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 0xda14de2792f1ccae1d5dbdb01db302f54c601bccffe513c8d4f3b12362959d6d. 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/fa4126a4-c954-4af5-bb41-218b8498d33c.json and https://artists.proofprofile.net/proofs/artist/fa4126a4-c954-4af5-bb41-218b8498d33c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
How To Train Your Dragon: Homecoming (Original Soundtrack)
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 0xacab2b51f2cbaaa59559959273f820bd6769b6759b099eef92ff0f87eb39f204. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/USQ4E1905133.
How to Train Your Dragon: Homecoming (Original Soundtrack)
Promising Young Woman (Original Motion Picture Score)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ef5cf217a0623a76981ad3af503b70f3dd3472e317d54f78daec47d01d516c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USQ4E2006325.
What Happened to Jones? (Original Motion Picture Soundtrack)
Memories from the Hidden World (From "How to Train Your Dragon: Homecoming")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b809f730797c7a0c0679b5a118b3809e2435b23cf6792a6367c7a17337c953. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/QZBSZ2100101.
M3gan (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3cf6d632e353cb444fc218525b415b3b1d47f04bac1754e43d33ffb45d18963. 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/USQ4E2203671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88018f91bae4be31e16146a089f1c07a82be431e58ec747d16aff82b05350640. 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/USQ4E2203672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd0f73b1cf19fc276226272aa0a5ddc3d19af9b0db65ee4d259846ca4fa7528. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/USQ4E2203673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa56bcf4a13d578f4dabc59becd6c94d45ea88668822a76fa64bb0dacd191e9. 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/USQ4E2203674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fec2c39255c4ba5fec349b5d77d834788dabc7291a943a366afc4427afd8512. 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/USQ4E2203675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833a9c1c5dd462e1d74817f0ddf6e92503b65e440d7e5ee3e3fe315dc86826b5. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/USQ4E2203676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d68f7cb162d7b58092c06ae61f7822efa69b2b12671f63b068dfbee14d556d1. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/USQ4E2203677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc11133490b65cdcb71cec8df2e874ea93982b7a5cc66d67c4e1ddfa5cc0577a2. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/USQ4E2203678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06226f8e6b644e0881a8c495601c867075558c318aeb99df77071addb343d87. 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/USQ4E2203679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556c752dd8f8b6bab018eb79fa5334360fedb45b159deb8e5860a0e99c8d2712. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/USQ4E2203680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e579fd0e4b0664f57cbb88323ab311821ff927ea5ef722122d5495efbdbe13. 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/USQ4E2203681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1a408df314a311b54de7a481b7bf5f13cccfddaa2e7bd222ed74133d1409cc. 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/USQ4E2203682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec0015be96eeda538fff87b46fce3c00df0f009833c2983f2d4593764ee159a. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USQ4E2203683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed8174c5046d86d04b876c47400a6d434602ef36b459dd4f870f967495fa574. 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/USQ4E2203684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82dc36a60e15e0b419c1aff0d04bc0051b86a94ecd866bdded3f9115caf5d91c. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/USQ4E2203685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea9c2ca9c9f87eab69690321f269e7b1a4cb12de40237b59774b49dff8fc253. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USQ4E2203686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d9eeff03ad1136c94bda585e6058bcaa101cce1a68f10240c7162e28db27eb6. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USQ4E2203687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c27334bbf29c008cea068558d957e0f73066b2f05d459ad13fded764fa9b27. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USQ4E2203688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30213c1cbbc5dd881074584a50fdc3b39f63c5fcd294c190491c7d78509be17. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USQ4E2203689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x522f6f687de7ed15fbb76194baee96b2f656c2bde78e6bdf178d4340d21fa8d2. 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/USQ4E2203690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de9ac8d92324dd898e704f2680f2318adcf8a960e249924c915ddf253963e6f. 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/USQ4E2203691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0209a8e135963897c31c4948e54ed2b3d8858ddc50a4b5501670ac627514380. 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/USQ4E2203692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260d6b206eed9d16d635fcb920089a6c0afe5cfe768ddaa473ef5d4a06d45dbc. 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/USQ4E2203693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcabaffedf153c2623267ee76c34973f9e74852ae829c8ea208108d5c7e5d95e1. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/USQ4E2203694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf56921b8dfe8526fdbb3675cc0cf2cc9e72b9c3341f69ca90855f1e9529b818b. 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/USQ4E2203695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8f04bff421834050fd065e7140a50b030bf0e7eb1e5104c22e5bf2ab4e71cc. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USQ4E2203696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ed42bae0d99a3e0da075882fb9e1aa1d413cf4aa88b371e1f5121e85b51c4d. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USQ4E2203697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e9b769d10c8392b0d8c03607c0a324c5f78190a91555dd7fff2a0ae5cd194cf. 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/USQ4E2203698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302a27a422b8a5ef3b769ee83be63c11c1d1916785e2e17c2a82f94b76f71150. 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/USQ4E2203699.
Saltburn (Original Motion Picture Score)