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 0xf7e4caf9ec729310de2ad6413f369315562ed0dd9db1d9a84f8629d62421cd60. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b432c526-97f5-4270-ac66-7b60f0f15640.json and https://artists.proofprofile.net/proofs/artist/b432c526-97f5-4270-ac66-7b60f0f15640.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 0x694466eba6d2501bbe29a36fc4dc2848e8cabb6dd95456dbe43cc0757fb18e09. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/QM24S1801867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694466eba6d2501bbe29a36fc4dc2848e8cabb6dd95456dbe43cc0757fb18e09. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QM24S1801867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9430987760880ab964456fe9c854174c92fa7617de04ffd86fc6ad183b28051b. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QM24S1821592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfcd83cb858c66c9d709403b036e3034d2ff3efab742987c328b642f70ca8df8. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QM24S1816010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27fcc10ff053cb268859d2ecc541757caec3ee261d4d5cf8bccfd68c6e5a96a. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QM24S1821594.
I Better Find Your Love / Don't Sleep Without Me
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82dcd2d657005f3ff87970666838113a34b6387e2fcc579f7636af7e6cf9f154. 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/USUM71908775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd14f00fad5218e22b099cc3ff2c8a5c371270c9e39b353dbf58543f41a9c91. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/USUM71904910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e1fa717f3d380fd46720b0c10a9149ddc7bd6ca60edbfd7a2d89e83eb69103. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QM24S2004030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dce3d24e69c1fc22569caf3d49453007a9cae28fc6c138cb445e8b0c2ac9ddf. 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/QMFME2108256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8b375ee746ab92299def18aae6d6aa2f7c5c447db66a96b3c39e9c8dca37b6. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QMFME2108259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc2a91a58f4fc49977b8fe5be1830c3c94d42811d9726b95a78359303e44feb. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZQAY2363613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7295c4bc9c840001d57881c919639c4a6c0aedb0dbb67d3695431e783113d1c9. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:45:02Z), 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/QZS7J2392772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe3dd07aaf2d3ed490a0dc8d3f2a1489d737d92c77d203227c4cd133bd87d66. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZS7J2321818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc874dacc243b473808ca3c086f81cbcbe46b65b7f8d8a18c3be5ad3bfefbc6ca. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZTLA2545270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0827c808c00f8157d33582d9d54c727bb47e23ff8a2378437e1de58252d90a. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZQAY2581389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338102b1a4a63cd433707ca05754a1cdb9ac4fd324fe4811c6771e63f8504305. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZTLA2527647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b2b25eaee7e177a9aa11a9ecfbd63f7cdd3d46e423a708602480a2c25b5e86. 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/QZQAY2506121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4988a810840e79c9d2ef8ba5c6345007396cab3750865c9c69bf9319a8cf623d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZS7J2532344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21506e904da8b40c4f3c1a722dcc4b06e3de2375158ad65482c5981e0af415a9. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZS7J2549901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ddd6fe0680762574413386aba6412eae1eacaa417962cd933b127f120277b6b. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZS7J2566958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59602e1a0b5debff86c8a88fecaade59361b1219b708adde634f0bbecc1d77b5. 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/USAT22101468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237e8e21fda76c8d98ca53d47649599961759adf6f1e2a7ad19268ab74597a8c. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZRP52366998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237e8e21fda76c8d98ca53d47649599961759adf6f1e2a7ad19268ab74597a8c. 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/QZRP52366998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc50cdc55ef559dc6865fa6fe0d1ba5be227c2d8c6279dde1e98e146cb1882d. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QM24S2107613.
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 0x6dd3666db3b7cd09d402af32d15838d3530feaa94ffe1c1e94d5f6919d5274df. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZTB92363914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf56aaecf3e562208329c106ff776d2a18ae4d533f81213847dbea26b7afece5a. 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/USUM71904679.