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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd751cee9fdf4479e5c87350144ced733af4b1f3ae7142aa8d5e92691277a107. 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/67a654bd-376b-4a81-a8ef-e07911bcfbed.json and https://artists.proofprofile.net/proofs/artist/67a654bd-376b-4a81-a8ef-e07911bcfbed.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b69d87356350928b55524dfee24959f5530a9c72f04ad7eb55420ad50c65dee. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USI4R0707879.
Whitecaps On The Hudson (Deluxe Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0cea72cecdae60a5d882e58ece2c35c07fb951459c03adffc5db258cac95a1b. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:03:07Z), 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/QMN5H1200101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a2bf60efa9d6398cf9813b418461deca9fa8103d8474afadabec870cf7cdb7c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QMN5H1200102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49740c6304aa40a5daf7516547f64c908456c06a8d717bf871cbcba89ccefa6f. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QMN5H1200103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe006046c11f01ffb7ea6ee7e3b9391bd2cce59746256b602894e92d0b3644fb4. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QMN5H1200104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2586c56839527f15cf58b68765eca2b5c4a05406fa866d2a5c87972b4ea43f0b. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T01:00:28Z), 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/QMN5H1200105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887a28d4f9f6f041be1f665813212f74196e6b21e184e904155d3671ece51fe7. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QMN5H1200106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70288290dec09a3c3c1313d20a9d86884885f5d47b6103b30904311aa8b97c2. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T10:41:26Z), 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/QMN5H1200107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff5b0e016a406f6b429ef2661f50c5ebcb48e4c1ee37dbc9dec3c49aefbc0206. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QMN5H1200108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d49fe9ffead8f621c76520f523d8e503c36b163d53c209328837508aa43d70. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QMN5H1200109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1a42ef2827dc568f7cefaf225add45179f42e037b2ed32e2a8f612afbde17b. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T11:05:19Z), 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/QMN5H1200110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ecea6bcb85831f1ab203a17ed4df23d8ebf253ce8723b9ad5031ca22746132. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QMN5H1200111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543504252d5612be62b9681eeb5250abe0dc55dc5c1a4f6c592544a21e5cc485. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QMN5H1200112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24c7d46ca071680801367d3de26648fda298e9a301f42a9abbae2adadbc4fad6. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QMN5H1200113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ca37ebd732fa87eea1447bd4b94432ef0d2ea91ea17875c6c719e48070cd18. 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/USDNA2500332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bddc15bd713c1f05bce83055d5e6931987490abdd964aa35d6aff8ff030fc62. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USDNA2500333.
The Greene Street Sessions (Deluxe Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaba6219843d5627b08e2140d4e909fbe40922f0cc1a240eb9ca2b69b1d372b9. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USDNA2500131.
The War: A Ken Burns Film - The Soundtrack
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8793619a01dc04465becd0f8294a45f716a2295b1c255bd996b0fb55d151df43. 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/USSM10703324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b156fc9af6cf3a79de9d9a62a7d4053edca354dee913cb0801a91d3354268c. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/USLD90815908.
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