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 0x42bf7c6f2a92d63dea6e9dab020262e32d50b50b929a70985c31f8ec898c8cfc. 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/b85c76f8-d4fa-470e-a77b-7eaf666a731a.json and https://artists.proofprofile.net/proofs/artist/b85c76f8-d4fa-470e-a77b-7eaf666a731a.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 0x1f44d4c89f4c88e5c70fcbb56f1b07d0cb7b9fcb93113b5d39bc7e702d7d0120. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:34:46Z), 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/USY242485915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c69ad1ee44dd7c637aca48a6caf3f42254676faacf16275b8c3e9c6f1af11e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:51:08Z), 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/USY242485916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc815af7076f1c28f9342ba72f38c043dc314ce9847d3a03b0a4c1eece3b06bd7. 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/USY242485917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe393659bac1d82168d218ab056b7c4c533eb967cda547e336a89b41d6fabb58. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/USY242485918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf40bf96d0792ef96b587251c760ae361eeeafd9d317d1d7de570a20af3acf4. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:37:41Z), 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/USY242485919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dac59a5f4865d536c0e3a19f80fae71765304b4f124fd1dc3ad690f0a92465b. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/USY242485920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe79bb3135b44176165b21d6e9cba1d5390a9d7db95b2aef9f96b81bc1b5a8704. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/USY242485921.
Nocturne, Op. 9 No. 2 in E-Flat Major: I.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9055275ef2481c82a6b6a5f89ed99ab3acdcb93923a22eabe58ed7bada77946a. 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/USY242485922.
Nocturne Op. 9 No. 2 in E-Flat Major: II.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e061dc7a1b1d060c92946016f44559213f2d0f9bfc62a7c50d3d3925119456. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/USY242485923.
Nocturne Op. 9 No. 2 in E-Flat Major: III.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ed211af2f1950e0fdefae53d7adc95b9252ce7bfac29e13c7d799e9173999b. 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/USY242485924.
Nocturne Op. 9 No. 2 in E-Flat Major: IV.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ab6b9d957be8704a4e09de2aaf9ab4ef072675978aa2af26f9953c038130c2. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/USY242485925.
Nocturne Op. 9 No. 2 in E-Flat Major: V.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df14b112a9ecb188c32309ddaaae6c0b308630cec962498404ac6298f9ffaf2. 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/USY242485926.
Grande Valse Brillante in E-Flat Major, Op. 18: I.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe4a333b049236eb57f8eb14d5f22bb877fff5e559e4fabad7c2a7cba73d4177. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/USY242485927.
Grande Valse Brillante in E-Flat Major, Op. 18: II.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462741c4fbd686e54d4e512c2248c9c19c56d597b661dcfda676594896c05441. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:30:47Z), 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/USY242485928.
Grande Valse Brillante in E-Flat Major, Op. 18: III.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2bfa9d7895af163c672756c2306a71024622009158716366d544bc48491e076. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:59:25Z), 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/USY242485929.
Grande Valse Brillante in E-Flat Major, Op. 18: IV.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7779415a5e8e41d85d9f1da0d4e431750641747226024762c0c649d240c343c. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:23:21Z), 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/USY242485930.
Grande Valse Brillante in E-Flat Major, Op. 18: V.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde931770bb4eb1dfd14d874953f965a2650494f4d62183b7047f5a7ae8ceafb. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/USY242485931.
Grande Valse Brillante in E-Flat Major, Op. 18: VI.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf3e158ad10bdfbad0ad082c58c895f2a0b51debf90bb5d75e01b61ee590d0b7. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:06:01Z), 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/USY242485932.
Grande Valse Brillante in E-Flat Major, Op. 18: VII.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b1f3600b13e504b8de1ade885dc211e4396c8a616e1e7060a13bf658505fe45. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/USY242485933.
Grande Valse Brillante in E-Flat Major, Op. 18: VIII.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d601d1981bb86acad534459fea817168a58f9aceee82810dacc743a370f90c. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/USY242485934.
Grande Valse Brillante in E-Flat Major, Op. 18: IX.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cdb8d842e1d3716fed8f223954b41740493f3674b289471a737787fe6525fc1. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/USY242485935.
Grande Valse Brillante in E-Flat Major, Op. 18: X.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x503e7470c37beec383990c363f2a0cf222d44a93c0b7bbcf82f8c11ce4aa9478. 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/USY242485936.
Grande Valse Brillante in E-Flat Major, Op. 18: XI.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f058ed6c50ec68252fc37f6e59ee8d16278919961e53e6f076a4b3a3f9cfce7. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/USY242485937.
Grande Valse Brillante in E-Flat Major, Op. 18: XII.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf905e879a7044506633fcd3f5a9872e13388d04cae6edaedbe6aaf4b4aace0. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/USY242485938.