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 0x90dd8229bf232cb39474276217c1b9cf260666b36b4e722fd539f75c4039412a. 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/105bdbab-9b08-4004-be21-88c7386c865f.json and https://artists.proofprofile.net/proofs/artist/105bdbab-9b08-4004-be21-88c7386c865f.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 0xbfcb1007d95460124c6752beba7cc884598425282e23c873863575d22e011b2d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEA622101183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe425671e34f11480b10935afc5b6166d708bfc8dc753b1749c220de984aa85dc. 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/DEA622100996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c75d3203b8daa1ea73941eb2be79f87e427fc3c7442f8e8588102ebd7f4fac. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/NOXMW2404012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f75fd3c30ab79e808efd628eb85c675446eca7785257b35cf6da20014f031b. 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/DEE861807448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c4056ab586705aaa1ebad1954cfbf46677ad2bded17ce660d00777ea72eabe. 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/CH7812195502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341ee5c3be24463705ff398087be13526890e9744c28adf2ae892f684db2a8ee. 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/CH7812198039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24884305ab403516a32be806984adfb3a2863fe13ccb0f882d6493a31d43a657. 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/CH7812234598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c4056ab586705aaa1ebad1954cfbf46677ad2bded17ce660d00777ea72eabe. 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/CH7812195502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe442cb63749bc6524b78a574fdb0a71168414db0cac7d8682bb66ca4c28c196e. 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/CH7812054172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f63ac0cb1184ca18a05434bb7522be165891327858739b625c46421b12ccf8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CH7811932487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e921d0a8868f990309acba32c6613114913aef369d4548acbb9fc2a3cedf1c. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/DECE72102941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d09e4227f8795304afefb51278b12efadf9055914f96c1613190c1ce8f0ad47. 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/DEA622100405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b19becd5a10730aa92457dad4b55acf0a97a614c10ba35ef1c875e99c199767. 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/DEA622100185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe6b798ae0888df9e3c9398b303ff63d1f7e3489d521227906236ec4ba29ba4. 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/DEKF22200678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e921d0a8868f990309acba32c6613114913aef369d4548acbb9fc2a3cedf1c. 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/DECE72102941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e921d0a8868f990309acba32c6613114913aef369d4548acbb9fc2a3cedf1c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DECE72102941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb87a24a655753ae86c666357b32955bb1903d03bcc17328126b796694e9c2e92. 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/DEA622400036.