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 0x1df7af6fb71048d91f9e4d651158bd94f7d93539eb4907a459d31249d6da40a1. 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/386af400-b8dd-4acb-9d73-ec2c92eb363f.json and https://artists.proofprofile.net/proofs/artist/386af400-b8dd-4acb-9d73-ec2c92eb363f.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 0x30d76c7eaa267e174a40658af6ce91e07ed46eeb3f93faebb7474df30ed7f6a6. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/RUACR2200136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5861f96b463e6c289956ee469e4f65d6f1a9cb0217e3e2d3f112cb8fd50fcb17. 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/RUACR2200546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1caeed949d8cc4dbf2b9b55df50ce15c32a4f5cc3bf81d4876eb53f50e5c967. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/RUAGT2343019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe229ac85633faeec4756e14995e80f3cb986ae7e803fe4933fb9e0e25a720d7b. Chain 2 (Bitcoin): anchored in block 957595 (2026-07-11T18:26:17Z), 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/RUACR2400396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e4de7768d44f410a4bbedbd3ae1077aec89e16022a3952568c09b20a7b41e8. 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/RUA1D2498942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ecd0f5353890ee18ebac0eb04a5a1efd4cd613661782c8d6d27452dca4db7c. 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/RUAGT2424117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b15b937a665e88fb6541c2492515deecb9f9bf10df9707014d277d655100c17. 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/RUAH62406314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171f8366e9132d44b732ee41695daaca89276203a63c5bd9ec8cef42a338fd68. 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/RUAGV2410542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa084390b0daa13461dd01bbdf0c62bc7157d1beb69a5b47773381e6992872685. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:58:11Z), 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/RUA1D2535746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1159ea49717dc2c00bd19eae7bed6386e34f8c73496d9dd4b0fa7f26e9f2df51. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:07:55Z), 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/RUAGV2502240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85859033181ec0fe780dd9f71ac549a17f17a23b458b488a43f64377555c766. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/RUAGV2508772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb3312ee8baacc8db092eb0bb34246f47e430a8da4ca7da50a0555c6c2de2b16. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/RUAGV2511547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b1760d0acfbd8da611e48fb0fd0f49a7a0a749e256f4176adafa38bf051e36. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/RUAGV2516260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d14d570ae774c893acc705490463b8addc0452486863eb7962521597097342e. 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/RUA1D2425847.