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 0xb26425f2ebdeb6e1c060fac3f1fb956c9b99024bd46658abd2356da6b7c80588. 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/87cef290-adef-423a-b0f3-2c5f1c14f037.json and https://artists.proofprofile.net/proofs/artist/87cef290-adef-423a-b0f3-2c5f1c14f037.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 0x89695aabf0a97873f46a0c5cc5b9d338a31bbabc8061ad0629c85c61df9b50b4. 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/ZA4PN2000125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd854e12e1d67243769bc9fbcf1edc306d04322ef6318d4a02a6feb49f8ccbbab. 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/ZA4PM2200502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ee5c6d383d5ebc6d290d643604a74b74b75ffd0fafa4d2a1b23c58ffd92e10. 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/ZAEI72300101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6537b29e9fcde03d11de48c6ed21863bb5726f73514bcb745925e645f1f95f. 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/ZBN532400025.
Cheese Melrose (feat. Semi Tee, Ma Lemon & Kammu Dee)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f298dd3d6ecd3482c212e614fe1180cb5b546e6c465a9c914978ef435359b0. 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/ZB1OS2200064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b519927786cd40214779282badd85d5c9263e7ddd639f41fa81b76a465070d. 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/ZAUM72202524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e3a39160d5b0860859257c14c85f13c2a62052efd389388bac6ea488e9fb64. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/ZAUM72202517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93afbc0b5b6bb676351375ddb4072f3f9253a69e22b811e04136fae8684a040b. 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/ZAUM72002135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc984838ce5f6cd9604af5de3df3f28aec5243955854ec1596b76eeaaa6431046. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/ZAQ652303178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2918b02193ea8e22ab99477ead58200e930eec5c4b6fcd8c268e5ade2e5a08. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ZA6EE2000057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0ad18d11afcfab134887ed24f61c55ba108b7fd998a148d0a6048de4b22486. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/ZA6EE2000185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b3ecd31737145e8ea54b1f4a5c4089cb50ed44d07eafa3065408ddd4f6703e. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/ZAC012201092.
Angeke (feat. Kammu Dee & Semi Tee & Ntokzin)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x715046bc11d652da6c24c4e8b83d1d335f6a0863d8d49f39b711824fce16ed39. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/ZB3E42200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b048b31e148a4ea55a14a761176d4c581505ff257c17df707fd67c402c3eed9. 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/ZAEI72100383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d588e33b103711aca0959747aade9b35f32ad7d583e6d1f248041a5a58c4f2. 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/ZAEI72100386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac57f2e89b1c003e9c8e66f879195e5c9c5ed63e9d6e6090a7e246f086c9abe. 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/ZAEI72100358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe470ec46df056b62456f4c583bc6943f40fa784a2bf1ee980daefcda8a6208a1. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/ZAC012201600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac57f2e89b1c003e9c8e66f879195e5c9c5ed63e9d6e6090a7e246f086c9abe. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ZAEI72100358.