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 0x53dad034e8e95a625dabcfa48165b148398e3970bd0c5359e13eeffb878659d5. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b2679875-1644-465f-bb4e-401e031c890e.json and https://artists.proofprofile.net/proofs/artist/b2679875-1644-465f-bb4e-401e031c890e.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 0xf0ab5c8164a81a9dfe23b51ecd55d19062685041f7b2b97199495237899f1928. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/SE5752286103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a8cf300678cfca6ab670dd5c135446c38fd1624ffa0c3ba1946ca889588c246. 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/SE5752286113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2138581b041aff89e1ed9d0e78038963697caed916e4ade4a4f7200c07fe8a7b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE5752286111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9afc0ede90f1d35ff7390051264a154836ee1d022ebce9fc39b0522aa9cb15d. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T19:17:09Z), 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/SE6QE2216539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f664e92b054388a7d96919e0548f500f4e54cb5ffe64ff8ee2d18d08b071ca. 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/SE6QE2216540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb892696acba3c423d864077b3e7a28e89915293578d21439313a6506b1d20a. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/SE6QE2216542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dcb729548c316c8a37e1a56f44260e453dab335e9c2fc2b2b51426017e246fd. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/SE6SA2287510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a28f185b7944020f3f5c8221f996b452408045695bc6658f8dcf599d4da283d. 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/SE6SA2287490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e727ced3967db586c855f1b4b796ed96d5fac312ba5f7b244de25e3aaefa65. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE6SA2287499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4241ae77851f0ddfa279d6c40cb9282039058a5dd15e8f08c778d44f019f7695. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/SE6HN2332879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c4ed0cf7007951e189a85f87f383e180522c6d6ec2ea3b1d783165488fab1e2. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:51:11Z), 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/SE6TI2324646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f800bd3c225fddea58352f214863f5597d4787b92561c9cd270d57e4f2791e1. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/SE6HN2456241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b6f4b2e56ca4ae4d82e429f0f0d08e3fa300944f7e2b2f285ca73f2f40099e. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:52:14Z), 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/SE6HN2456242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bfb651650433144918a75a78da2ec6cd0b63b423785510210f4f881ff49cf8f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/SE6XX2586143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7464dea5ad88c2840fdcce4e6ab67a7768faece209580660c3a5b1b34120f9b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/SE6XW2100587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68242f7a6b61e5b64a6d42039eb58f1eba6211546834a6697de09feffe5e907a. 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/SE6XW2529769.