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 0x0d26293eb7f466d9fa33b4989d1e853d45112295ddea32cd349e8f74e58b7476. 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/8d131914-bf88-4afe-b7d0-faefbe6c4152.json and https://artists.proofprofile.net/proofs/artist/8d131914-bf88-4afe-b7d0-faefbe6c4152.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 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 0xf9bcc82d0bc55d72a3d005312d2680fe8c9f360e7c031afb10f12c9afc07dae2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CHUM71100512.
Lay Low - Duett-Version, aus "Sing meinen Song, Vol. 3"
Sing meinen Song - Das Schweizer Tauschkonzert, Die schönsten Duette
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924aebdd3bd0d6fca9817b1b4d4503df3d52bfecd868a2fb394695f06e2d04a0. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/CH0832200530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6e61d2e87f2deef6c3e74a8ba3fce50699e4a455c977f08493b95d01f14e7a. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/CHUM71400426.
Saint Profit - aus "Sing meinen Song, Vol. 3"
Sing meinen Song - Das Schweizer Tauschkonzert, Vol. 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5448b3f33472310b4e7e5d2a2c8e4e3ce3588817765c7d376faea3738c8c9d56. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/CH0832200100.
Dreamer's Heart (Verträumtes Herz) - aus "Sing meinen Song, Vol. 3"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca10b8d73100cf37c6c7eff36a8a596fefda32575052af9f494d175258f50c22. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CH0832200170.
Limitless - aus "Sing meinen Song, Vol. 3"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057065ea637bfdb1be91f84673fb3d40fd101c33bd2f01818e48dbc82a996b74. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/CH0832200200.
In My Town (Miin Ort) - aus "Sing meinen Song, Vol. 3"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x655e80a1be9fa8d02390dda2ffb400071d3f6bf8e7dc4b4ee01c60f43423967c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CH0832200270.
Hey World - aus "Sing meinen Song, Vol. 3"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a05ea36773271205f173cc6a7e9e0e7479337816b902d62898147462c962a57. 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/CH0832200310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee1e9c5b452def477d762b7f439408dd885d28df86ad462bb0dc498298de01a. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/CH0832200470.
Limitless - Duett-Version, aus "Sing meinen Song, Vol. 3"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e433a4148f99649fbab8a246e0b68eed6b3cef5273cd8cfddd8ca556d52bc6. 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/CH0832200510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924aebdd3bd0d6fca9817b1b4d4503df3d52bfecd868a2fb394695f06e2d04a0. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/CH0832200530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb1f58d3c7be2ba029b38ef3b46dd7073dad2ef9cf50cb40c12a6d24e08433f. 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/CHUM71200413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a4baa4116136fac86baf5d8dfe881fc4a8a374ad9b71f015675ff2097be290. 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/CHUM71200414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca793e2f22524cd67c00f083a195cb062b14ec4b08bf107e232a23fd4cb4788. 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/CHUM71200417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d520cddc5a0ab5b1368e68fec91fea94401b04e0550cc29b121a799effb070. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/CHUM71200416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b55d105960cf66e5634ca484e68e4cc109f1515c1e19ea8057b19551f1d3893. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/CHUM71200415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f1da37252353c3abb73c227d42d21881b8ddb12ca5af3b61ea2d2acfb2d75e. 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/CH4882101003.
Sex & Sunshine - DJ Antoine vs Mad Mark 2k21 Mix
Sex & Sunshine (DJ Antoine vs Mad Mark 2k21 Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af50419ec7309af6b3e73510504acdfdc183c1624b3f75ba49d7cef7175fcc9. 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/CH4882101001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f344a3c37deb9745f776bf2c78228c649f469066cc822d295613ce91204973. 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/CHUM72300193.