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 0x0f45f8d0612acff6c12c4dfed55bf450a6eff3587582a79354f6c812361d5d95. 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/0aa6ef01-7fa6-406a-9e72-50acf2607d75.json and https://artists.proofprofile.net/proofs/artist/0aa6ef01-7fa6-406a-9e72-50acf2607d75.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 0xc3fe90968ae34f770940a6f50178887563958f60e5c53e816e66d89fc07eaae6. 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/GBKQU2304795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a6f3173e5c714618d28d4353b9e3fb1c5ec7167459a08a2aa65f663ebeb1ae. 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/GBKQU2304796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2d7858ba6b75243177869814f9634543c40efead7a0cf837bf3d080a136520. 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/GBKQU2304797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a02e4290183fdb8679f1ae8a1c1a7f9b702e392ecf210db7d581ac06dc11e6. 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/GBKQU2304798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d451bdb4c2328060be36e6efee0332b3712173d1b81dd7e70a026944f0d3dd. 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/GBKQU2304799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4db2d2e01a0eae6bae23facce2229efa7dd01128c62cba8edd03399505d2f3c. 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/GBKQU2304800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c849db30f899a729f71a598e51ac5c6058113f6cd6a2d13ad045dd6a3ea75b. 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/GBKQU2304801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacbc9b55a4add24da784043774681a04cadcd3a1edf512abc645c7f4763e1b59. 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/GBKQU2304802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406980ba325e4be9a1f8f727607d228ad7116058e005c9e98a229184e16d94c9. 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/GBLV62207437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa1fbd06138b27211b06ca0cbe264f5de7b6c40b685b1aaf23de2e96965708cd. 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/UKZGC2307390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00513ec3b553a4429d004481c08ec679f14379ab69c13ebcc4c3eba3a9ce1cd4. 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/UKZGC2307383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe704a5c3a246e4c60af4c1539ba921f67657340a87276f1f397d33f7a11d1772. 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/USANG2431990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9361371ef5d1020d63b361b7814a9c57aeb9b9c410cf67c04b2dd9466abc807c. 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/DEH742431749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x269d39901f170247be0fa8cf2c0614b0f5fdba8a04990a9051be5eae6e644cc0. 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/UKZGC2301548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf3cfc01b3a3fca8b9dd4bf2d6500364aa16b7ae8032af2a684c9439372cebec. 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/GBKQU2290693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b1b0992411466aa422981e496ef5707729bbd83a27f6b6b23d1351a69dcf30. 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/GBKQU2290699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea32d4ecfdba6bcb0881bcd17be8a6492a1edd33313c131e6e2fd6b2051986d. 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/GBLV62204908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed89629c362764ed7fdb88b421df1156fa9baf8196c8a5afacd81df262dadee. 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/GBLV62122966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc658fe9d7ef5ebbd7c26b1b3efa600cc81dae63d9cd42362514fe722a83ddb. 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/GBLV62122970.