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 0xbd4bdc491ea9053e8b0da550ecbc3a6e9763971d0376dae7398395d4cab6cf31. 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/9cb23ba0-bcc4-4eed-acb8-86db31868c37.json and https://artists.proofprofile.net/proofs/artist/9cb23ba0-bcc4-4eed-acb8-86db31868c37.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 0x1f868cb0aa66775f1cdc4c261240dbb0c3cfefcdcc5e16f37b889cafbd51c521. Chain 2 (Bitcoin): anchored in block 958487 (2026-07-18T03:43:59Z), 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/SEVWT0400201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d76587e6a654f558ee9a4db69cd6cbd609ed650f6772a4800a24f5447bddea5. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/SEVWT0400203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0df202a6889a7ff787e10135011f97c46c9225e372623717bf399299760ced4. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/SEVWT0400204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad6c99b2026f70de6359ef3da420587f3f019e58dd0235bc7ec799ea2243d96. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/SEVWT0400211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51d9875dd036139e71debf25004d75c95ff028081ba6df8e75edfc3828469066. 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/SEVWT0500401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf537bbce6ff2e46a1bccec223a472ddd3f11b0e06e991fbc81ced6c458102aa6. 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/SEVWT0500402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52dd00dde5cf9b07f9dd8e363760414ff6dda15c6cc6b26c527882651daf3035. 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/SEVWT0500407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a324815b929cba1e081a15fe3db09729b99b3b8a1bd1d4550a55729b41d4a5. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/SEVWT0700301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609c5cd658b875ef895d1b7de48b5b82297702237eb91b182f63d67ec8e630d7. 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/SEVWT0700303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x227f2f017b97ecc48dbb78804146ffd63020cd9a1a533cf0422850477b9fcbcf. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/SEVWT0700304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9221a6f45e19e2a501d5b41dd5da84785277e5606782bceb8bef3af18dae8f3. 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/SEVWT0700305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0f049d99902357306be88c99546a7268ce316192265080081b2fe57ef941ac. 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/SEVWT0700308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2243bb278663644f09c7bde979305923dea784d53481798feed0aa197c7eecc9. 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/SEVWT0700311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x388c1dc2b3f4945d2daba880b2773597c2ff4cfb85d06d71a90ba75dd9cd57de. 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/SEVWT0900103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9b550b96cdd96a99501f8901e0efa9572dd64116aba883a12f554c6bfe71f5. 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/SEVWT0900104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad99057709ade092bd7b12a2328dac3057da8361196c03a992393e484328f97f. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/SEVWT0900106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b2a2640d1d5ee5660be45e2337e061c8ef2ecb89cf0600567c0f901a5f48d3. 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/SEVWT0900107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf249318f2f2ff4ae330cb8d39d3aa7b628cd71aae2af27f714f10d1d950dc00d. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/SEVWT0900108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d26463c181dbb48f2e778cbc693b133798aeb1a4f1d1000c4870baa93b281fc. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/SEVWT0900111.