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 0x721d3a447c613dee1a0ecb090e050d094ecc03dd3d3ef5725e76aaf4704fc4ad. 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/dad97c88-58e5-48a6-a82d-a52a91578a97.json and https://artists.proofprofile.net/proofs/artist/dad97c88-58e5-48a6-a82d-a52a91578a97.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 0xebd5eec12482a357038d855460a5d335a3a106bc2566610b0aa6c8b559ae7487. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZDA42581824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612a5fc363d97f74746711235d47efbfd41d9a82ae7154c6f7b687cf8dde2228. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZDA42581833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dfc7d21d5ee02a7540b69de57ba5fb3354cc220c27692da1add23f635b8c3cb. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZDA82540350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x211999f9bc7a3660b2341db747432c461a963bc33d3f0d0f61659d93ee9e35c6. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZHN32549376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33e298db73b818623c7ab690d31199689b78b4a931f5cf65b7c4d7e8db95dec. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QZHN52553533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb0ff638094341e1fc341060f141bf3a7245ed107490fbd889fb231a9913bda. 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/QZDQH2503467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524b5cd45368dbcbd78c5c2151be810fa18766587df0b476d919c306c2b7fe51. 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/QZDQH2503465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877316fe0c38a5e51681b21e4bec556df82daffff660e6e06ce87ec5f0204b54. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/SE6XY2512453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750f7283056f18ea54d1aa6914bd11e50650b162c4291c80ea7be9585bc77939. 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/QZDQH2504273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b9d5eefa0ad1121aee015684882e8b0aad6d4aacc3f7bee28f75cf3277ff89d. 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/SE6XY2517359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d1d7cc9645de8ddbc690d97ee52b412d3b8b68f4c45d0527a072b13042b570. 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/SE6XY2523135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x239c91d5693f1d8f6c4c12ad6907c98e142d33e690a89511f60e7c28492124dc. 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/SE6XY2533880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da4c7f527b6fa929595d18d74c38976ad382c8937b387f1dcbcd781b1f970b3. 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/QZDQH2506143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde838d0c35804cbed5aecf183d685a47b011296a03e5b59d2c2f2a5cfa7240c. 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/QZK6G2544318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbbbbdf20971d84d55ea36a0e5d69c2873f794394ac4078768cf2ec75ba9995a. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZMEN2589289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a5e13d9db13350ea1ef5463cc3b1c2384a4a96a8456dd26f608769b234f267. 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/QZNWS2521208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67eea17c284da1991953d1d4acfc5ae97fdd6bc29d9182c9b8de60190e3d0eb2. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZNWU2565551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112ad09f13087eee92b94f3996a4660f0b2eb4f540fcb943af17888141cf891d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZNWU2565554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba197486f9a00116cc23d9709cb0757fad7c9b84a07da74e685484cc1cb951c1. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZNWV2599412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1dd97b4dee255cbd2b051131832bbd1c0967b8c46b69a63b2fb11482069de3f. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZPLS2525387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39a6bf5ab85d9b7237b5cbd3deeb4151fa2d7513b543daee2b66cc76320c289. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/TCAJQ2537966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2159173d19ef929e54fc7451b1c4978bd7f506d111d1b97c8178c337b8048522. 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/QZTAW2598044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ffcf8283a444550b2621eae1bf36ab936230fb50e54f0d94b241505ae2a51a. 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/QZHN52555136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ffc41736f1c3079e02fc9a0c3b660c0ad696d510f739620978a0e0aef787c2b. 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/QZHN52555138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x516cfdafa3f40ffb8c11480cb8bafd7b260ee4cf1120270c9ffe3c3ebdacf84b. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZWFV2579850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7936137b0046b33750a9eae042ab46f0b679574ba32bc43d3e70947b73ad85d3. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZWFV2579851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4281813c67a50b27f0c22c2b83eb94c6dc1cf7f5eca5a33cd128fd77f7de524c. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZWFV2579853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499ecbef86a7e220f1ceb3618d781c5b4442831a5f4020099e3418b178b9c4d5. 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/QT3F82596156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6b2671353e5f47c15f1807445a228026ae39a1c624d932716c77b5181340fc. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QT3F82596158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b2045826c732352517d3052b88567e86d9836332c8f5a2cb1d12136b74a569. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QT3F82598376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bf94ae2b4e23137a27dfe4ec671caebda39ad38621ac322dcfe24c7b736c61f. 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/QT3F82598377.