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 0xc89aebe3d709e0fa8d85a9846f077506639ee9b4d7080f2060ac80e0839df244. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/13b74bf4-a703-4c98-8971-2ba17f09dbcc.json and https://artists.proofprofile.net/proofs/artist/13b74bf4-a703-4c98-8971-2ba17f09dbcc.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 0xd4b9bdba67d2870cd8bbf99c0a2e139b32363db43e2cf5bc2b20baf7848f80f7. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:05:34Z), 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/QM4TW2218441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ee8ec83a0f2d61e00f56acaed4a3414974921254d37ba31bcf60921c8f5922. 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/QM6MZ2216495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x927225a7ebf733f12fb5077e6c5eb36736fe1e1d98f5d143d730d2c7b84c927f. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:57:03Z), 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/QM6MZ2269274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc208d99440f8e59218e04744af8b3a6c38485f21e697ed4f659827eb89c626f7. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QMBZ92283634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71bdcfc3bd625f7cb5517d21fb7a4011fc373e07da3fc1bd7ff58ad1997d609. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QM4TW2323199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78063f3ca7a64e5ddbdba80130439fc0733df9f2913575c90beda02d3d7f56c. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:22:30Z), 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/QM4TW2345240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf5116bf8a800c7a38c7f84db5a6280755cc07d52e32b40a274689200be654d. 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/QM4TX2333137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ffc7c1aa1f4b48423389bf7a1d4c40487aae10d7391ed65ed447af7305e5d85. 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/QM6P42301039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e2bc53fcfaafa94af29619f29bf43b0462d95419805574481482c91af4aa382. 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/QMDA72365810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x209aa314d78633d42813a7959758ba640a710ef968ca77946b2c6acbd437a83c. 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/QMFMG2312383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7b4425b4c59f4704fc0c4c95d0b042fd578e91b1449e2f3a2d7d680bc65730. 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/QMFMG2322601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9435de53cea45715a1c05569c0a70b6d596489bf0c325f2d03910d35a58e5a62. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QM4TW2402540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df054349c580a72c14bbdb4eaa2b9bce1040bae93c5cd297ad6fd895b20ce92. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QM4TW2456905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0a1c0deff22012f4da2fcad8ae2c4ba841d30a39229e3be8c20d9d11220962. 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/QM6MZ2422647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x165125632f9b67ca0016e8de7787b48ceb882d52e807cf395602399013f59ef0. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QMBZ92483026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6eb2e8d455ad177f6ce606f6cfc9365f4d37cff5ee85b967ce282c25bf68795. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QMBZ92485406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf311828a65d6aa5ec0ad57108ea73098ba29728e92447e56ae4144ac7ea96d28. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/GXBNP2478881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d0b529fc1c9cebd68fb3734367a6b148d64d5af0105b86ef054c570024364d1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QMDA72558286.