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 0x34f99828a02e7caa5330fd23c8d3650c9807dd910a88899e344ae7d205b26e3b. 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/ef887626-1012-4aed-9bf7-cbe669199b67.json and https://artists.proofprofile.net/proofs/artist/ef887626-1012-4aed-9bf7-cbe669199b67.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 0xd4b67e3b6dacba0917eba038de42a89a60a5e9f076172ec7b1fc4fece04e0264. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/FR6V80299534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d647d315882a6b81be388973889a91dc64119e9433adf1d6bd0276760ed1f5. 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/FR6V80299535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e442e7a75856375a1872dddf2a9f5b975c22c6824d256df719f3993f290cc0. 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/FR6V80299536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64494e615c62a708f2ec61b2735418611e55fe72a59c9d8d2662a9ca20180975. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/FR6V80299537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579f086cf8274be6f63942f3ea124455a1441982205f4765c46cdc7ca7bf9f2e. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/FR6V80299539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8668ed9b0e942041516b90f3c8797df975d7d9f5077ac90f69bb5773e5bd1c. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/FR6V80299540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68657278237ad3344e015e6b3e883eb4ff642bfae78018a9ddbe2061f8cbb7e8. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/FR6V80299541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69fb5d49475adc44753bccbefc56af3a58527ebe53fe393ddc1bb301f18620d3. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/FR6V80299542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6733067d83a6c2554ac6707736e3cfb6f5da20210b78a5d572bc3d00ea3afc00. 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/FR6V80299543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x900270d1b59ba7d6feff451d41417e88c3f22b33220b09128943aaea2af38483. 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/FR6V80299544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8370e6ab2d1ef3a83d13f30f0e4f6b610b0496608025b3a2188dc6a5a84c9170. 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/FR6V80299545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547ff954dfe06cea06cb53bb79d9cecdab33af8dd89428e89322285bb5dd4223. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/FR6V80299547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fbadba918c834828f3ee18829d291958d7baaf8529212b693bf4525620d9398. 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/FR6V80299548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4727557dcf09ccdc1e0806df91e5a74746666b59f9c1ef660432e11930d76fb. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/FR6V80299549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4591da268c06090f306ea1aa8132c275cbc8ad33631807a8387b2f8f88344ba0. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/FR6V80299550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb2b121d8dc2e487030a2c7d8be6162e0ac7446e7a020e405335492abf0820ae. 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/FR6V80299551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb6b07ae2a4b7bc661ff1016e194f1035b55d1cf56aee861ec377af77d6922d8. 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/FR6V80299552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda735ac5d4d188fdb5e5db5d2e0a5d3c0ea9b1c826202ae2e5deb67a26355a90. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/FR6V80299553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df95e10274c15182268ca451a0bc87338bda23a98c046a9afd9036e48e1ccf5. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/FR6V80299554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60aacf5288536d1cc6741a36ec9ea4c178d10ada92cdeb1ed44e137a85c2c60d. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/FR6V80299555.