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 0x141d3c7ce9709eff540fbc82717cc801574715b23da459871438b023f6061b94. 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/fcccc50e-d8b2-40e3-ab66-f73588957f5c.json and https://artists.proofprofile.net/proofs/artist/fcccc50e-d8b2-40e3-ab66-f73588957f5c.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 0x63dafa70688d5869e8b9a422a5795b2188a2401233c74f4b74a140a6edb4d994. 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/DEZC62024429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cad12aef2f7341e59225931dcaff4034e587214c784441bab20989fb7ba7a2b. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/DEZC62121546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x968ee075a4f434e254ddece96f0ed50c5db0da73a750dea382dd5a308ff46686. 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/FRX872274378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae215e4c757cde20a67e3faf9dfaa159ebbf51fd29390afca4e4eaaa475b98e3. Chain 2 (Bitcoin): anchored in block 957833 (2026-07-13T09:36:32Z), 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/DGA062229787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc96a533596fe43ec38a38240d2a7647d63a4e35a4baa137b12fbd3d14606efa7. 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/FR10S2397467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9afcb2b7239fe0d4594c119ac2f0faba26e5d72e996df3c49cb9054ac77491. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/FR10S2397464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82910e8e53a97ee4a91acd85e00a9494d3122e975e2ef1c6c9c948630c3288dc. 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/FR10S2397462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48915192d0ba910c5e450dd780884367a784269430183b263218b46c21822c45. 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/FR10S2397463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc96a533596fe43ec38a38240d2a7647d63a4e35a4baa137b12fbd3d14606efa7. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/FR10S2397467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8946b5603603e3b72849ca438b27342ce97f3b671ad8c9c6ed03bea5a019eff3. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:04:55Z), 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/FR10S2397468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad4320094f3bd26b5579f73021ddf922e0288ee8acc46ceb9402dc1bc8389e2. 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/FR10S2397469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8712e540fc5a7d97b0587397a810297bd0aa4f4f921ce6f5bcde77a9e61e29. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/DGA052371449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72fbc19f6fd4c771d10071f95202cbdbe3b6709f047751aabd6da83a55285d55. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T14:53:53Z), 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/DGA072376570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd0ac0bd35cb6a7c7bbcc7797ac8fbef75440c69e757c5f2f0a09d08be64f5c. 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/DGA092325732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f82d966e3de206aa01d8a488f530a5c18c1776ebccbe1f7e6ff78cdab081dca. 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/FRX202479014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c17bd4e935739e287da13f5f3f49834eb2c7f53b87955005d2a0b6654459a4. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FRX452465813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b28c9655b835c3bd66007604de5fce7ade84477cbeed073e61b448f5ea0048. 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/FRX872436551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x090cf8d28c783c542bb9974234052a7faf699fed0f9201f7efc1c4209fc4ff37. 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/DGA062454429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x090cf8d28c783c542bb9974234052a7faf699fed0f9201f7efc1c4209fc4ff37. 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/DGA062454429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f82d966e3de206aa01d8a488f530a5c18c1776ebccbe1f7e6ff78cdab081dca. 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/FRX202479014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf6591715154d7485369fe50913961f405f88db1451d8406959dc1730f963a97. 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/DGA082467579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b28c9655b835c3bd66007604de5fce7ade84477cbeed073e61b448f5ea0048. 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/FRX872436551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x969041389f9e4c5ae72671ec316ce009ef80893cac8ff9bcfe30017f1670f33c. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/DGA082467582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c17bd4e935739e287da13f5f3f49834eb2c7f53b87955005d2a0b6654459a4. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/FRX452465813.