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 0x399e4fe1a04ed4e4ec0e1d39e7651140ddaf4f86f87cf4f5b421f29370b6f915. 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/c8124edc-9cbe-4a4a-b94c-ba09c9124ee1.json and https://artists.proofprofile.net/proofs/artist/c8124edc-9cbe-4a4a-b94c-ba09c9124ee1.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 0x35886e52277e168442bd7919de6595a9b3838f327bfd71586a14497b68575d3c. 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/GX53U2091563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83c786c944bbf1817da21a804255fa9eee832bd159eca4f1ab3129e8bf248d7. 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/GBMA22467321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c7c78dca0f599301026a7f3d34f9db2725be15e62f914819a434d966467095. 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/ZA56E2416300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4a70f8a2db230c6afb23782dd28eaf45963dd214c800b697eac11703a02c93. 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/UKXN22453741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x269a1a5ff3637c05b09fc9b60468bd4c3267cdc31bd0fc548fd2d538742cc38b. 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/UKXN22360953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b7588ba13a06a74fe57e2d287908aafedb657c949d6855e3149d267341dcfa. 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/GBLFP2424634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b181cd194e24b2b7ac9abe293d5ecac8525dd8ffcb986b954697479b5b19d0b. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/GX3Q92414741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b7588ba13a06a74fe57e2d287908aafedb657c949d6855e3149d267341dcfa. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:10:23Z), 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/GBLFP2424634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220a2bcf271e2203da96947f1b9c387555415fee0c22da1914e3582d5991eaf2. 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/QZTVM2353937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0806703445151f329ec9f1cb12fa04973848384d0252005043537903c19179b. 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/QZDA72008348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72e6b6912839cd7bef61918120e4a04f25ee2d016a691dd9bd6cf5ec8e18bbf. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-21T18:34:00Z), 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/QZDA62160226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a482710c57b876c47da113e320a3c9b3af6a257dcf380cbbc8fc02c96dbfdd. 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/QZRP52193931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f61cbb6fd0e7533da30e188df02d0b73100bbc6de419cff4607fe7b0a72e096. 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/QZK6N2249478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13bd32ad9e4419fc3cfd67fe10001cbe8f8d6a92ba632cfc6b7ac01623d74ef. 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/QZK6L2088070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad4f8f19151583a23d7a538cde16763db7c00c45e7cc11cd565c22cec461ec1. 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/ZA56E2416299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14adae83b08a1291fd80680898286a28dba32de6d9e100a6958a9b4f52adefa9. 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/ZA56E2416301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d5fae9bf738966d463002f6968f921c477a5ca368adedc18e4271ce8e60631. 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/ZA56E2416302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b8640b381435d7b0607e88e23d2da9a5b536a1d139805edc007d3391fadac0. 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/QZ2GW2200237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652df675866a9e48f58997b1e79eaca90b54102275b0fc88776b6c85e8b339b6. 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/QZHN62167858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed6345000b40c2decb1477ca73cdb7669c88f694091cda658915deb14eb9659. 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/QZ2GW2200234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb89ffc923a854756c71d5e84ed8f030343a97b5e111b70359510159730a2a09. 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/QZHN62167860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f7b6f6a538dcb12ba07cd532532badc911930cc4006bc67791343d2b8f78a6. 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/QZ2GW2200235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x190e1ab47afbbbfa694f3f18ca3beec473cdc4291cbdb6bd5496a12931b0942f. 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/QZHN62167862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b809deb17efe16b6a6d86a500df2ffe8c838f6d93f9f5cfacf0b32e3d153a9a. 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/QZ2GW2200236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72e6b6912839cd7bef61918120e4a04f25ee2d016a691dd9bd6cf5ec8e18bbf. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZDA62160226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90bf806e1f764e2ecdf9f30a08f425073e2b04eab2370c59a0c9db3118ae07ed. 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/QZHN52032146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c182e6f014557b39eaf91d1032eee7ad28f128f557bcd14489c190006cce6b. 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/QZHN62336381.