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 0x573500b6456fc3aa259dc1825f0127981ce391c4861baa94f8f821d6c6c2f3b2. 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/be3c7988-2231-41a9-b8ef-6e65e976c7eb.json and https://artists.proofprofile.net/proofs/artist/be3c7988-2231-41a9-b8ef-6e65e976c7eb.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 0x7bc381ed322b437303344c3c46fefd0c3f1fa91fd24cb0d61b6c83231720979f. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/TR0331007669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1da2ed180d384b64b388fc161562cf8c7f9f75279efe60d41051883a968ec9d. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/TR0331007674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6878f0e6c2d27c6e2c5351c51e503adcd09c5b886c989e71823b8f13d86d7d8. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TR0331209139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa7697466e91576d132af5c75a52fbbf5415903769b735ff9925a54cda49c5d. 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/TR0331209140.
Air on G String From Orchestral Suite No.3 in D Major, BWV 1068
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2bb092f1f7eedc8b3ed141d61eb243bb7df99e3f7046181a06a41812afae829. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TR0331209141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a77546fee61c98b690d05324c38fd88dd4bfa8e32782a189888bf8587025e11. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/TR0331209144.
Buselik Beste 'Her Gördüğü Periye Gönül Müptela Olur'
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9479d5eef97d08da16b1c0aed0e0a3a20b084c35c692a6f0ca9402d0b0cb9d50. 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/TR0331209145.
Flute Sonata in E Flat Major, Sicilliano BWV 1031: 2nd Movement
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24c7e9feb1a26a6e958585c86e61417df85490ab1e8812748209aae68d7a3828. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/TR0331209146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36539c4c02c3bf49ed9eedfaa5b88fdf15ec37bd948d603428c2679a16b7bd39. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/TR0331209147.
Segah Yürük Semai 'Tut-i mucize-guyem ne desem laf değil'
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff768bd942879d70fafcf43f85d72307be6c2dff0f655f6e8d27ce4436b3b015. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/TR0331209149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x997ce820aef173730fb3be7e8342c850e57639cbf2de97ee7df22376e56b94c1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TR0332500034.
Sing Not to Me, Beautiful Maiden, Lied Op. 4, No. 4
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b2d956f01070039f80c5a7dbdc544c81f05d54e6c3d6efe82e7e4549dd2ba2. 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/TR0331501632.
The Harvest of Sorrow, Lied Op. 4, No. 5
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0660e0eeea8d3d72e12be2772c6085c696c2983d4736685e8c09610842ea6fcd. 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/TR0331501633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a89ae95800e75e68aa5f084b4270805aa131a3ef9d20310fa798cd0479f735. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/TR0331501637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498b5e1dfaead0349f77d8499a95424cfa228ba7ca5d5a0a05b8a7cb99ddb1ec. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/TR0282206505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d8f235df0dc8e59936f7c1f02fa36c04cb0bd07a6542d43191c83128121fae. 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/TR0282206527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4265f207f3e06b3001d137dfdd3c9c542d41d2592e694ff656fa1d422e22f5a. 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/TR0282206573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d8f235df0dc8e59936f7c1f02fa36c04cb0bd07a6542d43191c83128121fae. 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/TR0282206527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4265f207f3e06b3001d137dfdd3c9c542d41d2592e694ff656fa1d422e22f5a. 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/TR0282206573.