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 0x723819354ae64aa9c9c96640b232fef4ce4ce889a757076f3dcbb55712f938ca. 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/df085354-9c18-4619-a493-b191dd8df609.json and https://artists.proofprofile.net/proofs/artist/df085354-9c18-4619-a493-b191dd8df609.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 0x994e07bb2cdba9d12c563f534c3bf17fc70e3e35a6baf0d8e2bd6287bb501d29. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US7VG2225058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11935d3230bbb083202bf507eb2d63d677e0487741fb6d41ddff2833e0653016. 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/USA2P2214395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x510f559c9017b520fe5d8ad96965b1785fa6b5e60131d5b7551ecfbd6772ccc6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T00:59:09Z), 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/USA2P2214394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c1bafd89a6c391c66c394758d4551ab00ce391dbc4f4f3fd0750fc37ed3dbab. 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/QZNJX2435746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c1402c2f45334b644063d41347b806e918c5dbbcc6d9b942941103866a63e42. 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/MXUM62400165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64560e153954f51348afb55d1d064491f2889a468c354e9cee628de86e332a0. 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/MXUM62400169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x369fddec3c0c88039dd1e42f7eff83e78da2831566cd2c2dc7e5d5477b907291. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/MXUM62400173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ccf637e4b370e0b97756b7cff3b0990a3efa29879829bfdacc9ab76462369d. 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/QZNJV2139847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x980998f37db11e10c8d6cbb3e1c08eb2060810df1aea9c34e5f353b949d2f708. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNJV2139848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1927d6a12c5d076b7760ceb57be59ddf48355e76c3e751cd40234ee2494a25a. 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/MXA3V2410124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582416a91bf858fdd74bc4c3185830519f8bafe29057f8098c6e2551d2d06a71. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZTPX2457745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29f21dd2bd6d82ff48035003ad3841ba0642192e1371bd1ad6dfa3500bf80c0. 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/QZNJY2430101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63da05d0d077cb902c4e5200b83c2c1357edc48724ff54f36416637864a20c7d. 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/DGA0Q2346065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e297b8aa6211fbca80624000e8c9940f4e5009e8544a2a4f4c7a3316daebb7. 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/MXUM62300627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf73e32c0f896094856028df2cd79da268976ad59b1f274ee9c2d3c79d48ee8c0. 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/MXUM62300435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035fb707ff0fc152d4b37b41f551fdc3a1f767a726fc958ffcf35e19e595f716. 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/QZ5AB2343972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc999cf81f94b73687ec46684217f1465184596fc123fde7dbc6840792431f2a4. 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/FRX452272412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcacc7aded44d62c08947297fe654490a1a0b33e62aec09e49f4527e1af235e48. 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/CA5KR2088968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a45608e5473ccc3a4924a511f4ce0035a03101ee40e9d0a43d489877d390a46. 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/USCGJ2515740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bff89e72357ce0c5a01cc3cc38ff1100631ee2b342606ee8755663305335918. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USX9P2032348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc951a93fc2c61a070c64607d2f89887ea85e4fdb55d3095956e18399c63cc7ab. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/USCGJ2461932.