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 0xff35a10b16cb48971cb00572be311ddc30d1891c7f5b939aa6840848db3b6694. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b5e90247-0f55-47af-80f5-0bd381326191.json and https://artists.proofprofile.net/proofs/artist/b5e90247-0f55-47af-80f5-0bd381326191.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 0x84c89fcc640e9d50436f678527e35257d17a4531061010db2722f640b4a6dc14. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/DEHY11400548.
Guitar Sonata, Op. 15: I. Allegro Spiritoso - Recorded On a Hauser I Guitar 1916
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4feef292ec3db163c88180e45b7e2e40aca4a4546c217edd1f600d5f69f26948. 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/DEHY11600687.
Guitar Sonata, Op. 15: III. Allegro Vivace - Recorded On a Hauser I Guitar 1916
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe903df01b74c1911f97e3831a57c5264d913b7f393cd752db9006ecf806c64fd. 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/DEHY11600689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd9bd1eb6c859dffa2fe1a67e285715e1a8d99c498de4240c070edad372b9b1. 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/DEHY11600690.
Dreams of a Russian Summer - Dedicated to Tatyana Ryzhkova
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6b82e3af6a323920ee51f978453c22414582aa85783d2dc1a55fae75303567. 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/DEHY11600692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e053724d5ffc4506d413eb62fc9b45277097e2a22c0c0d04ce0a6f5bf70cd5b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEHY11600693.
Prelude, Fugue and Allegro, BWV 998: Prelude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60262a243506f2921e403d326e6e364528022ec1af66c4fe9fa32c1337cbff50. 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/DEHY11600695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c695e4a11faf9258436080e666576fa386f6bc660d5d43a3298180676c3a090. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEHY11600696.
Violin Sonata No.2 in a Minor, BWV 1003: II. Fuga
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ffd3cb3f0cbdd7dbc2c973491ae05562867aa659a95612d56d8c258bb800936. 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/DEHY11600685.
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 0xf309c64ad715ee8b02f8af3f372b5a9c70d8aa1abdae8a9c645aa6df5c379472. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DEHY11600686.
Guitar Sonata, Op. 15: II. Adagio Con Grand Espressione - Recorded On a Hauser I Guitar 1916
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a84eec37d05ba54beb395a7ae85bbd2d93ff8ee352f7ba645c45c2c74a45bc. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DEHY11600688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc95249bceacd90830f80022bde1fbb74dc6065f2c7670854ab8f24d0374ef02f. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/DEHY11600691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a31bcb4829554dfdd5987ec7757ff734777a4a598e100e8bcaaa68f839bd0e1. 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/DEHY11600694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02808fe513045442e76c226c22e284df068925dcac2f1f4e00e0b42500b1ce80. 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/DEHY11700992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd8998772ce1791fb4a7d8922a7f1082a953374132acc5ec8d29fb0f808fe0f. 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/DEHY11700994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a17bc6b3ab58c693d312ace640780e4adacb43686b76a8ae4b3d367bcfd77a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEHY11700995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886f732a45753a24bc5c41195a5b23da7cc8f613edc312b5b279f162c195fb52. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/DEHY11700996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e15c8767e9825d2df304e92873c80b0da6b1f205829c845e967a3abbd4f78d. 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/DEHY11700997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d0d843ee66decde3e7cc5730c770a203af0b0af725f390faccbcffb7d5aea4. 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/DEHY11700998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b1bfed515d5ffb2c78c18f9d4e248d52668dc9c0fa880efa36874b44e32ee2. 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/DEHY11701000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaedc5c2c0113b6c9844323a14c95902d1004507147e7c1f9e921b7016649a642. 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/DEHY11701001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a0ebcd5d02ff897628f827fe505b30cd04867a5069e591f5447c1e90d1e7a5. 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/DEHY11700991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87cb03f0b96091d05758e3d5377d6ec6c7ca5563db715a809a6ea529d16154ed. 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/DEHY11700993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae454f39791d874776792abc813cd51e616cf8cb812f370493a6a81d1e0033e. 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/DEHY11700999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43407c10e1e9c565523a4a437c6fd8e2358cbfa36e73554ca7a48e586b156f8. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/DEHY11701002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8dfc808c2fc382ec95da638b97cdedc756b31ee8905c81e876f3dad76688858. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/ATA101249280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d5788514cc6acb7605f977fd5e763e2440d8a3583c5258ee70b197503d34c5. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/ATA101249340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa4f68ff28375ee489243ccf7a0a6a2b719e0fb457993baa0219debbafa9a768. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ATA101249350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e98644c382bcf312e125b30cec1b124f91a790f0c65496f3c247659b2285cb. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/ATA101249360.