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 0xa79957fb01ecd3a94be5687abd6bbd2bd8735bd72d2ad5ceb459b36f59004bcf. 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/45dce563-fe9a-48ca-a8fb-619c3e2eedbd.json and https://artists.proofprofile.net/proofs/artist/45dce563-fe9a-48ca-a8fb-619c3e2eedbd.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 0x7deb0881ea3f8824b0c619c53f2191cc6b275afc08e0a91c30609c828abfa0fb. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/NLD8M1400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb379ed0f1caf70d83dab102520d9d26d343d2ea68272232171f1a1378a66668. 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/NLD8M1500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96bf67b2b7adcc8b3e1f09a2b52e5e9af7dd7e7223e232e40dd496594dbe0373. 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/NLD8M1600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51af0dd71ba688ecf89ca38b85489ce8714d11f61cd732219f1ba4307e40ac3c. Chain 2 (Bitcoin): anchored in block 958573 (2026-07-18T15:49:54Z), 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/NLD8M1700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ccc3380e360bec7f5cd6a428af7dd5741df752a2206fda8bc37b73f04980a9. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/NLD8M1700006.
Max Verstappen (Hoe Heet De Zoon Van...)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51245f2bf7c7919fde31a29b2f145ae2d56553972d44843140cc87d3d0a06d0. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/NL2QQ2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f1abac7c28a7ef9c7e699fbd8eda72f7e920c3c5980c7ddc6f1b2ea945141b1. 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/NLD8M2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c9c8f8051447288e0e23aaab074abd23b1229bcf6d7745a12bb5c26bfba2e3. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/NLD8M2200053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7887bf032c27564956306c05f6f4fb7543462384980b245ff9d18d2af6a7d24. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/NLD8M2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7887bf032c27564956306c05f6f4fb7543462384980b245ff9d18d2af6a7d24. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/NLD8M2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac4de6da2dd32b5ccfc9064ec11f0a3cd01bfc7ac9f8a32fb52086ba0bcc699. 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/NLD8M2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207c6bebce6ddef52d749f44ab9e6e24b373455060030701b4a34748053d0a15. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NLD8M2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2995653db4c578aca5bff8c8ebc03e3edb458b3f779dda52f25672152198f2f. 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/NLD8M2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa96e31c6edf95379f5f6a8c8c1c8ba52249c91dd4e43f8d22d86428938f6abd. 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/NL7GJ2400014.