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 0x9b0332663b08ca526b0ec63cb950e6882028e4a9f9999639bc7ad634fbdfe5c1. 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/0c61afac-a764-4ae9-bea8-8f0963d8230a.json and https://artists.proofprofile.net/proofs/artist/0c61afac-a764-4ae9-bea8-8f0963d8230a.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 0x4a6d2efae34dd7937c656cf29e49729b344ee07f89d62f53b88ab0599e8e0b0e. 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/US7VG1667706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41853d7adfe7fd33d3b206aaaca4b34b82726f7366c7d853c230b424bba448f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US7VG1667707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe441ac8588d0717f0ac497a2854d5b4170d3ab04f2b57b91e073e31cf53d137. 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/US7VG1667708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e161eeebc04268a7e6eeb890b961566b31594bb2716086626e10370488c21d3. 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/US7VG1667709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6088bcf7544c353cf240dfb52b62e7c8ebbc0ef420cb689de2a93d3f093692. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US7VG1667710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d0823923a4b5dd51d207be4d7d983cf2c54ba0dbfe5fbedbba6458a8bae50c2. 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/US7VG1667711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a15841db6f039a128d6b57e99fb67373caac9babc20334759ddefa8bd04363. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US7VG1667712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527fcb5b5fa1e411f0084d90c7ddcbbe67ab8e00167d7de29e8eae5d72855ff2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US7VG1667713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7930df311ab8470ce887c6b4a81adc0f84c668c263eae51e8bde0b4fe30fe1d7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US7VG1667714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46cb996955352b0c407b57719aee1c91e4663218f344eb8aa7aef6bd45d0a4a5. 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/US7VG1667715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e7b7290f88dbd949760d9dbb7d1f7b725cabe71eb2d094196ccd90decc97ed1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US7VG1667716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a6560c5ee21110d1f622073081412752426a8dc8a777f8faaddd358125d06f. 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/US7VG1667717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe62ae5e232f2cc4585da33ae1d0d3fe30644cb42d669d20998d291bc65e02224. 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/US7VG1667718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7295e7764936869a15b7b5119d5fe7c7bb69d3cec52cf47ba467039e38a2d0ac. 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/US7VG1667719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24f1487810c1ebfa865b5c06a39e4191fd6a15c8a9511d11e61b3942b9b7ecb5. 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/US7VG1689624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4489dc09950c905f14bafbb5541122fe92eae0d4c9965cba9ad67a1139d93a6. 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/US7VG1689627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c855aa95b37e022a9d950e30aedf86ec91990e6f8fb79293d6d802b80a0396. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZ5AB1716872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b2f8449f5598951d92f5413df727cba5a658171f193b0cdb3450a29bdfc56c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM4TW1674855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ed9f60b5050216ab091edfbf668897b35ee7d1fd06ac2f01da357af3053433. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZ5AB1833055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2064627100a06d8c3dd46215737990fe827086d83108d7b309b966691b8863. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZHZ52240922.
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