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 0xe93a877f2bfe40b530ef620314eb92a6ca6a837480cdaf2508163f73bbc323e3. 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/caa76186-458d-485a-b880-55ea867455e5.json and https://artists.proofprofile.net/proofs/artist/caa76186-458d-485a-b880-55ea867455e5.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 0xcf9efac082cea0074501d7352f89807495021f9b87935f5e73841445e7d04bec. 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/NLT2H2300247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5d7c1c491ebbad6c9af9200903ab1d2b41c723060681d78e54ac5583a1a854. 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/NL2QC2101327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x980ecf722345369fb41743259a986525cfb5a940a6cf86ac146f1e076b159852. 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/USA2P2334419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23fe238c3149724f197de61b6763e1254c5d2b338ee2b581e693a3c3b959a619. 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/NLT2H2300705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3693bb54716e228eaadca6f833f06ee3d50e39416004f780441edc037167ff. 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/NLT2H2300653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b63843f167b83f9715b58c74d4f35d7ad369c0790d2639034e7ac6dc66194ac. 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/NLYK92300095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12264928156c1b14a17c197b8a3d8c54354f519d9e91f1ebc81cd133e1b362cf. 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/SE6SA2319911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x138537dc489e4fbadf09b00b2f97ede4e5d49051a28b377230409154213555e3. 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/QZPJ32227359.
One Night (R3 Bass & Alessandro Myrex Edit)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1552377a78d2c1b1c9eb065f42adaf31e46fdcea04043b25d2c567c058929d9d. 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/GXBDS2415106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63254c5d6ad24608829101cca6f0d9d369305e51eedfd00b8132606256f0ba78. 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/DEXO12470644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba3bb92b26f99fa0c14a76a3b1ca188e28a91f8e042413bdabf34ea2e20a764. 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/BE8LH2400151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f6ff7f4e15367bda85c69801502c2f9610dc0567f27457fc759d4ad81cb27c6. 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/BE8LH2300449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21cb55e9b8a22a4e59b1de6ed6d6dfa7e2741cfc83f4232d020f1afc9a1b182. 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/BE8LH2300426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317f6ec16973d224b5113aeb7db53262df1c4de2caf4cb695d066086d4c253b5. 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/BE8LH2300440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ca68fa6d6772e00ac8cd631c8e3fef44b71e884f77c53d7ca11a9b2aeaf85b. 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/BE8LH2300397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2700464f8bb15823c964c6f612111014fc7004e983a77d4645a91f4e6a8b8bb8. 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/BE8LH2300346.
Like You Used To Do (feat. Michael Hausted)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bfdbefc6261d43083f7d7e1c1e170fadf0d47427dc3de448d3b813c412c2fa9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BE8LH2300298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c2c1ae8aef252fd70af6ede41745ab10df019612fffac55deff0968758b9d3. 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/BE8LH2300285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4469f58e3c951d7a494e7184c836c8a60bb5a092622fc1284d5352c7a4a0a2f5. 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/BE8LH2300209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755e84e92e5d27bfb52866dc4f499fd54e95e1749f3775a94c42b1b1210be29d. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/BE8LH2300165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6597ee5fd0816f6e21188821a29280426a383e5c700596dcf8290c52314f612e. 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/BE8LH2300106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c8a42ec177a7ebccc950f90e7f8cb48d58156ffe5c2fdfb87d63de8baa4ba1. 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/BE8LH2300079.