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 0x1fb5f86678c92b1bbf8bff5104ab18f466671f5fcf4995a264528a1d5bf0015d. 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/b3f966ce-431c-4dde-b1a9-2b6f37a17872.json and https://artists.proofprofile.net/proofs/artist/b3f966ce-431c-4dde-b1a9-2b6f37a17872.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 0x2f847ff0f0acf666e70f468ebe051c950d2f1fd56888a3037e3a2b588b04e18a. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZQAY2430227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd6b87cf6e8d5d5ab4618a6c3ca19f27ad30c7387fb54ab5d531f1905ba62b6. 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/QZTLA2481820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e18e9a44c4367bdbb02a346770db033f3bcbdaa792aa7dc3ac74119ad4a00f. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/QZTLA2472539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c660c8d563885f3fedc937ef033dd101f59dd1a46382e1141499295711883d9. 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/QZTLA2442927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26eb912a9d619505d958183c3d41babc5dfe67549e2abdec387e95c59141ec7e. 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/QZTLA2445831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf23cdc9bb224ea7b092031eecf58ee7ce35fca3bdc2c01ba4d1e16c2f86b1f29. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/QZTLA2458804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432c0b832ec3d06cdc30acb2081229fe3be6d7b04b607d37eb17e23d9a6caf0a. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/DEUD42440638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1316ba6ffbaac4fa69c4ec7924cfbdb11382c7dc8d4724eedef502d6f1d9b6ff. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/DEUD42440741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3366d5eae0a42c224b8399f1ab23f0d1848845dd7dafc65f9c75e1fdd1f1ec. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/DEUD42441737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9018a60f2924304b5f10e5036cefb148cb987060d0f3a587efe04a7be2bdcb09. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/DEUD42442138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f0b126dc0596889ffce9dba2d9bc4a66e659e85207dfdc7040494b303262246. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEUD42442985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x178a5c9832986ae72cf4862543ef3ce747b60d9891dae5d211d1e8869a30eb44. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEUD42443634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23398bfceb84e109357c564f112d109ca56bb2fbd9a3e4f4f0b6d38e54cb177. 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/DEUD42446646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6617691742ecc5351bd470a8d615f8e8f6c8c118899a1c1fac2bdac1b213113. 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/DEUD42447216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5d74d7e62f7a9f25c5d98e0f7e43e1dd2fff77f36ae67695e509ddac91e8a5. 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/DEUD42448077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0f2809a3350b07540b4d0f39743294bb6c0e047b6dad64916106de6a8a1457. 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/DEUD42548650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8259d67729e556dc50e2f826e1445ca83ad4ee13c02b220a9da00d54714ff6c2. 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/DEUD42549438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aad6fa51d0b550943a034909670204bba8170cd57b4577b6eb32a2235cefe7a. 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/DEUD42550004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51dec85b8da3c70ae51e84cb2348607774e348546bfb2c0266fff81a3b0f27fa. 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/HUDHU2519891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad66430e890843e746d10cfb48557900147f5419bd86aefb66d304ce8065a19. 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/HUDHU2519921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a8da0da26251cac173e3ee212142bb74d4a0fbdb58e09e74f4654126a17efa. 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/HUDHU2519988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30408a1e1ef9aafee553771f6de0972aa7a08641b3e6e978b85180bc20c9df35. 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/HUDHU2520053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x157e270d1cae67c78c4ab360acc51298697794eb1c899faf071684934be0c849. 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/HUDHU2520072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b4f6ab844c030f8ca92df95d110da1c8408f06cc8679d87d974c470ed2279f. 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/HUDHU2520078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b6c5e38a6128f1741a17adba9247e34d84812f4abee21e2cbfa7b7db45d951. 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/HUDHU2520073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d3a8d66f39372610872fccc3473aac8aa9240d3300d8f278320cc7403ca8d4. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/HUDHU2520133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd3bbc25a997956ffedf672ba244ffc21932f57b4d63797ba09dabd6f7a14381. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/HUDHU2520139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e590600b0a7cf7ab43a18fb545e7b95522f3d69e468e84836c08c9278cf3f3c. 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/HUDHU2520140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e05d18dd0dbfab6ef2d703998cface4d80f6df891d08b9a24c46c0b0231ad8d. 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/HUDHU2520153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55d46a2e96a9c7f2b07779639e1fec0cf2b0a95b2feae3901bd2c01f257115c. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/HUDHU2520152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd349b0e34f1ed8164ea193fa698cdc882815ed350c5ed877aad7b3b8c9699aa4. 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/DEUD42555919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c0ca0e1fcddd0c24477e424ac0addd5a9abc58172eb6df5259128bc84f0d2ca. 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/DEUD42558552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5a295e4913ecfef8a09f865bfefb7548ebb289e4ed265e2967b50adbaff777. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/HUDHU2520363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74bf68fd8859b820bb2e1a40696b7d3c4112eb546b55640ad19a6817fb8f1da2. 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/HUDHU2520517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309e1bebffaa3c83c7d74974f55329de843dbcee89835c8b791b609f1bc23e44. 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/HUDHU2520717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb35a57b83d151b8ea9f0d6f99376da85bb7d9954cd26044208e17bd11b5a4e0. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEUD42567994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4016e5e7590bd58242a7765bb44fd3d88b045fcc083ec76e7fac2531f249d564. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZQGC2500412.