d201. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/FR8FB2117710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec4d328238300951a24b499d9e6a6c7d90f5f2ad6b7ba47e7d66b65f6ea98b8. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/FR8FB2117750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd214c7593e7ba07adc7bb5fd1c282d5927e00a797d9b48e7ceba820392baf8. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/FR8FB2117760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32da2aec2fd9a14eda6b72dcf2929b799625f8b695ffecc29d3681eecb5238af. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/FR8FB2117790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863dacb298978cb25eda4035c74e2df63d24855115b5011b8ce69ac1a56c44aa. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/FR8FB2117810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b43602d77ed5d0aa98cd0b79c1b48728174193d34d2a08f79bfdda347cc542. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/FR8FB2117830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01356f1513f08fbddf915e0fe4dbf2f1701d2645ba5b3e883f4a9e97106576df. 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/FR8FB2118220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86d9f05b27eacc751d7b9c808c21cbeeda6e4af3d08d3c8eb4835c8d1fc3090. 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/FR8FB2118240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77844fb2af6dd8570d0854935ee11c2de55f4116041289a1130a306b453835e4. 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/FR8FB2118280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ab78f3442c5f6c71cc3afe250a9f834ee0bdef3915f4984918f4ec1f46ad53. 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/FR8FB2118290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585d9fdbc3ed9ea30a111439495294fc88647da99db631162749b2be0b0e5622. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/FR8FB2118340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799e15d14d9019a4baa43f14fa8ee088ecf0717341fd8f6b8dcfe6ce70e8712b. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/FR8FB2118360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aac748118455b510bd1f30e434ee247aafdb8a81592e4b5f266d3b6d6705b62. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/FR8FB1906000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0cc2ca7f20c73d40be7eb3ab24431a0458389431df1f535af4837e755c10a34. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/FR8FB2107000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x213eec1818fa5fbb4e3b3398c548442fa44b0d9751d878bbd1a696adb12f8537. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/FR8FB2114840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe57cf67eadec5a15ed60141d18554a4f5043926056e5b804920433ea28d322df. 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/FR8FB2114850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b54458c07aa6bc349228fad1c6ef38019b5079772c996bc05d45d554701291. 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/FR8FB2114860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e2189d75719648a9ebf54c8329b1cde6f6f0067ad6947e9cd242a5f9e546b1. 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/FR8FB2114880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aac748118455b510bd1f30e434ee247aafdb8a81592e4b5f266d3b6d6705b62. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/FR8FB1906000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a5c62b5bf1de51e01240986152d4c0a2f7d203957fb3c2cfe84bf9c83fd78f. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/FR8FB2114920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc4c62eadde77902c1a0b168281336d256794c816d549ab39047d11522bdcbe. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/FR8FB2010500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b4a6dedaef53ed2f384966e753a87029163ee4a37a68f119b002172f06bd75. 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/FR8FB2115000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089a70f3effcddda3ea4a85fd7795aad86c40f83154a5060a32d8d61af05749e. 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/FR8FB1906010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4bb153553dad348f9265aac1675084b745a2dc30089ca6d8efbce68e6c7f474. 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/QZNWX2102885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b57b7c7916d3183f7daf2e6c02d499efb72870158b0e3281f6b0859372ac987. 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/QZTAS2163816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4a687b74234b06eb533c3820d4f8337b010fa3db95b31837754bc654944a86. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/QZFZ22252700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86162cda581e064aeedc93be4bec746f79eb1680d763bc0e9d2b2637d4d7c1a. 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/QZES92273277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a49256cfeb6f524d8672e6bcf77896ce9e28ff3af1d66fc7a3f6423152b5564. 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/QZK6Q2202561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d3493bafda3c3e92fd90ae1a9ac128fa6bea2d59deb339f9e1fd33bc241042. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T08:37:45Z), 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/SE5XG2258615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca47096d1e39e686d879cba942f46fbd2c8e28b0545fda379a9796c9a8b9b4b. 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/QZES72486991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f8d75069a3a9d4f966301a5097b7c92c41141b2fd641eeb3c0ac417b4c125b. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/QZZ7N2412223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc94d11671d2b16983b8bd835ff3ae8ce2f2c70790550ef595caebd9de60bc3df. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QT3EZ2403480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f479b5a7fc8fdbad8f46bc0703c8ab244a249328e25d3706ca8985bb71c410. 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/QZFZ32530526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x352de49ba3bfed7d0cb784ef5763e6da735354a32f0d1424eb400c1d534f3fa9. 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/NL5MF2101529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6768ad1fc507cd909fb761a9e96f90c5b267f609a799f85caf7520e52f494a4d. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/NL5MF2100369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52416556ca0bd53857ded6a0fc6e5bd0a7c863ac3c8295fec41d67b8ba91a5a5. 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/NL5MF2102943.