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 0x1fc14ad8d846e814893794544b2172fced2fb04f1a113af37180179af93a4e61. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/743089fd-1a5e-4a29-9bc5-4fe72754c2dc.json and https://artists.proofprofile.net/proofs/artist/743089fd-1a5e-4a29-9bc5-4fe72754c2dc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Inferno (The Complete Original Motion Picture Soundtrack)
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 0x694d61665d5cf458b0f2eeada5cd2fd8eecda310586f19157a5e8fd90cc7d854. 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/ITC047901350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbdde4e30790d0d3e7141fe4770cc3092da05a87c4f95308907bf416ef5f29b3. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/ITC047901351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c7e63724c30311a4758bacbcfa069d849053ab145b6406bba744c6fa345d61. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/ITC047901352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf06bd50f479b034e7e0a41b74f5389eb1b65cbe6f32f139a3db4861a0f73af. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ITC047901353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543280fb6e1f17a4bed4c0c49d010b9d24722af4e22f274ef047daacf63db772. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/ITC047901354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0532b981d2b6074d519feec68b59b5dd9078f73cc3322af266701c9451d03d93. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/ITC047901355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x322609e6a7acbd1f5ff05b4a9390a0dc2424eabb55dcfc9c5d28e660cd0bb8a6. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/ITC047901356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324a342db478c1feff4ff40ac3bad04ff082a35f946e366f03b2fe249e17f7e1. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/ITC047901357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e15a9c531d4bc782a585623b54002f8c81e85696046bd7b6ef324e0fb734d46. 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/ITC047901358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x415660674e906b3f6cd52600566637d405772bdbecce8298567334fcc5dde571. 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/ITC047901359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92118fca9b24d1908c7cabd3105d317547299a4302c70146fe57d2352ff85f94. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/ITC047901360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9db216c15fc0d68485a2159e3f86cec34051a94645b17c4178934e70381f5fc. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/ITC047901361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6974c1b7b523353fe72730d5dad488d41879f192fa372db7c8ea76d402c234. 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/ITC047901362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22433364cc44f42180fb67590bfd486c83bc768a58bdb47fc217e968b71572d8. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/ITC047901363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91d07f2d69c98e1e244f0f429955d8e1ee7c0e072a99a4bfc295a362a64891a. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/ITC047901364.