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 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 0x5ad5d1b7219282973b2e8d52d4e4f80232a45b2ddceba80c3714086a95a1dfac. 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/967fb095-327d-428b-9dee-70594f0d9847.json and https://artists.proofprofile.net/proofs/artist/967fb095-327d-428b-9dee-70594f0d9847.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 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 0xe01e7958560a8c29f4cd3813e257a175876576c050e0181ff73159f8441fd873. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/US25T0528026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855ade1d2b036a82d520c05a5d977c37911830dbee2980b24e02c7e6f61a2b5f. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/US25T0528027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7147117920fb4952ea35b83526588c1d3f89698a22910f06446ca76185f072c1. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/US25T0528028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ff3158a834e12fe71f84bf5b3d5c98045ec6c3045defb59d578570f25153fe. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/US25T0528029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08e385a06952a42f7b89b4a54901b8367a2b687b1b49f7654f685508cafaaba. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/US25T0528030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ea3f9354bce6d83506b6c38da7f5a6867cbefc46c07d014321a8c4f54cee885. 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/US25T0528031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c8ff7554458e854a46c6011f9e867a0312af4c4ce0132931978e5e79b5abd9. 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/US3250317101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c280a56588a4ba0398d34fb6e6814bbc10b7bd00e9db69707b7e421ba11d75. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/US25T0527986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc52e4a03ae05816d4d7c3782a3140fc7c4ed5b3005b881c4d40d1a48c4a7b88. 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/US25T0527987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc9988674ae433632a76468b29fefa2f89fc53b1a9daf525e5a1c1ddf7a3cd7. 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/US25T0527988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e82726162db810523b9da919ac581ae904fd94bf01604c3962e64acca10f90f. 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/US25T0527990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835040475cb8ae43f0671399bd6b3bd66214a91c8336a14291cd86bbd4958afe. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/US25T0527991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7c63842f04f15bd79db834faf7b7865ad17a4d2fc21352e7db1902a978c68b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/US6JR0982002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81b09705e3263bcf3d23da22ebdde4cc66258c7ac0cbdbf59d6c914fa9cb462. 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/US6JR0982003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda7359563fcc7a8e7885b74fa23be6adf5f7a2393a52a8ac02dc0c8b255cb39e. 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/US3250728102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81ae76b9143924ddb869a48f45ecc592028178e100784771365bb6141989438. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/US6JR0982006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44387b8830df10a5aa6c4c13c5bc8cf25145d62e3896331661c94d3d8195c51d. 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/US6JR0982007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6594fab6cc48f51b38c37775db0cc8d730599ae9d0019aeb45f0cc82e60c56c9. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/US6JR1282201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4a9f103e1c4644dedced054d909d0e1eb777b42179cd7554c5d455418cf02b. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/US6JR1282203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8176d7503572cfc3a980a0d9f6b753eaa9f1f00c083124d7514cd45c25e9ca0f. 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/US6JR1282206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd20f881593abcdb48a9934e5f3ca569ee92ac5ece4281868d9ad0b6c777704. 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/US6JR1282207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44761b6aeccacc37ded8ad2041208627c1298d11cc5f74faf0f5431d058cbf41. 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/US6JR1282208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bdf3091c1f5afe6438d02e44d44b1960ce643c399c9c229ea3f064993757ccd. 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/US6JR1382303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331038e459cbfe22781ff2d3d848c5f7f6e07aabb643b05a9f6eced617c6f34e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/US6JR1382305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11f027911fbc436ce9099a2259b06f4dac766077e17648c138f7a4124a560d9. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/US6JR1382308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ab0f73168526c80b389063e358c11e5dde1085fa85b641cbe1bd306a59ddad. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/US6JR1582407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34b2aa1b3e7172552a122a100f96c4535eda2c3944476460b5d98f37fea7040. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/US6JR1582409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a206f6844b6f49c48a8dd49374cab97a039f051f0e052672ca01d0d67b62749. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/US6JR1582410.