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 0x21bf392223e7f6d9418cfa289fcdf6204c7bb493747f65d2ccdd3f9764ad4d9d. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5fbe7726-0346-4936-84bf-4349925fe41f.json and https://artists.proofprofile.net/proofs/artist/5fbe7726-0346-4936-84bf-4349925fe41f.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 0x96cfe037fd2bbaf5f993b5b250716b8980a03dd90eca07d656e6d890a227da4c. 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/FR7PC2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe71cafba7406609a2d8c6781cbb971fe2a4f55fdbc0681d29b06a196f18e76dd. 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/QM4TX1810475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df67bed1b39425250d81b9c96e748e5b6a9c99e86069282afa41dd3703c60b4. 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/QM4TX1810563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb9941fd8cffd810f73730795c45379955d09ec892f4e08ad41e1669ce7f1902. 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/FR7PC2000039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b9c3a39f895ed2c1d39fc7a210a279299d919afed98bfbcefe8731b48d41df. 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/FR7PC2000036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c9bcf59a06ab1bc4ce3c8ca173647118888a0170ee519859e98f6831dc1aa4. 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/FR7PC2000040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8867a79230d2424e2f36ef85a9d29f4652367c36bb5c98bc2412f2e0bdd28d32. 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/FR7PC2000042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a411972cc530928cc481664ba13dc49ef30481f42442a0f5ed162475b3b0d8. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/FR7PC1900024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea61bc539ad1f7b02ece8aed5a728fcd4b4236bcc9d44db50c14b673ad8bcfdc. 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/FR9W12367362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd817df0db34a6324b6c1d1bacd836c416dab681e6436d74fc096dcb8c7a1f62b. 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/FR9W12367361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea61bc539ad1f7b02ece8aed5a728fcd4b4236bcc9d44db50c14b673ad8bcfdc. 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/FR9W12367362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4794cf4eef840d62b7c5ecdde70bf2ec7374c9f65e6a87f79750bab06081a4. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FR9W12254970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a060d068f245d35e7c3560d488cffdb3cef466ead35fc800e5d85c3cfbf389. 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/FR9W12367363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a54407aba5e4526baef841edb6cb961a605d23d6381b49f5f7770970a2b35c. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/FXR052500022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371b75bae1f779a4cdb93b877670e79fb4eac5920f4b7eff19079c3822b828fa. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:39:33Z), 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/FXR052500034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524cc6aff22ea074c4854fa7941a31c56dfe4513e96e16aa454c4317f4a5b428. 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/FR2R02400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b3ed587f9f04fd9822fd07d73cdeb5ae60ec2d45a55b79a2e7284c62c47f9d. 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/FRPHC2300011.