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 0x7be54da0b522112eba1a48ab489ec0a798386771b0b312e04abf588c8f11572c. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fff7cf21-44e5-4450-b249-5a602172a7a0.json and https://artists.proofprofile.net/proofs/artist/fff7cf21-44e5-4450-b249-5a602172a7a0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Song Remains (A Jazz Tribute To Led Zeppelin)
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 0x51827a567dff89a2bd6bbd4750176c46c2532b418922e96a57437fd29e372ad6. 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/DKRA72400102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82328ac535458d39c3c372a086af802185311008a4d092a1a393746d304f7f7e. 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/DKG7E2300303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4163e0537b8c88b13e2c1def8d0748c7f681614caee4d37656ca8cca7da4b17. 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/DKG7E2300302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7842824893dee5945b5cd4242feb6dbbdbb2d89869416cb8e93f698f8e9498. 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/DKBDB2101405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf234658cdd0bcff21faa50bf541d95352f33b018431c75f0034b01f42dc95d9. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/DKBDB1502501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f768580edd501e1b4620e5d92dc6e590ad34c9194963d3388b390a3ec27309f. 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/DKBDB1502502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e2ccc4d344c2d9b432954e20fa741e5bf3c9358f2446095c335709c81e2df5. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/DKBDB1502503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2edc1510f5fd2fa7a7ce361a0d97566abb04faad8e8a5c9db2305862f3c6467e. 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/DKBDB1502504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb03ccfa868564cb90c9c810730f597df7394f9347543cebe01819a54641db635. 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/DKBDB1502505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9955323d1a8e22bb7650fba169a0b0cac4ac720b1d71a6786785b282f08a69b. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DKBDB1502506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf6ff92d13157b46c3f5660dd5ca4891746b03a9fdd3cb1dd68f900fdc6381d. 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/DKBDB1502507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb7a1e21b449a7a85497610ad2bceb6661bce9a3624c45979d640012f33e3a1. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DKBDB1502508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x769134931ae934427424152d101dec4c9bfd507fa631ada428d7ec19b2b4630c. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/DKBDB1502509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3412f4bd04879dc0b07d9d112d538d5fc77cc87354c9913c22224fbc27606a17. 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/DKBDB1502510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4163e0537b8c88b13e2c1def8d0748c7f681614caee4d37656ca8cca7da4b17. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DKG7E2300302.