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 0xe5b79bbddd7e95ef46e7cd5a8d1990f1f41336667b725a89bb6b6ceb4c1d3232. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7e635567-7120-4bec-bb90-9e343c346aaf.json and https://artists.proofprofile.net/proofs/artist/7e635567-7120-4bec-bb90-9e343c346aaf.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 0xe2d81c423949c12656fa340718d24bb9f7f4cecf04258a0e13caffe1fcbb5d79. 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/DEZ901800465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc0b3bc8bbc1559ab5ddaea942f7769b047d90af71e659ca9a93df47e87e539. 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/DEZ901800466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc20bd5d06b25bbd09ab250bc91a854a8f70f027a0dca53ae7d7183716c65fb09. Chain 2 (Bitcoin): anchored in block 957304 (2026-07-09T12:19:34Z), 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/DEZ901800467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961f92d4daf9bc37b2d630ef1eea88b0ed5d487f6abaa41c63366721acc9c3e9. 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/DEZ901800469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf49ada6f1c794ef5b8d0384b0102772e62360877c0a03a274ad07f73efa73d. 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/DEZ901800470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac69dce44ed805fd5449209f594ca9198f0469fbe92a48f45cebc3fe12942f5e. 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/DEZ901800471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa3292715c0f9b4004eed100f9535df593edc8644b6c8934318ef064d17abfe0. 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/DEZ901800472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfafff56e60a286d864f52b206d3421b771871587a9e04ac6d16f2fadb6e047ff. 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/DEZ901800473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173d0ccab07fdc143733a127aa30ed953de4168aadbfc9414f5b24fb87a707a1. 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/DEZ901800474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d81c423949c12656fa340718d24bb9f7f4cecf04258a0e13caffe1fcbb5d79. 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/DEZ901800465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc0b3bc8bbc1559ab5ddaea942f7769b047d90af71e659ca9a93df47e87e539. 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/DEZ901800466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc20bd5d06b25bbd09ab250bc91a854a8f70f027a0dca53ae7d7183716c65fb09. 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/DEZ901800467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92fa2d098c1bf2a44bb1625371d41e33eb676483ee5a1c17d0e4170bae3788bb. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEZ901800468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961f92d4daf9bc37b2d630ef1eea88b0ed5d487f6abaa41c63366721acc9c3e9. 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/DEZ901800469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf49ada6f1c794ef5b8d0384b0102772e62360877c0a03a274ad07f73efa73d. 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/DEZ901800470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac69dce44ed805fd5449209f594ca9198f0469fbe92a48f45cebc3fe12942f5e. 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/DEZ901800471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa3292715c0f9b4004eed100f9535df593edc8644b6c8934318ef064d17abfe0. 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/DEZ901800472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfafff56e60a286d864f52b206d3421b771871587a9e04ac6d16f2fadb6e047ff. 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/DEZ901800473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173d0ccab07fdc143733a127aa30ed953de4168aadbfc9414f5b24fb87a707a1. 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/DEZ901800474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e106352cf1e8843b51d088ac1579682a13454c07fcbcb2c7b496389d94f7d3. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEZ901800475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6ac22a9e8a948f2266fc3b515d5bec9c865103251ff2aee9c25c13a3934752. 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/ITO371502752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d02903c22fb738bfa6ce8c94070a36861acfa761a2f796f668b2bed98699aa. 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/ITO371502753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ed1983b9fe043d60b1b921ad911c275d4072b03f88a2779000879435089873. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ITO371502754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc7e055eb1e418cb8e9995abf7d98762cc62887220635ffa7ba898093368e02. 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/ITO371502756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dcdb932011cd4dcef50043f6eb083d1417dc94db6978eaccf38e844f51412e8. 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/ITO371502759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5371db030834ec2b6f7c23049fdd1c4e8af0e8a00129552b88f4fb7380ac38b1. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/ITO371502755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679c1c06a60be427c75368490aa60bcd03bb93e393da546ca97b621e9548c1c2. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:10:09Z), 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/ITO371502761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a78c4d176c2b06bfe01b56caa78b0efc7b9f9dcba5f82c31c664149a22ca623. 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/NOCYM1408030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0593057d6c962f56bce43ec783a2746e24f9a511541bec9ae39c374bd43a9f33. Chain 2 (Bitcoin): anchored in block 957249 (2026-07-09T02:31:37Z), 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/NOCYM1408050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf94eb163d7e72ce5a6750caba5805e6a88c226a24b0d78d81f6ee3b1ee5c957a. 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/NOCYM1408080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7af5fca3d909fe95308005aa8b7282d77bac42e4e53ad6192852e693a885a6. 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/NOCYM1408090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8975fdf50ca7db9171e8e58fcf6f63935c94b70ef17773610764a422ad33d4a2. 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/NOCYM1408100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3ed5e09a23f5be8f6f90e3ce83098b4539590371ad66ea02b47f7e37f998a3. 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/NOCYM1507060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x192c7a26edd905c52273ff39aef57b76bb00fd614d8d76eaeb32e4f10e444986. 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/NOCYM1507070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1935b26cbeaa9c289e2f4047ce494c0340308df723043f96e237c5a689e64df7. 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/NOCYM1507090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a0a8cd1dd3a913e62e974fe0dc37033bb73907f4b913bcecde4279cc98e4fe. 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/NOCYM1507110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf62b59318b877007d481b38de8c3a3855592255378836b5dc8dab1989d4ddc61. 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/NOCYM1502020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e4498fde722901b9730d05b516d3f7bef147482b6c8a38d2cacd0de815c517. 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/NOCYM1502040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a07ef094cd020701d473b4c225f89c520d3c83c0170d143f38d6daeae3ccc7. 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/NOCYM1502050.