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 0x370d95714365cf0bfd51d25ce3cd2957cd55cb21973783478297b11607df48c8. 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/62520e1b-0285-42c1-b781-76571591c7e9.json and https://artists.proofprofile.net/proofs/artist/62520e1b-0285-42c1-b781-76571591c7e9.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 0xad55349b0fab840ba076a54b3753a13e36478f31483de81092f899ff2d356fa5. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/USCGJ1941163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49948a1850b06304030efd083f088e9dc47f3a990b4911ed2af6d506c0e726de. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/USHM82176237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf9933e6f37da2331850758e9f13f2fd74014dbbee715328fda4febdd1c6436f. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/USHM82176238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e43b01895eb8fbb6f0dabc3e9550ef99c7741a0be29c9f39e0965e56760a5e. 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/USHM82176239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd96e2278e0d841f43440cd9d755cd46863c766a247b9611652412e5fa258314a. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/USHM82176240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb58d00e6290beaceff17d0ff2678e0ee28984dfa5dc70897e76c0877d57f1c. 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/USHM82176241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa654c53076450f668fb419dccba12e16bf6ce31e755be104eda16fe7e646bd13. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/USHM82176242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba0508e9f68761904af8193f2b5df4049d0aaf7c7c383177cb4130a7638fbc8. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USHM82176244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b6fcdadcbe70567c2cf45bfd04b7eabc80f6eb6167a11d96b68007badd3801. 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/USHM82176245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ed613265413a3b91969a8e04b35b3ce38725c7219eae5274e3f06144b17a2f. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TCAFC2051038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad5a6f79f2f26f0c2c90e5e8bdb38d4d36a383160d1a6fe51f1d4eca74cced1. 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/USCGJ2296072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf35f774b8b0dd541cea72cddf4b251ec0b62d6eb9090b316ee04b583494673. 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/USCGJ2296073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88d164e5ace7230971ee6f7ccca1b1086482ae0e51434ba928afc38bf5aed44. 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/USCGJ2296075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b401575bd30db0bb979d6b69cf8c366b954f1863540edab90ca1b83f39de1a. 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/USCGH2242882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b123bee408a325b0a0769bfd10c3d67c727b885779a4a093895a6aa18e9e078. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/USCGJ2296076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcaa2ed5b53b7f171962f0cfcfc6166623818badb4ab0c8c6259e8b0bf37c70f. 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/USHM92212007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053d818e4075cb175321e9081580d9b2787ed5044674b147597d192d57442d39. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/USL4Q2265499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb23368ea3b1c4b66e01755699711bccaf097ec5f73213fdf936019f51ead78. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USL4Q2265504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d3e9c9559e6dd0caa6155a89bed5fb39bbfbab76d075f1c7eb632afe03e0f7. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USL4Q2265505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97ad49bdfaaab7137e20f855c9cda62d9e8a6881270aa84169b4e559f1b3415. 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/USL4Q2265509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd52998b8a0e377cfb709ae6c9abc1898dbdca2cf7670f04d0f38e18f6c2a2629. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/USX9P2303738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe02baa4a7571f81f57eb60d0aa052582e40dc06454ca97d33d4fe1ec4997ec9. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/USX9P2303739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff1de429499825ffbdc5bbb7976eced2a3bedb68e8a307a3a4d7efef30153a6c. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/USX9P2303740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e0ea488e0492b38390e63cdb2920a2caff42b5386857dfbd20cdff64a875fa0. 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/USX9P2303743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b1bdee0e7c74e0e6507dbbf4c14710496b51aa500408c255c03785abb18b08. 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/USCGJ2405946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f4859d2acf47a26f2ce363b8eef00158cd49c5168d814974caec45494fbdae. 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/USY242485105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3bb8dfe7736fe9b8ca292f8547d189c8432190256b4c6762374f5f3b316e872. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QT3TB2416304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0052ef775cda86df4a40e9a621579e2512c3b875632ef39df9b7e3c8fa88ad6f. Chain 2 (Bitcoin): anchored in block 957608 (2026-07-11T21:00:50Z), 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/USCGH2578802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe39f9e1c0fc26bfb70785cbf8cb9be3c3544a2f8219ace2403be7eee20ebf3cd. 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/USL4R2544726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a66d8e83857e666430d14ace1cd34ae5098da652b9fd0d2258cbbbf7783be0. 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/USL4R2544727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078eb70c21727e6efb68803a1aae5181ee0bd443826c0ae353b6c03c266ffb43. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/USL4R2544728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c739fecf5ef6a6d2c014c009df0df3006a94f127476855528451155828224ea. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/USL4R2544729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8310b1f44c3f3de98c3b0eb1dfc7d387c05731cdf1b9d27655dbddd480bf398. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/USL4R2544730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeacc47d2dca38a078480a87d2c252e96346d2024202c6ef174cee369e4d0816c. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/USL4R2544731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b16d9b5cac095941947e3f3b97bab376f4bc82568fdef306eaad55c70169015. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/TCAFB2021965.