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 0x5f398a5cb2fed5ce2eb51a3f8ea0e1e0175f4f86e15bdfd94c1c66e2c5aa8ce1. Chain 2 (Bitcoin): anchored in block 954659 (2026-06-21T06:14:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dcf50664-6a88-43e7-8711-04ccdedd1a6a.json and https://artists.proofprofile.net/proofs/artist/dcf50664-6a88-43e7-8711-04ccdedd1a6a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Working On A Miracle (From “American Song Contest”)
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 0xa79167e605413c7614f407fb9f21c69717a08416f15d278f9b9d231cc796d0ba. 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/USAT22202957.
A Bit Of Both (From “American Song Contest”)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0424ade2849c6c785a0e7e14272f55210e949f217785a73efe0aeb0104c82bef. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USAT22202971.
Plenty Love (From “American Song Contest”)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a889009dda4309896dd23faa0a272b9f957f838a6ad08bd5ec47b37950e99d1. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USAT22202974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c42347e7bc596b73102eb5d88428e1f01ac7ed216144c233715fb3283827f0a. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/USAT22202977.
Shameless (From “American Song Contest”)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c3018019041082e4d54e872ff66fa013e5fbc4303f74f6cb4a6fd59683bb8e. 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/USAT22202980.
From La Finikera (From “American Song Contest”)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d409c822eeeb6ec616399be555fef73cc5933076a71021c50712e4e5e9c62e. 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/USUM72204515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd2efa3e8acf912ec514116db6304c16cab94ecd187a9544768fa24d0f509d7. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USAT22202986.
I Like It (From “American Song Contest”)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5335ce84bb356e552b25a3282b43e3e7ded988862fc43f6235980eaf1ccd48ff. 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/USAT22202989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358666e09d782e252dd9586ad3a4f0f7d927d2664d430afd0d521d083a92b51a. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/USAT22202992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9894ddf79b6a40e8da9d6e346c712b73765df27e3a8edcc9164757269162952f. 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/USAT22202995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c42347e7bc596b73102eb5d88428e1f01ac7ed216144c233715fb3283827f0a. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/USAT22202977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e2e4bc791df7a947363cc9124ce0298e1f1055b9fa610dc6ed7e371f81f69c. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/QZHN32304397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d7f0235aeb96615dc8376aac2d52759018b4e98589a73f79450e5f09be5444a. 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/QZHN32304398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a1a90d1dfd2222071929f6ad27dbb99e25c7a9b88dbc9a4b1f6887a29540db. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZHN32304399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x096fc5b3b0c2fe1bda9e4aa21f706017e6c1c4825e601fc487f347f5263d5591. 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/QZES72302084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ea5ea121195fed657e2c274f8dfd74bff2a25413aa088d71005cffbea546ad. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/QZHN32304400.