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 0x5c7736b9c80fc8375ef6a272b47970da611657871f2f0446150d0ed1413cbf39. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4e923d37-1171-4d5b-80b2-944aea5e8ec5.json and https://artists.proofprofile.net/proofs/artist/4e923d37-1171-4d5b-80b2-944aea5e8ec5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Pictures (feat. Laurent Coulondre, Arthur Alard, Maxime Berton & Laura David)
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 0xa71c35e3cd4158fb3cc51b0f66ff774cea73864b3f176516694a516b3479d35b. 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/FR9W12149154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a90406aefa50916e6031c7895a15ec3dbfe32b7e645ed64b9b4cd514dd0e44. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR9W12149155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e79584ab5aa40d0ae878e845c1678e985773781de84ec335779d2487ceb8c9. 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/FR9W12149156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd402b04aace5e16c5d4a3da814b42f3bd2e6113b8a4c3af5076248e3f0cdc434. 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/FR9W12149160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1207d61fd579970a34e8665b20414f51241eb01d99133b2a48508f008cd17fcf. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR9W12149162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46ab09596157056813641d7ed3b7ca2a5a476eb58266591e9a74b898ab4576d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR9W12149163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e79584ab5aa40d0ae878e845c1678e985773781de84ec335779d2487ceb8c9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR9W12149156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a90406aefa50916e6031c7895a15ec3dbfe32b7e645ed64b9b4cd514dd0e44. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR9W12149155.
Escapades for Alto Saxophone and Orchestra from "Catch Me if You Can" - Movement I: Closing In
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9716b378f99fbe357de15117afdde8843b6cfc6896d3b13633eb65c74ce997f. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/FR9W12151189.
Scheherazade, Op. 35: II. "The Story of the Calender Prince"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3093e0897e3946ebca80e2c0ad12d7074e0e5fbd6cfd26ff9d6efcea0e7c7ab7. 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/FR9W12151192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996f1ff10e4936b6f8d035e72976222bb5f25997bf3facf9179585bc19becb57. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/FR9W12149157.
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 0xbbfc429846f8d10ddd0db83e71924e150b3bbf0c5506596bf7924e1c6d4bd4e5. 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/FR9W12149158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4321d31ecde4b95201ddc64f08b9cae0e04e3b14e53db809360c7cf104843598. 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/FR9W12149159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b6b0deef4689a498b859c66c795924e605b58a0bbb86bc21338fdb96ed6915. 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/FR9W12149161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ceb2c95e85304dccdd45a3bd449ca4b88f2bb3ce27c98cc96733538256e9470. 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/FR9W12149164.
The Throne Room from "Star Wars EP IV A New Hope"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a5b359f4d950f8964f1a5cc90468eb3e2914d467ff8753a8792db9974d664f. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/FR9W12151187.
The Medallion from "Indiana Jones and the Raiders of the Lost Arks"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873001167d0db73332edb211935e7dd579e8a83006b1151b2ee9f65a5c9edca3. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/FR9W12151188.
Marion's Theme from "Indiana Jones and the Raiders of the Lost Arks"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53850211ec940c6cfbdf1e56df761b801073c3bd607049c6bda6c3fc7bcf67e. 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/FR9W12151190.
Hedwig’s Theme from "Harry Potter and the Sorcerer’s Stone"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5a2053e0e34a1c9cb3de55b6e78d09ecc423f08c1236ff5ddb49814bc66c08. 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/FR9W12151191.
A Dream Is A Wish Your Heart Makes from "Walt Disney’s Cinderella"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xada6c2bf33bf63c30df37dabca6395637a566e13644029206a3aa9b177ad930e. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FR9W12151193.