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 0x3a47680a80773e515e4ae8f4d3e1a1193f002854eda1e91e246e794c784e5eb7. 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/96c43959-be30-4607-97e2-ad9d5129f1ea.json and https://artists.proofprofile.net/proofs/artist/96c43959-be30-4607-97e2-ad9d5129f1ea.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 0x171481965d9851c983c9ceb528601f87fb8c9b9bfaacda2011e446308b348b08. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USDY41751001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5414dcc2cbed6f2ee24a8094e2d1da1afbbb7b2c5dd7f1dd84e4d0ba847fc8c5. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USDY41751002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3343d44b44aa9512e22a011cf95ad9b4a06a29551d1e52b8aa46ba0ad2de770f. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:56:58Z), 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/USDY41751005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb256671e522e0198035f5307e6dab888d2010c052945adc3e8f3ae9c287be909. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/CZAL11800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01f18f2bf14dda388e9777d5601b2536b5abb1e6107e036f642fcc4ab4893d4. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:45:12Z), 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/CZAL12100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc537a81698916ec6a4354a772f23db34aaab6e16ca879d9e6d800da339528775. 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/CZAL12200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f858b3f5057878d8fa0933d9c63935af543638aa89483251af653e31fd793a. Chain 2 (Bitcoin): anchored in block 957705 (2026-07-12T12:50:42Z), 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/CZAL12200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695ade20babcddf6aaaa7a74dc094c50fc76b45ca03492e38e77b7acc1e73436. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CZAL12200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af2b71365661830426dc14047a3b8a6933359754269b0fed49cea4b7be7fa73. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CZAL12200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177320617cb18cde953ab3a32c596567743fad4ec36391ae4db1d30a60fd73d7. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T03:59:01Z), 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/CZAL12200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e9ec735addb3c28b71a88696283770f148773fa2e09b3d20b07fea934a5ee0. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/CZAL11800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f471f2aca0d1bca7cf8184b1b98c0e186e40924609cb70a3eaa6db511641d7. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/CZAL12300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1673be9cf26953b223e252ef3c9dd573239939ee494aa50b15c225c6f6079b7. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/CZAL12400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7633eb3954b49d80156d2136fa26c5403190e6ecb266cbcf31c780d1c19e75cc. 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/CZAL12500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e8b9cf15d11eebd35296286f8e1f0e8d49a5f5facd8b7514456aefd02897b4. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CZAL12500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab441197173b1a535492ce89bfe52585820399be9e4f2779a0e8c98ef0e6159d. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/CZAL12500009.