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 0x73848d5a40b86d9228322e8188e8e8e4d2d4b5280cb9b5f3c371cfc3fe802e0d. Chain 2 (Bitcoin): anchored in block 953882 (2026-06-16T03:13:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0a81581f-4730-4b9a-ac45-7944a6254a38.json and https://artists.proofprofile.net/proofs/artist/0a81581f-4730-4b9a-ac45-7944a6254a38.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 0x7d29bacc5ebe4f9c9f5ed2fad546197e41cf0f7d0ad66ea35a99612b50550fa6. 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/USBC19200705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea4ef21f23f2444830211985d2df712ca6cc16e133402ddb1b4b99303479ec4. 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/USBC19200706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a447531670226ee55f8e86ae69bb337fd056d25d7b9e8e9db84c6e434d643f. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/USBC19200707.
New Hampshire Hornpipe (from "On Golden Pond")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2720aa1678bc426b3c583cf3b4c3472fce1de876dae417e8ad2cb916bcc28cf6. 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/USBC19200708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc18592cc6addbcf2a7c447f50bb91e34d9d9d4c53d3b1d4c3b6c857203b0ee6c. 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/USBC19200709.
Somewhere Out There (from "An American Tail")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe17a6bd67a786809fc4e07910454aa052a48b701811e2748d1a123b83d30e32d. 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/USBC19710064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32eb180301d3676b2877614dfd3ccf5cce58556a0c9431d5967dd54417725cec. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USBC19200283.
Never On Sunday / Theme from Zorba the Greek
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b859c5760421e778dc3d312201189dfcc780be1cea214c0613483734c9f48d. 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/USBC19200929.
I Will Wait For You (From "The Umbrellas of Cherbourg")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5a1d80cfe5668b0eada19a330ac73d84b19b7ed3fb7997a12ddde745d44339. 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/USBC10001209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9110907adbba0d5838981f4f05b15da33b0a2c2002859327c2bdd42831f47593. 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/USBC19710059.
Over the Rainbow / We're Off to See the Wizard (from The Wizard Of Oz)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a688c4b5f2b092c80ca9d07f47fc264f73b0f6c77d7e127eeb9a18b48b70f01. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USBC19200930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9b49783ec65a0bd29bd215ae85bce41de9049ba522b75ccdd0a7982826d0f8. 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/USBC19200711.
The Godfather Suite: Love Theme from The Godfather ("Speak Softly Love") - Godfather Tarantella
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d1e331ed71e19c16c781c2fdea74b39a96bc1fd13b345cad2a9e91a0fa2850. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/USBC19200931.
Somewhere In My Memory (from "Home Alone 2")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2291f97209cc5ee04235d614072fcf6ebb0be71d7ff703b12968b6db5fcf705. 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/USBC19200712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50fc232ddbf338ce64b36afcaca5bf06bf3c53d8882c33a7d5eb0af29a47ccd. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/USBC19200284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad8ad3f1eaaaa4e2aca0107729b42c801a90d5ec7c670b6226b24a7f4146247. 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/USBC19200713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf521672a5c593dae5619a85ccd86ec61c731383b6875ba1b3c36430535cd8e9c. 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/USBC19200714.