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 0xf2b4054812b74cd27a2d8837aece39607293e775a72a61ae4754f4e0d70e3d1e. 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/bde9277d-e548-4c6f-a9f1-4130fe60c331.json and https://artists.proofprofile.net/proofs/artist/bde9277d-e548-4c6f-a9f1-4130fe60c331.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 0x94bbc3f59f008607ccef93bac764440f2907cf052ab3a9535bd6b444cad15e1c. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/SEYOK2101761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a2780dcce3d018556b3b1ade04da8fd3e82d018eb980b4c94491e0e136757d. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/SEYOK2109776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x072aa9df036e6f47aaa6861da5934eab7b9e95dc85e857f51043dafb8514cd36. 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/SEYOK2118810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa053a7bd52c550a8e8fe5d1109cd97fd15b0bc8828167fac541e2c50a26a7afc. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/SEYOK2140432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0bfa1ec932c3f99a41088b83a2390257bcbbbc8b27bec816fe078d55d08e626. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/SEYOK2200542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x209c29cad97bf2e93c8040facae077f9aef1b2a054a54222c8792d07162a78c1. Chain 2 (Bitcoin): anchored in block 958496 (2026-07-18T04:43:53Z), 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/SEYOK2205003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9d50ed8227f1522f70c07bd70c3561acaaab0c7486d958a9b24315c7418564. 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/SEYOK2205373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc11d9edcc52e1324cdf0f397bed202ea0d4080d279288c64f0f8a33ed0b0bc4. 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/SEYOK2210725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5bfe30cca62cb79fd43ead5792cab99117633c6cf6fe5c629291ccec3494b6. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/SEYOK2230540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5764ebca765fb2e27f978ecbef718ee60941f5daccadec1fa5e81a9fb0ef73b. 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/USANG2225494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1a0307a081188a1776e09c666a6f088d017ddee52278d953114017bb007e5e. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QM3DF2279427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d4ab2a3732cbdfb9e8a7c210f44cb2c62422388f377b7d39b54d22452824ab. 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/QM3DF2279448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f89e2d1b7ba489be2393ee698fca5bda34bb068c02f7f4b0a0be416f41b6a4. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QM3DF2279453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c3db2728a7896889b0cebe7e64817c8e92c6bd7189dadfba92e5761dc53fd5. 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/QM3DF2280068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6367cea79276d26d4957c84c215062f875860e77513ce1dc3a6b249c889b781c. 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/USANG2304996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438f0d71793705a6f513b0f6675b7f15b2b495ba2c15ce9063b98888745fa62e. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/US3DF2307054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d3b7677228efe4fd0db498d02ad07cc1c004f67968764269456a7226f599c3. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/SEYOK2409956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0186a142d1e8ccbbcad564ee0bb2229298ff7d0e4144fa01a2826aaf240bfa6. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/CH7812411865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc45fbe646cc970f0f38bf51a4bc7fe48a3ce275741782a51376fe086ddc91be0. 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/SEYOK2413628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d216a1ad4dd8c439960d1f6bfeef157eb9bb56bdcc111d0b62bb26e01cba67c. 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/DEH742440601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4709a7d57c0484ba473eddd8745c9779f806d1dcdca477da7b3e06ff93a5710. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/SEYOK2505561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe62600520ff6ed1f15511e778cca161c0caf293d0a8f98885a9f4f049cbe5cc9. 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/QZDA42278676.