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 0xbfad64022fab671237321f7bd33fec1a152d0319ae821a1864504053dca3b092. 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/e91906a6-a1cf-4091-a38b-a96a8b249951.json and https://artists.proofprofile.net/proofs/artist/e91906a6-a1cf-4091-a38b-a96a8b249951.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 0xdf14e84c510f91e22d196cdd7f1295d9a35b5c1c3ea3503da529af0cb45b3acd. 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/TCADR1838669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d92296e55566982e99c16b2285a5abca7d5a1949d4525667042824fcff6cbec. 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/TCADR1838673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f993e123b18631987d785bf5de4384e02f942608e7a4beff435e8bd9b684d5. 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/TCADR1838679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d5de065a8032f9dc6f5dcd21bc99c18e04256f05587755fd83a178eef0e7150. 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/TCADR1838682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918f114569c77e9d7047dc7516425c21213925484ce341263c63d65f8bcb3a84. 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/TCADR1838758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e65d91efaf247ab25c14276ccabf8c8eb3d6f86113a8c64ec8b23934b36e95c. 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/TCADR1838760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x041d4fd0d0b7d386c3a3627e28101c656a0aa1744a95e143f37c9acca6607fc7. 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/TCADR1838764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a63cdfb664c7cd05f00b2adaab80ca7de529453aa133b51876891a142d3815b. 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/TCADR1838765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1caa1a7a9551dd783918ad4da526bddff59d151ca9d4e8ffdbae36593ed50ce. 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/TCADR1838768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c5366f9d33d49924e1676aeb802a2be587afa182cae7c5ee0a42ac6054d75e. 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/TCADR1838770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f6fc62100754e9437810615e3eaf13ec6fbd2c64bfe62f1728b2fd1816c665. 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/TCADR1838773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b416e12a4ba2412dd5c38bfd8e3f93033063545ca1c12ef662d7e345dd3133a. 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/TCADR1838775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43ce1e2996526d8008da89f0bbc1a7703af9ecb0a47c3dd243b6015ad1e2533. 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/TCADR1838777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb32236cffde0273c16640011d2c991e80beea703fefe3ebd4cede5bad08173. 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/TCADR1838778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76228fd5d3867c0a7b8f219ea88b63081fa990833fabb413247ad1584734b6b7. 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/TCADR1838779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c67976a59ac89d2ca9b308e9716c96be50bd9ae54708dc4a0a0181a71d4e652. 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/SKA011900021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7408b9f7958185900a51af7ebc29e4b32b72073faf7ccb1ffed3aada8c53d08b. 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/QZES61834937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed526afb7f710b0013492290348833b90934e16d598f735e67ef5ae32c27325. 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/QZDA41873022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2499bdf9b5997f044a7263645d011250e875b2850ced108793f91aa25d7e5e99. 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/QZ8LD1765587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d87545a3777488f0510c5c66fb7c822fb0760920796ceedc6ba940e9d17ce6. 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/QZK6N2011457.