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 0x8bf4889f5ec5a9eb7d4a3550fc078c670be0344ffa1d945c247a8bab456f59a7. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8b8fa9ec-4504-442b-930e-1999fafc5a2d.json and https://artists.proofprofile.net/proofs/artist/8b8fa9ec-4504-442b-930e-1999fafc5a2d.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 0xbac0adb23ffebbf06df95e824e6c3f8192a0a89d03d5a73be15daad731f11852. 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/QZDA42318302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03f4b63ebae4ee8468f4bff851f87ead9ac7145afe1b2c72794281f86342701. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZDA42318303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01bd2f91ed908e17278fdd0ccc8ace12e494ad7aec8b8aedaf835062bce66f76. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZHN32501491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d80ab86f4f1a62a0ab6ba1bd24358c27fc492812c7ed0ad6f9926fc40c69ed2. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:08:11Z), 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/QZHN32501492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162e341ff32ad15f71f8ed8cc2728ca72b8a5e16b029cd4c4bd331e389420fc9. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZHN32501493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6526e745e4d57b16b7720d53216a179662f3f81010245c93f1f621f1bdc8e2e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZHN32501494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a54e1e7d217caf94377fb7ef7c6c0eecd42035b700a31c535f8b585691f5fa. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/QZHN32501495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6786eb2e6eaf39018f18eef3073e3b6cc13ddcb921d41bc33ed17f1f9d32a85. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:18:44Z), 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/QZHN32501496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5461de084b1672f19c2838d6130c4ea9c077eba453136479c28c533795bfeba. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:52:54Z), 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/QZHN32501497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772fb8521e7b3adef012eb84c68931606ca3b57da2ae492405ecad3b543d6516. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZHN32501498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c78dac0e01fd6bdce4b70be8a72e90b645de5b28db06044c1560e9d2b3b4876. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZHN32501499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde083149e9eba46b7734515d519ef62450e951466bbec5b724b891b73ec1401. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZHN32501500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3769817340beafeb98f7015c7eb19de00b3f1377814e74fb3b79bd594ab8c5b0. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:52:54Z), 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/QZHN32501501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d80f74b4ef43e44090e3361597438791b7adcdd5e2ef4f7620221d3e23fcd1. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZHN32501502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f3014894b13db8fb28999db3201a6ecc822a083dfd79b8e3e204224b56d17bd. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZHN32501503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04afc52e33ac93f89588f5f2d4ebc432e6dbf3767b65061ea20c87ae21b23da6. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZHN32501504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98eec1b061c929575a85d3b4b640512bc79ce5d78d124c7fad17a78da82e53b3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZHN32501505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f157e9e3ae4c11337cb8c80396ca9f86f565898b6c7664f7e55f4d1c3b8507e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZZ7N2584400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3cc49498cf3a7e7d8f061f3edfcead7f02c2e6b5d3e22c9c1595b5b99f17ed. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZZ7N2584401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ee839998e5dd896db66450a1fe13b93bef8eff51b45d26e5e9bc51cb74c824. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZZ7N2584402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15249e79763e6914c007d5519feda84ac14bb6680447ed0611379933f12bb53. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZZ7N2584403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cbaf1a8a9ff855dd82e87459ca15a1ff62e5e59d0159148331ddb6c5df12a17. 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/QZZ7N2584404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d0f7b27123dc3efe78dbb8b8db716e3a93e03d0f7229c0d109739b3c39c2a5. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZZ7N2584405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196b2b162bea3dbb1472c134160808a5ee5e63320093097a427e68653f25204c. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZZ7N2584406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02cc43ec8e53187f68915f4a4a7ea539d5795d2789a4252a3b9d821e90da3f5. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZZ7N2584407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc61931359c6cc1e11b0216a341e93ae1801611c2fa7654bdd4b494f370982e. 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/QZZ7N2584408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec83ca3ef653b916bc2c89fb589838b9938c0545a82d7f964b6663e9ff14524. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZZ7N2584409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc0e51830c3b1fb54111d8dc66c435a1ac3b0b0ed3f576a121dd43bf3b8b4e0. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:09:34Z), 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/QZZ7N2584410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea533c1c4f2e131b830d412f1c9a9911dc40043a680a686b00872e4bff682dc5. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:46:46Z), 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/QZZ7N2584411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794e2aaa89771c8d2630c93eb8da7a7b3746f210c1ba47445f347f8a235a8fd4. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:03:39Z), 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/QZZ7N2584412.