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 0x840d117ee124f16a99b07ea782356b872fc3e43a0df07c69c1e55e3229aa82e7. 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/eef151f3-e9eb-46dc-823d-1ce0af7e5f9d.json and https://artists.proofprofile.net/proofs/artist/eef151f3-e9eb-46dc-823d-1ce0af7e5f9d.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 0x8a98b3e7f95a63908bb46f2e702567a3ca52e02ca44cce75f673ad37531a1f28. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/CAQRK2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a98b3e7f95a63908bb46f2e702567a3ca52e02ca44cce75f673ad37531a1f28. 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/CAQRK2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe715c65c90486d2313d9f1196daca6e6fe5f8d50ad7f17dbc6a2052a76258254. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:06:12Z), 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/CAQRK2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x718d9d080378d0d39cc9c2081132c547a3fcb1e8be22263ddf4bf41680fecc39. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:00:49Z), 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/CAQRK2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4a287424c374ef8f2067bb991ec1e8d1e66114758d48211674f419c4ed1a31. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/CAQRK2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be2f82be51865ada5ec23353077dbbf4903e9eba54aae8568ff0afd14a4813c. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QM6P42458479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429e03ac54a544a045911bd10e26ee81b9a88e284a9e49df07eab12641120a12. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QM6P42458487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be2f82be51865ada5ec23353077dbbf4903e9eba54aae8568ff0afd14a4813c. 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/QM6P42458479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b55695e71e3979fc89b1e2cf1b2f0b3756bc0dc3b908c29e8651f836b8e307. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QM6P42458482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51eca2d23c3c43070ba28951289ebf085509f017e449e293471c97dc42d90753. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/QM6P42458484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfbaf857c9b8c95bc32a3bd73397f4a027ba01e6f692972156699329e158559f. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:43:09Z), 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/QM6P42458485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429e03ac54a544a045911bd10e26ee81b9a88e284a9e49df07eab12641120a12. 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/QM6P42458487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2430f72ecb29e49511b0610085fba166dcf1024af0a9a2e0ad70151c26aed4cb. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:45:51Z), 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/QM6MZ2532884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc0dc3e4a04f097f483b3991d2e67b24d476ee22ef0d0dcfa4c62ed970cf4d1. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QM6P42458488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dac7502f6bec62eeb1f214a23dd43b949d2d2b36ebcf4973eae1fec18bd086f. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:52:26Z), 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/QMFMF2440714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb32ab0eef54c11be8d2a9be5d2da8a3a651e485fd6c437a2eecee2b24364f722. 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/QZTB72395741.