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 0x0543a54f212344be002beaa630f9a9adb746754a4a3faf9294ea160389126e42. 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/d35d3d3a-9077-4468-985f-7f2668f37f1e.json and https://artists.proofprofile.net/proofs/artist/d35d3d3a-9077-4468-985f-7f2668f37f1e.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 0xd4e3c8a17e55564986e4dd3bb88723b8d8f8caf0aad7f2b6338a9a407138fc1d. 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/QM4TW2165636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6abb91d76b155a863a21430a54abf3104b47789b76d428107f732d3a43aa7ffc. 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/SMRUS0064465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e4367e64d724c4dc4da43a248da41c3942afdc86e494d0c42e1cbba39a5399. 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/SMRUS0064470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4bd5141ace6a5b0e9f426188f044c744ba99ef95da40843a7dba4e76feb0ca0. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/SMRUS0064462.
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 0x994c192485c65ced4d16da8ca4e590b25fe4d7b0ccfce36b83a1f12156c80bb2. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/SMRUS0064463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf529467842f2d7e98116988c29bacff14bb212e8250954681de6c032d651cb. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/SMRUS0064464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8713edefbcc4169d77c6c2ea991330edc5559dc53923f5f86f4a824f7ec78e6. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/SMRUS0064466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ca7c86783eaa690d92cc947e8189347913db8dd5037ec6c5b94a6e46dc4396. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/SMRUS0064467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200b1b8fa1a2dc894c661fae8a31607ed46de2ef834850814b72e83e34c9f776. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/SMRUS0064468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33752609326f34aef1f5ac48ef36cc2a3353f3d90ddbba20ed451053735728fa. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/SMRUS0064469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc0ceda6bb4b33f96ba604f18805216f8c4d22d1697e5ed1046b3b2134b586f. 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/SMRUS0076702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da64e5297b7222881a42fb7cc514f96ef9257909e0f5adc6c92a657f85f52fe. 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/SMRUS0076601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6666f0bf2f2fc4ad53b1c290204bc142df20c1804d49cd4030c451be1161b7a2. 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/SMRUS0076472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab6425bdc7086de60c2942462dbaa8c0216023b84338173362e0f497b349cb8. 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/RUAGT2317924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41ef79764f2fe0f134c67fb8e7eb8c748527fa8a2863e87965042e33ef0d0ea. 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/RUA1D2372987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44f3540a371a6d0358904aebdaf0f3c21aaf08add7d8e7c569d45db8b73bd76. 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/RUA1D2338626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a134f67fb0f8b15508c478dc6418f84f38187e8a8d926f577099a552457fb2. 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/SMRUS0074403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4bcb3c94ebbaa212dacc58acc0ca6247029857b621d92477a8c26a30ca7a7a0. 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/RUAGT2211242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd3a25f489d45212d81fcddd1bd8fb029732be5149e7f89b51d5584176d2b248. 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/RUA1D2281684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe5e77a0b6e9dfe681eb72bb72bceb4568767f7ab51185840ba506fc3d0b05b. 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/RUA1D2246515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c959da9a29e620c37d49d10c11a8994dacb6679cf7487c869324a8b9f40fbd. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/SMRUS0071983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41dfed97ebf1c04ae0de2e66a81c3a6d667dbec86b2dc2fe2b6184096f8a681. 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/SMRUS0071527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ade820240181dffb39cddc4aca9fdf9cd27fce0bf19d41ca871e8aef0a76674. 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/SMRUS0071227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f87cda4b7f2a14d5bc4ad823f6b1e7b9c11087a9cab9e768a55622fc4f66be. 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/SMRUS0071131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ef0930d737cc335c4396e617fffa0d046a498dafa9c2357d501050f99e8953. 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/SMRUS0070855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x821f911219627aa4781c1242fcd1c3de7b37a409fe31fb06231da06a2414ed67. 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/SMRUS0070673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc915006addc021df815841d2566d52561354e8b218f40c39b5371e7bc8b26753. 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/SMRUS0069080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b0cff44dbeef8408f1b74a05d786eea042dd6d7503aba424e25ade2cef76f8a. 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/SMRUS0067736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b276b80090004de4199fbc0f091ba1684c1b8bcb4eef76e1183b68902c9071. 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/SMRUS0066024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63a08e386f43515ba38942070a294eedd7b5b0bf3e8370b967cb140732171686. 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/SMRUS0065288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531c5cdec82b037118dcd82c42333008692ce632e82fd568491a66596dfa3373. 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/SMRUS0065055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef047cba5d93486a545671ea53bb5cdb54e9176b61794dce48efb6f8c0a3f308. 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/SMRUS0063879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c15a47e7f5850540ccb0567a0affa2356ffe5a86ad45dd3cd9ce7a405cc8e25. 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/SMRUS0063540.