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 0x495daf49f600f4137ff9b90b20ce1ccce6a7e0978e946eb471c0c1ec2e3cc35a. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4ff0fff7-aa59-4a9c-937e-3158e98d2500.json and https://artists.proofprofile.net/proofs/artist/4ff0fff7-aa59-4a9c-937e-3158e98d2500.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 0xa2d494d518be28b3ccecd2bbda1b0832f427494b8ebc5f705e30d79ad0076ef0. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CAGOO2127130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea3c1e6b1e6c1159927fa5a971ec614931f8114516790a33afcc59ee13b33bb. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CAGOO2127132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c863c4c0ec97439ca6c96a3d87bbcfcac230ddb3d6b54b8dfcf901e8221cbe1. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/CAGOO2127128.
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 0x37ea9d562ce05ddcc9049dded56d47984a6970a2ec92e38a2bf5c6be6ace3238. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/CAGOO2127127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef1b2982464e16434d4458734ca0a19d09bfa4e2e3f97e11449ed56928d9394. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/CAGOO2127126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3399b89a224cf2c6f09992d3435301f12ec10ae4b4d5e26e873cd761a8b0e05a. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/CAGOO2127159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e97ed73c91471c61474879c36f6de0932d4a4bcb6293bbded736e0d1696ac8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCAIP2408689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd03f5c3c3393e4ca56dba39cd8230bf004043b2185ac4ad80ff6e0d2de98a1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCAII2418548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24872cfbaf6cf8eebab273826d80e37fc3cb01d6d69229bc83b6eff5b693bd45. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAIJ2438480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x369ebe0f3517accab0a40997befcbdf5bd7a26c11a9b12b52a11777654a5b2ce. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAHM2398514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf1f4a455c65ef24deb3ab93b0bcf8d9887dcb15b4d47a2f64bcabe13ac28a4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAHK2383642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x759347b690f3816700d869e9dd3e205023d81ae7c6356aa6151454292b4b3544. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAHI2375828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799a86a7661b4c224e75eadeccf134769b0330d253bd47055a46e03027f61828. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCAHI2311661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8716218b89484fbfdae1d0f9aab7f45430b460cc538f868e955a6d55f811fe8f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US7VG2303726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803068cc5d9370ba17064093a0db88fdeaefbf99042b9d9feae10744834a0d4c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAGN2264617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3b832827ccc5d05c9d565603aa1cf53886cb02b5bef0a470dae17e71b54b6a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAGM2217045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f09de12f18961a569c7dbd1270802b62cfe7772b76e7d42caada48077bd7a8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCAGL2245345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11664d16e0aa4d80d6674cf9fa85543b5f63be15b7dc2c4c962068b98874dfd1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAGI2253788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31a3f8b19e3991bea7e8fd93496fe829b5ecd86147ed4638a887796fd580b02. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCAGH2277005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1760c4b452ded1e424adf7a98dcf254419aed0c26269f354fb5ab84c214565. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAGH2276929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c469b49b44b1f39a1fbd94c68f0bb87b1107a80b591ca22cf1f5bdc8ef621eb. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CACWV2244991.