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 0x9e8a7f5d9907ca55a3d70cdbe38a6e0266fca64477452829f3f35879c1525997. 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/c294e06d-b1cb-447b-b20e-d10f47ebca54.json and https://artists.proofprofile.net/proofs/artist/c294e06d-b1cb-447b-b20e-d10f47ebca54.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 0xcd5f288ccf09d2763d928b98fb296749011b83b36715a3a1eebcddc2b1fc1ba0. 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/CH7812196525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcbfe6a6b79bec38b7d722a645b2c21ec7329f34d77c5dd973b87afece26f833. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/CH7812102724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac2429beb289c888670e2b8d672bd101b2dab5d52d6e228909d43ee43d6191b. 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/CH7812102725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237f0e0356dab0a6ec718b5b4c7be6788e62f6d0104b50a586e9a28077cf7f3f. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/CH7812195193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd5f288ccf09d2763d928b98fb296749011b83b36715a3a1eebcddc2b1fc1ba0. 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/CH7812196525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d4c2d3dedbe77df28555f0a6f3e8d4652ddbc6c1999f366bb473384d3200c7. 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/CH7812102726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe814453f7fc776a51ac74fa995ddd5718efffc02f7c85d8e67f17a36d29fe11. 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/CH7812102593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb5865bcb8b23d7a2a35e94e00a7a9c5ff8d870da00c1465e5c34a1aaffa911. 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/CH7812198813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x911e56680ff7b4c7ce4f025070156216aab39f014913abb2e06a0ba7f35494be. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/CH7812360956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa13477dab93d5a88a62be3dba81fbef84a98d73a71326f6b7a79ea872ac493ac. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/SE6HN2345512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca4cfa631271036dc252280fc0f48f8b9376828cfc695de6bc513069dc41c94e. 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/CH7812229000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4b3dd07f33766dab177aaf308d0a05d3eec0976c44be0a3047927ed91c143d. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/CH7812223033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9394aed9a9f526de791f3640a6741792faddf2efe9984979cc52f19e2319fc6b. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/CH7812219706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaca9b5b85fabeb649d40d7e8235505e6cbc2560f86aac7b010086b3e46f2fb6. 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/CH7812216927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb958e5dd53f60dec319a399f70dcbe022fce2fe7f11a60ed9dea742fe6aadb2. 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/CH7812213258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe814453f7fc776a51ac74fa995ddd5718efffc02f7c85d8e67f17a36d29fe11. 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/CH7812102593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb5865bcb8b23d7a2a35e94e00a7a9c5ff8d870da00c1465e5c34a1aaffa911. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/CH7812198813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237f0e0356dab0a6ec718b5b4c7be6788e62f6d0104b50a586e9a28077cf7f3f. 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/CH7812195193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2be5a6965183abe8e28e7e24209bff05f5184eabb6c00fe9b704e606f71a89. 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/TCAFK2186335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b2ace12f2843e7ae0899e4442bcfaeaeaf0d36c44984b650a0ec22243ac3ef3. 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/TCAGQ2281526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c5d4fb63bd37ddfc5a86b0fd9e2a7e0c0bfa47a0582625b0dedb1aab28a64fa. 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/TCAGC2223807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08804af3259ae3fef44ff81d7575b650ca8064f162ee3a104bc9d1a00c9286a. 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/TCAGQ2281621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f72cd9087f6e2a508b341714805c62e344079419823e26863950f09dec4c6a3. 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/TCAGQ2281626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2362a5e99125c31187d1f46e42c5bfbded01c1de3d474c4a42ce2c5c343fe593. 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/TCAGQ2281632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44d55e5cf09281f67280c451fb32ad15bec40bd7baee4b5158804d38d4f6982. 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/TCAGQ2281639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc680fe6e0e43e126161cbe36449bfc6d4c9bf395131c9a762eb117a3add23512. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/TCAGQ2281653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f1c3e14c40996c50185b202f71163e15450996050085484527475184518693. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CH7812180918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01089370e72ad9add5524aa2ac5bc3a22023c505d68b4d019504600df32f8076. 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/CH7812180919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc08d1ceaf0e0101ccd860d4e7ee46ef340d9ebb7941791827ad12fc41991cc63. 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/CH7812180920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a84b3328c9bbc47a7554786ecb42740e36d4dcc971f42f590810432e2083c7. 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/CH7812180921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x583f2b3314522b01a23c73abfcf8d35ab16e44d13749525f4382cf9225633053. 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/CH7812180922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616b1106cc28428938b2f32b96f2484acb069f4e012cbd917af1db1385dbe9b5. 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/CH7812180923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3208120b73a612c27b6fbdb4f5f96c57db7adac207e9acd4d69764c89de8d66e. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/CH7812194747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95893f6a35733da268bac8c542322155f96fa376ab342becfdeb0ce20131ec19. 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/CH7812213616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eee201f216d03b370bc9b6de01212785aee623c187ec29b692980260f815542. 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/CH7812102588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb958e5dd53f60dec319a399f70dcbe022fce2fe7f11a60ed9dea742fe6aadb2. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/CH7812213258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0968d1faebc8b408d8768ccbf89b88b51132d5ab23a510a1bafd498b4ea2e0. 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/CH7812213617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8eaa2ee95308fcf1425541841829a0e9ba9cb744293c8c0184ee29bc35854a. 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/CH7812213618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b26ba2764b8ac8e0a073b197d7fa33a7b15d37bb0fac042811c9a1126da0672. 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/CH7812108849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96150c91e6bac9643ce349240ca6852682a8fce4e7b81f45cf5e88a2dc67c08. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/CH7812213619.