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 0x2cb6b1c787f91177206c3e2599d71348f6560d0d183ddc0b4b6a1fb15c90867a. 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/3a704772-dcbb-42a9-bcda-00ad02e7f9a5.json and https://artists.proofprofile.net/proofs/artist/3a704772-dcbb-42a9-bcda-00ad02e7f9a5.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 0xc4d3cc5bc4354ba5d1fe0985cd0cbaf34d302b15f465afdb972844251439672a. 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/GBUM71404877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824bf2a4a1726e97584bc568180def6a6ccf44aeea2d819a9fa07527f4908a33. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/UKHF72400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c5b6c9c3535696b29946673274ce843850fe1d4c4fdd30c7e56284008de0de. 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/DGA062287182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ce49d4051dc6f74d3f07bc10f39c292e6a4d974b2a5decca4f9942994b1971. 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/UKAQK1500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b3711c4d449324c23adbf093bd6c3750c1c4403f7fbea84bdc587db7ff1625a. 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/UKNGC2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0893107a2531462ce99a7cb4f2d9f7abce02d0be7935458244ed13680d49b6d. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/UKNGC2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae592021d332dea6e6d0f075e3a2a13f841f68a0e2289983c564a457cb3740d1. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/UKNGC2200029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf17d5add1efca7cd549181e6ec2989aea1e63e2e5c3f5e59aea64e74f27d436. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/UKNGC2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca959e18317bf3629420e8b7630cf9ee4076e623b3904e4b393a215c1ba96d4d. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/UKNGC2100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea313dad594b93ecfbfd7e3f80060caf8f0a627ac1dda9a8fa4f8bfe1e988e9. 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/UKNGC2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7a7a550b59bccbf434bbcb0f497ed0f1372ce09dd90a0109f6ac4d8a1ff155. Chain 2 (Bitcoin): anchored in block 960231 (2026-07-30T08:33:28Z), 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/UKNGC2200027.
League Of Our Own / / / Target Practice 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06768f21c38dc8fc427aeb260a71dbeca5a067cbe328908afa486bc4989a47f8. 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/UKNGC2100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a621f1811a9ce0dbcf4d6329db207fe28eea099a8ac9bb13989e3b66f19b0b. 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/UKNGC2100001.