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 0x3aae7a4f6c9104647cb8cd21c5ee3cff0b69ca5a2e8119e7c08cba9a712057d9. 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/1b892efb-73a4-440b-8d61-86d2c25c1c18.json and https://artists.proofprofile.net/proofs/artist/1b892efb-73a4-440b-8d61-86d2c25c1c18.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 0x2a640a133ac162e2a2e71f786226f0c31ec4c2c346a4053c9a3cb5d3122e0f72. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZMZ92193581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4658314342e17a32329bb54f2b4093f3590730740a51c5c13329d876bc992936. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZGLM2208488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d9ca463eb0152e8c1c009b61be090ff6352aadd2a87a802b8b9e6bab072aea. 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/QZHZ32249615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d59f137f539cbe2de45fba5299a70a6929a696a32d862e0c26f75b77bda4c9. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZHZ52299936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x932a29c6d52782f6b4f1984ad66f6270d32648225eaef1a4fa1e78c8e5854941. 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/GBRKQ2236378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a53f0a38962e574a7e09717ba1e068ef45adb59ca3378a5cd8cac9acd138d7. 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/DGA062299336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b6f48967ca04d1ad449498e3c4f180d57dbee284a349a108f41d8e7f3d947f9. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/ES75E2307367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961b528f26be9dd4e4419097b2a0f4b53797720769000459f64ea9baaa9e9248. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZW9L2349088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2376ee0af910f6ad95db2e205b9b7c9917d92ec66c937356c8b19f09a89469. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/COAKK2400059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9006296a95fd5b109ac90e2605550846bbfbd6053b5be3b0348fc6e50f2696e5. 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/QZN882585713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c33ed5f61402c03cb02859cf57329fc746924dc31e2c41d386f25e00671677. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/COAKK2500044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c33ed5f61402c03cb02859cf57329fc746924dc31e2c41d386f25e00671677. 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/COAKK2500044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459053be88d89b64b9acac09136b23ab179715c748700c9b359c5001cb325da4. 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/COAKK2500043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7816831d54b455544f6b311fad53af66dead5e4e131080b2cde50e9ca0bc809. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/COAKK2500041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a1c41f550cf8f0e28f76bddaff440308fd9d989576a76819d0b618fc711fcbe. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/COAKK2500045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8747fbf7f39a69de6962af7a789d730e38c36676840bfddcb1aff6b6f3334371. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/COAKK2500042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553f8ee224765c5da4f12f125d2c5f32ced3bbe4d2ab12a1729de7894e0ac90e. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/ES75E2401598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5a2d0077c795fe7c7e8c9c6154f55ee14fba4d676ff1f5f2eb815b97ea2d7f. 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/COAKK2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23238cb19c456b8932893c3191b6db26721306ad14a159a72ce3a931fec7cf53. 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/COAKK2400044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1848e04d3f4f03e33ba5cb18d270cf701003008dbf26bf72d1183c78b8a8215a. 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/COAKK2400053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c5e2dafcafab6e9a211b47cf25c520c53bf1dd69257f1bc9c7687857097ed2d. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/COAKK2400067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a2c5c421feb89a71bd9d133b10fcdd5c84c51ddd2cb0529e45285e5d643c183. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:41:36Z), 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/GX53U2505204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd19ee0e5fdbb8a44714d5fef1d54729833bdfdc07096d9595da5277c0f6cb9c7. 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/COAF42491392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd941a02702503a8d14829e667cd518d64715f54365072f5e24d7624bc6d5c0c9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/COAF42392457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac48eee749d48988a89f679ce5979711fe4abd711b9528f5c2107da8777e0f88. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/COAF42292645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d1a3006e3f5150207a3f793debfa36570bb8552f49b6812389003809281680. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/COAF42495534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1c8eef974f171487ac695cebb74da7236270e87620700d95f938486a347c0f. 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/COAF42495849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea90dce6d09edf4e90c987a3f8f8989c6a31bb3938f7b1c3196926ffca459f9. 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/FRX452389322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde1c7ffc48c44b3d4e9d055797f27974522df9b3693dd1b67a31d496e539d349. 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/QZN882228738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a395000ace5dc8db4ce80f3a1de3886ab223bb3938afcff54f7f849b723e69b. 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/QZN882243716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade53b4dcf968ec0aad2fd628a00b16f00cdefd919609acaf987dfc851c31562. 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/COAF42495104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f12ca3b4020ed87decd844244abc19fd16e66d3270fef1a2f24215cef07568. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DGA0H2324943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416f23a44e91e4edc0ab284647e8d68fcabaf2256686b4a3f0117558cb670c2b. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/FRX452389330.
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 0x1a6de7e0a965542ad1fed255bf9aaf7fdb60171b0953ff2d1536f2148d199863. 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/QZW9L2310987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b09b780e9a5225e8919367d8412798cb934fdf1ff602607cd36e46b82f0551. 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/FR2X42402478.