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 0xeeef1f1a5dad24bb395154172e28f35f26926bfd2ef8ab753cac92927a899d6a. 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/84e8d1ba-f8b4-4805-bdce-28818e72e3a1.json and https://artists.proofprofile.net/proofs/artist/84e8d1ba-f8b4-4805-bdce-28818e72e3a1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Duck Song (The Duck And The Lemonade Stand)
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 0x2659f17cad31d048eae37de25ebda77bd6d60e6a2be73c30638d6df3895e6147. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/TCAAX1196118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa994bcdf61a9d96dc503a7cbbd33b4d8d326d4b0267ee25f6a552f16568070c9. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/TCAAX1196130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ab339369a1da71acdc4145911dce0c341e7acf1cf4c223f3c0a9bbcee22ee3. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAAX1196135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40e6b15179777c00b39c4f14a4d67693defe106f46cf4ae65eaf893ba77e428. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/TCAAX1196143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1193124bfcb7e3022fe5dea9131506750fc30659ec649b6d26a6e9b9264892db. 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/TCAAX1196158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a1eb588eb707f11c3deec68def23714862620e5e1da2c2e3819c9b579f3dee2. 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/TCAAX1196223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2356648afbc0e36c887a0226e0c906f57d3f253a7b9b58d64d59ae75dee2396. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/TCAAX1196225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf7876b02a1b1850b68a90a9c93003f872c0b1ef459a55ee58b15d438709937. Chain 2 (Bitcoin): anchored in block 958676 (2026-07-19T05:43:13Z), 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/TCAAX1196228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1aba6f49bc8cbac4cbceb0ef7aa95bf4a572a8aae30ac5ddf91eeff5958701. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/TCAAX1196235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead7f4cade12e0c2dbc6cf599974c4d61328661b423dc0b6983d4e6fabb66e3f. 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/TCAAX1196239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8afeb04f1ac065ba79b7c414cbacc8f549271df7d65ca62de14797721d8f0e0b. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/TCAAX1196246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf479a291dc24aaee899308fab14f17c4ef17547547be530213981b5c8d281d05. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/TCABL1371979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c9acda0cdaafa22472b6964c86ff0ae996accf5dd49a1cdccc20bfc7e60594. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCABL1371982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8e0a1e099c94a36cd96a6e14903efc2e79a8d36c7be392bbf61bf77c3f5ff8. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/TCABL1371983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b40f9b7e0864106062dc255e413218108eae7777940850db0366fe4f1d53f5. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/TCABL1371986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d680d8ed51028e1e39d33a338de4e56ceaefb08ba44241fa3a11f6bfc1b4e25. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TCACQ1668599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e8e28a9684788011a3dc1d589b4a147eff374bcf5a4bd577adadc4915043b5. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/TCACQ1668606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa253a5aa49f70cfa062694af4fcc0e3585f2311da77a8ff2da8be20b894ee04. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/TCACQ1668611.
The Christmas Duck Song (Instrumental Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87259a0beeb0eca533c4d36cc002ea9217d0f37a12a5ea360be7cc0f48f0bc1b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZS632403619.
THE DUCK SONG (Modernmadeit Remix) - Sped Up
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f6acc6c400d5f245bced9b46722cee3e6444a4ae664d6670ba8e30de8e5e325. 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/QZS632451898.
The Long Duck Song (Duck Songs 1 Thru 5 Together)