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 0x835692e8bccabe88e5ad191e0f0fb4baf7f095ed3a4b374b1131243ece52c117. 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/a8ff54a1-0b3c-4068-a384-d81e96f1cbd2.json and https://artists.proofprofile.net/proofs/artist/a8ff54a1-0b3c-4068-a384-d81e96f1cbd2.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 0xc7feecc56863245b409907381d4906f271643f71c263897b3952e62476ed3507. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DKABA0700025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd69253af96ed9250ab54b6de4a1827d1be14e7395aca1b3b8bb19d9924b73a. 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/USWD11994907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb38c3da9afff0d87d508e6bc60ccfeba9b2bbc721c4c7dcffb283bd499fb6d9b. 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/USWD11366670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ea0428a191bd045fd549f79195795bba3c2d1a037bbdd14b42909dde5fef61. 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/DKABA0400605.
Let It Go The Complete Set (From “Frozen”)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb38c3da9afff0d87d508e6bc60ccfeba9b2bbc721c4c7dcffb283bd499fb6d9b. 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/USWD11366670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2eafb13d53de42847c8fc6090c15fe1499350ae544e71c15235a66496331a7b. 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/DK4YA0901201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7b05a8ef91954e9311e532a6fdec4d5dd5c023477464920ae3a19f2c260a8e. 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/DK4YA0901203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda82b7769094224d9322c5d485c917b36feceebdbcb5246dfb13a82f991b810. 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/DK4YA0901208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73db5bf8a6003daf8a09fc25cbbcb83315a3831060dfedd98e61ae4f61229196. 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/DK4YA0901210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd80041c32ee9c36123cafbcee7e9e02ae7f2d29ae89c959ddf28cecd52eeb0. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/DK4YA0901216.
Medley: Jeg Vil La' Lyset Brænde / Mine Øje De Skal Se
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dfed998d3b9f5b8853ba9cc1582867e19170f1100f20ce8c42ff5f81b1d4282. 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/DK4YA0901218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f072215257194b44f38c6c8c9ef444a739662db7bfa7f402163688070aeb5e4. 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/DK4YA1106910.