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 0x1b78cc4a010ddb3b3e9fc8732ad584dd220d760c947cd60336b8811d32b98789. 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/958c9d7d-3949-4d7a-b604-e78164bbf4c9.json and https://artists.proofprofile.net/proofs/artist/958c9d7d-3949-4d7a-b604-e78164bbf4c9.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 0x2e6cedaa3b0eaec9ccdbbad5d3fad37819f35879c3a47ba60bfef468a534f851. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USA2P2420784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e6cedaa3b0eaec9ccdbbad5d3fad37819f35879c3a47ba60bfef468a534f851. 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/USA2P2420784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3187069cff460c49160b3fb37771c7ff92b84f22edd7da2ca1030f4bf96f8d47. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/USA2P2420780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e6cedaa3b0eaec9ccdbbad5d3fad37819f35879c3a47ba60bfef468a534f851. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/USA2P2420784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3787028dfa047a8906871142f748c4029ba162a97fa9930ece8142dfa984d5e7. 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/DEG932405846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff61434fed22acabfe1b6a41278001f17178e0ed46c2c2151eb3439727b191fc. 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/DEG932405848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc60cf3e9471612cb04b1dae19c25cc70f3f0af18e7f99fc8d48d546595a34fe. 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/DEG932405844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad33f3fc73e5db597450ba0e6467281f7a81b58502ad741134a7440a1f17534e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/DEG932405845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3787028dfa047a8906871142f748c4029ba162a97fa9930ece8142dfa984d5e7. 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/DEG932405846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf19b3a7090688aaed95dd961ccd2ca65894b7a351a78372442da49523cb0a30c. 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/DEG932405847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff61434fed22acabfe1b6a41278001f17178e0ed46c2c2151eb3439727b191fc. 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/DEG932405848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x926ca21042d8c2b90c9a6714fe59f74336cb8fde34647f0581911d8ace5e840c. 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/DEG932405849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37533c2038fd94a26c69b86bd8721a188ddbf4e26302dcc4aa23c79025beb145. 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/DEG932405850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c0e41fd764923ccca93fb15e87ee3bd8a5023be609a47bb346488bf53991a1. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/DEG932405852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x064dc9b9ad570972c1a00b399dabb83ad2304343af77109018f00a9f446e6248. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/DEG932405853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e68876ea4ca0db24e4336295e975102604e58da78dcadc58ee7a00b335bcca. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/DEG932405854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f2d578ba8cb0748ec4573a28d97d381a97e750992e3a9a4e65ba23767dbafe. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/DEG932405855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605348c089fd0c32cf42d022968370e554536039017dc13a7455869446a8738f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QM99V2408901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d52a7e51588625574f898547cd77261fe03082260a138d17f8d55d8574a506. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QM99V2408902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c87513c845976917fd4fbef585fb3970f00f2a874dc62a52612f478eb970b1. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QM99V2408903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8979e419d46f52e17d52d4c9cfd6e9dad06417287466036d2adbfe797a5f5543. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USAT21500241.