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 0x57b32d026ea1b794ccfd9893c77fe847d43de8b836cf9f342b9244daa5032590. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3ffe9dc3-875c-4fb2-a495-374943386694.json and https://artists.proofprofile.net/proofs/artist/3ffe9dc3-875c-4fb2-a495-374943386694.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 0x44ac6867651f8e7b41492d8900ca25ad5030633f1ee59420a94b7499b88ce3b7. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T14:11:53Z), 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/QZNWZ2172045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a7541d5ab0133bcd5508063c2af18df6cc3ab18fa400a629d645e5d6482458. 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/ES64E2200710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ba11356650eb9a3e9b69c0b694f95e4facae7ae820492ad22d917820000e12. 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/GX3Q92093231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd889b3bc3ce3027d60d705e29f6991cdb760f1659825faea6070edb389d97d. 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/ES64E2202981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde58a72fb0df4eb96e728bcea9b4c0249da3c03479f5970416adc1d739ac638. 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/QM4TW2281591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bcd60307e7f746832fd4b455de641117080b9add23e0c4cfac7782da047eab5. 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/QM4TX2212954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d68c74f0ed7ecf26542426792842b9396fbd81a0ea2704020f7d62967edbb0. 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/QZMER2288126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8c3732c20919ac3c06640ad0cf6d3c8271b44c7e561258fe2bcdeb0d5e96fe. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTB62228781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x982ae722ea5646355bdbd11db135873e5ff3cc1a6e09a281c40b84def114928e. 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/ES64E2300048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd244621980dc416ca5d9003399782137fa3e1241a9b2844fb75c74f22d1bc050. 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/ES64E2473647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x649578705578a5ae9c8f131af864c10c3ea879b6a20a4693185c562df4375a62. 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/ES64E2337356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890d28d12711e014284438b6b4275ee52e0e6c0b9240278fb2342a6cc1156df8. 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/ES64E2337361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda629b83565044e7de7c73884907e748f464a90fc2ee27409c6951096938f7bd. 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/ES64E2337362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3f6513c58acbaebbf178439409f3846d33cc285249939a8ad3680445eb462d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T14:13:51Z), 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/GX3Q92092592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8001cd2f745c2ef51114d9494a466160d26b6b3e91ed97ca7263bcc13e41a7. 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/ESA092224939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ffd97aaa1c4d4bf21ce4dc90311a9df18b96ff58c7390d1ee7c4f060a793b4. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:11:14Z), 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/ESA092320017.
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 0x271a1f8b80e50ea317ecdcfa3fdf22b6bde918a8be4d13f47ca867c2245acda2. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZMER2288130.