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 0x55c9e21567e72cd571240e7226ac17c0d26af49bcba70803cf22aece564bd64c. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ab2521b0-a790-4f7f-a7f8-ea6c138bfc99.json and https://artists.proofprofile.net/proofs/artist/ab2521b0-a790-4f7f-a7f8-ea6c138bfc99.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 0x562136550dc971b4d295ba3ac9e1ad42d37fcf88501e405b1b37ced0dcf8f2ab. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/DEDE31615201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dcf979e4899fb4360afc64da4ae3fa51e39af5b2e06dcad0db563c72e2638db. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:08:24Z), 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/DEDE31615204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99638e190bdc7036198486318d7f2760c04cff133b3b3313c629b1f10b89ea47. 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/DEDE31615205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x775018aadd55718339f7ed029bac791883ee79d51ee1a447208114057d2c9a24. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/DEDE31615206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6905a05b3e49d8775a60fc0efc96d8049b0096294a89e979bfa997b171568e6c. 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/DEDE31615207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6903766aaf2f1a4f5a9fb01dce8efddb315787e070be8b27cd125facef092c4. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:42:01Z), 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/DEDE31615210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55fea0d487613efe6a5c0767a37d4c5914b1e6878663622b1615d6f076ff6b3d. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:03:33Z), 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/DEDE31719205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf538c1c9dc497cab7ccd320d94cc1a70bef055bf6a4e3a3a5e23cfd67ed7854. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DEDE31719208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa130b2eece123c8d7a0c5f4710ccf6313875bc4f8f4a5f77c753ef99451b20e4. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/DEDE31719209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb977a7da4a06f7c8a2dadd586078b170c899b4f69384863f79a80774e3916f9. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/DEDE31719210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32589aeecd75833f31eb7b2067fdd9152875ef624494847fe289730e1423a391. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DEDE31719211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080b0cab7a96eef042cb1be5fce5b06fa32f9f866e09395435f1b196c14e3170. 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/DEDE31719212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93de660496e5f8e2972a6f493d41f59d1cb00b9bedbea3f3c52afd9f7ffc178. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:10:36Z), 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/DEDE31719213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750f7f4f8c17957dca2905a22fcb6f31c04e06f9fd65703f7ff4d560ada8b8a9. 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/QZNWZ2503014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9983dd491a4b10fcc61dbd6b7e93cf05f47d1ccbfd1783477f8757d68bb2c910. 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/QZNWZ2503016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd829ba973a86c471f8c75337301627e11821138ce7fb83703bfe2a20af0e8c. 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/DEDE31615114.