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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4969851732b6fd3a5135b98b607004a9b9fbb19a67eb9883a69b5c094efa1b. 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/2dc0edb3-c371-4afc-af0f-53888729edaa.json and https://artists.proofprofile.net/proofs/artist/2dc0edb3-c371-4afc-af0f-53888729edaa.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbefe4418db984d5876fbcd885d684d99bf38a5c4c16e523d7b3a9440d0da6ea6. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TWDL72401611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc025775649c8dd1aa6dde7d373558cbf758aa3edbda7121efc69f86e0754df9e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TWDL72401895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2feddeb5c70b925c5830e2d3cf763f86a519d4c1e4964287d4988bbf21a7dd4d. 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/TWDL72401862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ccddf37ee0d40f4f8e93a21cbe8e4d8c0bdad7d2554ad961eb186de2efd4967. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TWDL72401731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179eaad9b64a1b8363203c0609caf3066ac3cd6941cb85a214d0ff1c75f7eed3. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TWDL72401544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7d70f5398b0409c50aa33ff6b522a112d9c868c88992756b0e27c732b6c2d2. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/FRX282436289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x922d797ba54ed4479ac0ed4bb8e3394205f309f1b8988ee36217314f9269e759. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TWDL72400597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6363312602725c56ce082fd17d054960ed721da73faff7397be4aaba9a2496dd. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TWD252400044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0becd0c1108c7a7193793c41d771329cc09215732381dadf6f8837febf183a9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TWDL72400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ffa3f16abc74d5c993ab8c91e5a87e1560b636675781e1d188a30a9b9903d95. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TWDL72400051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b5844a012b2713714c6f29285c0f0218c500ae442bb6da1669664422f87432. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TWDL72308083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe41fdd90b9565be4c84256a08e9ac04fafd5d1b4cb899e1800635ba9e4c0021. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TWDL72307401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9606fbbfa29c785ae2f25865552808f3389cdb0f15dfbbac4b9dec0a8c8f7bf. 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/TWDL72306734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3365b4e793f81757c197189edafa2bc5f149cb4e632abb5240e28ca66c2abb8a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TWDL72306682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec27e224c389aec7dfbdc634c888febd4c36f5757d30c4978d2f37439b6b92f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TWDL72306206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dbb525d3776a787b369796d50df092836083e6846f37878b9659684ecaddad8. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TWDL72306224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a959efc42a3a265242c3ae121e3e77050282322192e88ba4761b034b1f910b3. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TWDL72306072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80af4d221831d2bfe4bf93857b488e948edcbd7357e590e5cc83ffb8783c10b4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TWDL72301468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb5554546fa673b7dd588ff48c76788dde52ae28cb42727b72fff61006dfb869. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TWDL72300432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c83b46537f1dcb0a749e11a8c3d7e36f0fcca4b312d666f0c09967303c0487. 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/TWDL72300435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a0331e81be5607c1b30fd2d6d0144f6afc0e042ef6e9b129bfb0b1b21921ff. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TWDL72206302.