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 0x0a91e6983fea3f10bd7b461c844116c96b2a4932ffd685ee2e0171a085567a54. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d9ee4dd6-12e4-4152-8360-d5f8d2906238.json and https://artists.proofprofile.net/proofs/artist/d9ee4dd6-12e4-4152-8360-d5f8d2906238.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 0x5912bfc331ac8e4f2edfa69de94817dc70f6ec7d3924209d8f55bb40fd96752f. 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/DENM11300314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62eccc3dc0b1d4b419e47171ebb93e86a9fbe7eb068ffa9345c6fda8acef1d5e. 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/DENM11300315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc238b3c084c066dae979f89ee72ab520dc116182a02240c37dc7226caf8abf. 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/DENM11300316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87362d249275ad64f00375fe86426a323a7271783aa963b426d3f90c9f028e69. 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/DENM11300317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e940208ebfe3b196dec4c3a1d846d6ce87a6484a95680c26499c040f7cd9d25. 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/DENM12300138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b85afeb614caa85fedfcde56ec961efc55f2d183e46ec22389652057e041722. 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/DENM11300319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15abe85f058b5f8dbf71a69739466a364d01c6777872622e5c2987e91097258a. 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/DENM11300320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1abed3f2cc061a28c6a97928f5f5e34c1bc053a3918fcb48837dd220556de63. 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/DENM11300323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabdc40e4de429f65fcd32ccf797629de68d89bfa3150c132f4a4d7a412457a3d. 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/DENM11300324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd3ef83a215bf028948c02f6a5a213a9660d594e4e3d7d7878dc18330cb62e2f. 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/DENM12300139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41c7c1312a0032281edfb4915fdacaeb10ec97bf28a0d9255ef2220c2c2ebdb. 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/DENM11300326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89587eaf992e2bb94a1637e3747b75f6baeeb88da3183207945c555b251b4c60. 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/DENM11300327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe77eba906b8574b27447fa7dace66575070d8755f0beadc40860d74cedcedfb5. 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/DENM11300328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c520ad240bb21a5ba9e6d27321c896db056c53cf9443f0c9add5f63a8c873b0. 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/DENM11300329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9620c8ddfe8f7e05816c65a584807f5e88939db865acae67d48628bc8478982b. 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/DENM11300330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bfcd1547ba61f731e0aad8ca312f952f69649a14c5686f38cbd1a21cfc45d5f. 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/DENM11300331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76bfe4c01665a89a03ba8197acd7e3c0fddd612c1301cddd4353ac982fc61bf8. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/DENM11300332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4faa0e10968d4251a1d0868fd6062de1e9d1d20ad8dd102ff293db7d8701b111. 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/DENM11300333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50f899a73242699ab602cc9dd9a664e8258d51cd4a3663e71edeee74856b35f. 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/DENM11300334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d839bbd3d043fecb081121afca83f1e07361e4494ba61bcd19130561d98e66. 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/DENM11300335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91242bd67fc3abe0b58753660957bd49cd12d08acdcfb5d87b4d7e6e5e751bf. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/DENM11300321.
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 0xf8caf65cf654b677876bca3ea12fa32671977545e6063d8a6b28af45a3d3c820. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/DENM11300322.