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 0x7cb23dd2916980c9c7cd87662b9696f657d4460ac8d84f5922a4349d54c617ba. 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/8821a3c3-9003-4fa8-93ed-76fba684b023.json and https://artists.proofprofile.net/proofs/artist/8821a3c3-9003-4fa8-93ed-76fba684b023.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 0x2f168afa13565421fb00cf31b7ebe4a42c8096062b903359eba1d07fd1101898. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/GX89G2407540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe61ce842d9e3820e0c39f7adc219593ed90e60c31f553ebc169b96c655e06f6c. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/GX8KD2436087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde31ed29c3d52f4ed953ad56b5d177636900ac221b373492c59f85822aff787. 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/GX8KD2470969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf743e7f57d47bb93f6aaf67f97885eebd6866e04013bd7f6a1c388597b14b056. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/AUMEV2381836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a4bd06b882f0657f0f895c20000e18b6af612248921a9bc485aec0fdf7a28f. 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/AUMEV2381837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4849821b3b53756dd0499a45199399289be8bd1719a8ea263f4596d25c6b53ef. 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/AUMEV2381839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f375a2bf5f0aa00c7758389bd491043cb7d72ecf89e80c9c64471f5530ae21. 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/AUMEV2381843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4860659889e8570c7954fd9afe4203a55a0b110e87bb51d2c632e079b9375ecd. 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/AUMEV2381848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31219805b26f836f8bff780c7cc2f520f33efa326309306c1e875759b1c5076b. 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/AUMEV2381850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x834cb6dccdd40f96fb88bcd24c0528d9fc04b96f9cbe2afe362cc8e9ede7d5c8. 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/AUMEV2381852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73540b4b1def084f491b7be14dbd24e76f75c87619d6a7b08eb9e575a955367. Chain 2 (Bitcoin): anchored in block 958143 (2026-07-15T10:15:04Z), 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/AUMEV2381854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe765be8851060c1ae4d77f177bc620fdfe8677e973c80f585245a7ccd8375eb9. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/AUMEV2381855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b2c3193e73862cea1c7f796c3a0754ed00ee719d226307a8d3b862c3c464ef4. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/AUMEV2381856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc93b151832b38ac092443cdf87f6f6e97c5de451eb45a96e27a81c3d7d8266cf. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/AUMEV2381857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b3b3fbe1d619b8038e3e4d1229ebdc4c8eaf360007a43255b391e0a43a214c. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/AUMEV2381858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1afa80dd8103d81f92b9b566a7f3c43a01a6bf41f5b04275a87a26f88b95166b. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/AUMEV2381859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa28aabd3013b3394c64755927b69a66899b8031262494fe8116d22294f5f8b6f. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/AUMEV2381866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528fefda688d5aed48b865dcf165f01c5028c877febe8884044efa2a8480b088. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/AUMEV2381868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ece8d4177f15f9d234dc05c14976c3d178a74adf5230d1bdb7bdd736b6e2c6f. 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/GX8KD2422368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0b29bac3c0efcdacbccdeb296d56989d81c2a9fd23197eee8b013851bd3e9f. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/GX89G2464112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ee0d705e82f70d550abeb2f4af705d175db6e247ba25e680bab94fe80eb733. 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/QZS7J2311929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3c8e4040179817945f23e663cd381e9a81b0d2f969ca8a417836fb50ff7a26. 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/QZS7J2345531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb143e4bd48b31d713b07d6edbc2aabe23cc8dd7829b8bde6b08d104542a63f19. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/GX8LD2406961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a7a6e95ff5a6bc8695e5b856ac6784bf73db757e2a262715101c01b8bf3ade. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/GX8LD2496756.