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 0x9b3ceeee48cf9dd83992c9a32820b540788dca0fd7d05962f71916e421d8f739. 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/3a58f004-1304-49fb-b0f1-b290f841055c.json and https://artists.proofprofile.net/proofs/artist/3a58f004-1304-49fb-b0f1-b290f841055c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Essential Classics, Vol. 345: Berthe Sylva
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 0x3ed9e619ed88b0b109e85c51e629ec5362855c00a2b798c632f2f47a6c369358. 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/FR6V80289118.
L'Essentiel de Berthe Sylva (Mono Version)
Berthe Sylva En 30 Titres (Mono Version)
L'intégrale de Berthe Sylva (Mono Version)
Meilleure collection française: Le meilleur de Berthe Sylva
Ladies First! Chanson Collection, Vol. 9
Du Caf' Conc au Music-Hall (1900-1950) en 50 volumes - Vol. 14/50
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37bc474863a918ab25e02a64c1755ec76186109bf1b2b2d6c01e0d30d4a5a2d1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR6V81241807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d982a60afd53828452a4658a41c8c926b990bf00962e1fb2f2293fb408a08be. 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/FR6V80010360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61264570961c715aeab4cffbc72862bc6122eea8e27d6a3a58c7ade04321fb6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR6V80010365.
Les Inoubliables De La Chanson Française Vol. 9 — Berthe Sylva (Les Années Frou-Frou)
Les Inoubliables De La Chanson Française Vol. 10 — Berthe Sylva (Les Années Frou-Frou)
The French Song Berthe Sylva Recordings 1927 - 1935
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2157ec7f2fc42303b765b3c956334c87d4c24b314a9d2cf5b71abad3ab7429e. 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/GRHR11094703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe87273c303fe356319e573ff3102bc951b4a0b5f64ee37191fb86baf6f9bf9. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/GRHR11094708.
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 0xd4e5f894eb55092aa302f2e6f78015a351299e8fd8723cd5907c09e2df34af5c. 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/FR6V81091186.
Traditional french stars - les roses blanches
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e0f9d4eb2f9619b2a072b2348ee2fa02c856ce6c67d2da895c72b882bebcdf5. 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/FR6V89200421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7adb2c2ddd1cb97654737521efa7e05bd3d48b247cc8e6364a8cb18526366c9a. 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/FR6V89200422.
Les meilleurs artistes des chansons populairesde France - Berthe Sylva
La légende des flots bleus (Mono Version)
Frou-Frou et 29 succès de Berthe Sylva (Chanson française)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba1127c5a0d06a24e02758d558610c5aa31e6a0f8ee5b58b3647332da6f6453. 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/GBBXS1020832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6ee4824a99e9f2a01277e77e5aee09568a6f4a85bfc519fe6dd4cf2f32bd0c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBBXS1020833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0cf36195ede9b0a6012dbb48f42edecba570c97a3d77311fa408c03f57949f. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBBXS1020835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d518b25f17072474ec54ecb487e4fe3f15dee5934a58a3cfdde6d1e2d65625. 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/GBBXS1020836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e102c21f77d5e2d33e9afdb7cd6e480bc0fb8e6d4d55661a80e02b4de93c26. 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/GBBXS1020838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d35342a26d0b5d52f0688e61b4ae88a56e084f2b6623dfc575512bbe52d4bea. 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/GBBXS1020841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf92a05651ce87b7258b74c4dbd020dc8efcc1e76b4ddeabd409186cba919c2a9. 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/GBBXS1020846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549619e68090443f7bba32b39bfc5004a8b989e68717db447d54846eed43dc67. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/GBBXS1020834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb955028583337bd4d648138481b8f29215488711ad1667ff41d22d7e1f14082. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/GBBXS1020844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba38a4158cd3cf9392ced1145fcbee30d0464171c7202de7a1349e2d250d950e. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/GBBXS1020849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802cacbbd6004afa83fd7bb9794b69ee80ea116e95a3a23c3ae1f5d5a3110882. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/GBBXS1020854.