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 0xa9615149ed6cd1839e0c685368e29a42bae310beff8095bcf906c21f5d3a691b. 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/09eedda3-a8ee-49ef-84eb-747b9b87fb8c.json and https://artists.proofprofile.net/proofs/artist/09eedda3-a8ee-49ef-84eb-747b9b87fb8c.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 0x09842b590f278c2aa6610165f838390c5064d5c707963d6027e6415ce38f95ac. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QM2PV1805371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e334a0699ac849161bc97f98a2d8a7e3a6060d8b2fb038f71cdcaa19effa41. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZFYZ1985264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd5536e22862ae6d1402cba177e80352249e1d44909f8850a6619600fb0eed6. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZES72050082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8930d01b711f142717e75bb46ab3f0c43efcc757ccb053f4861b52bc0e367d9. 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/QM6N22279913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e7c7b56c17a783cab101910e8d87d70fdef75ab5b9963edfb58771ce22cba94. 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/QM4TW2337307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x587448b2fa914b0bc923df0e9151aa16edbd8661cc8f071a2512712cdbbe7e49. 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/USA2P2329478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3aba03ef58ac7eb20d1f8f23ac77de212a0c32fef480a3beeafc34a51a33b2. 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/USA2P2405347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048539355bf0e63b02886ea2eb104b013527ae9caa65b8a1a3fc53cab098873b. 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/USA2P2409462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8751377ac2b09d0906d6275e446a3c1bb7ad9867cdc770c3f81863e811403e00. 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/NLAM42100169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2db18843f134dde1c47941d3c6afc85b9a29d825f07b63b993b19879e536dc. 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/NL5HJ2300082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7c965de04487963c9466765cf9ebf29b25a790916d194dd60fddd15c54ef95. 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/QMDA72139461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f88cde102e63a8b6261d5931838e6fe488af686d78807be1bd3562cd8457b3. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USA2P2262925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf8acb55ed795c99c70bc33a4619be3b96b9217a67c0f616e8ce125552a7dfa. 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/USA2P2357106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b953ef7502802ce40da8a63f1026f533818d6f7685ebf4b13794c48e1db2892. 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/NLA6A2400091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bdafd65acd6d444f60068cb6adefcdec4c314bc33d04d335acbbbbb5a1bef02. 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/QMFME2413712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab1da203bc3d98a4e2a7d279734edbd577c564a4aa24c396183a861858831fd. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QMFME2375774.
Vannacht Slaap Jij Bij Mij (Joyliana Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1eb0a97eadd0c47fefea0f43616c4cdce8b939cdc2e5053284a3a07d1458d8. 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/NLA6A2400188.
Vannacht Slaap Jij Bij Mij (FEESTNATION Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb148c570b2dc001fb156b6096447d4390f0114fa685843c95bad75b2016dc7a. 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/NLA6A2400189.
Vannacht Slaap Jij Bij Mij (FEESTNATION Extended Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97fb0d5c7a70311ae471b93623bddca3fa9383c03fecad82e51213e344a0203d. 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/NLA6A2400190.