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 0x6c5e9a4df8fa853d76c2dc36a8c1605e5194501c95e7397cc674ba3300cb500a. 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/18cdfe27-d645-4360-8430-0df16c87201e.json and https://artists.proofprofile.net/proofs/artist/18cdfe27-d645-4360-8430-0df16c87201e.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 0xf6705a06ef4fd84f9dbe3053706f2bc1bc30eb914e7c1faa472ec53c902654e8. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/BXPBE1500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6706f0dc63b8df7ad69d0c0c88e77bf973972e5ad89828a53967f038b898a9ae. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/BXPBE1500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c1dad08f81aec5f0b772145f5c578e7e22b22b6daa9038eed47791ce627a01. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/BXPBE1500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc571df6f2b7b9af506d278c03cec17a9ca464dcc44d54f36f4333b8d8f12c99. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/BXPBE1500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7753e1cc2ade0adc60ad01821265520b05ae19d25894886dc4f8d3ef8898cdc6. Chain 2 (Bitcoin): anchored in block 958724 (2026-07-19T11:19:01Z), 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/BXPBE1500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2b02f9f68cb4c30536410ddf60a74ea850d8f4a08dfcbad661c1671141c4b3. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BXPBE1500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b14238286a47c1cf55f254d11ad27d65569872df2893840792639700b36201. 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/BXPBE2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22300ce5dd45147506da81ed8283cb7543f7060b99b6d366ac4cdbdba72385ef. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/BXPBE2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f02ec4be22b23b210e8ef713a379ef0a3f21f3cfe58caf9dca7543e3cda2c57. 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/BXPBE2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd976ee8eee0b0971b6fcae1658715b9cb6cdf9ebd339dac61a170bbb1dade15e. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/BXPBE2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c4de549bb931c29d3ce9b5147436c71bd36ebf7a32475772963b854a3b7621. 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/BXPBE2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc94b5dc4f297a71cb1ba315194931d49f036f4c3d29a0ee9d663007d5969a821. 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/BXPBE2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c8740dd54ef1aac60cf3f75e8c22c5d6982999883466a9c77f2c69b2aa054fb. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BXPBE2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x989f60e08e1803f303226ac3434478fbe0540ab672b470cbb04acc4cba664cac. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BXPBE2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452d1831c3adf1cf7d1514a244a96f2eb4c01d14a5ecf71c7aa613d1da6362c8. 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/BXPBE2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2a21691d5fa9ec85dadea786997343666551d1acfd87b73998af5c8e95acc7b. 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/BXPBE2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd078ebd69d5050f5ad5faa2d514bcdd0fb5e27b224b9fe2e4d14af249efc35d. 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/BXPBE2300012.