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 0x3f112e037a12fc24a779963d5b72ac79b322458a5b3ad8b0388447e9b0c234b1. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e63ba405-3525-49c4-9fa6-8d642d7c03e8.json and https://artists.proofprofile.net/proofs/artist/e63ba405-3525-49c4-9fa6-8d642d7c03e8.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 0x6d28f064165fbe39a9802e1abdc2473e4c38ef1f5c1703e5d791c241551a1eb9. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/ARF050800115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9685d11b3a8e7acde80b5a9212c904c4a7121d5e08bd0c1ac597af23aedb592e. 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/ARF050800116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf05aa967b7326f913cb08b1f15f986f94cf57dff3851c076b9333b75d2ce120. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/ARF059800019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9ffd9d0512f0f8f1880e3f677a14b6300633fcbc455b80c1863a67d912f5a0. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/ARF050800117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x885e9d3fb50ba5ff586c24b3163cb6c9b4ace087c875fcf490379ee36a79d0b6. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ARF050500127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8442c5ab9959ed52a7f67db57aac6dfce72e4c8bef1d800f3b45b9eead178640. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/ARF050400948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974b00d71f02bd5148153f36f8da4ea36aef95b0aa0fd9702b0429c8def0190a. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/ARF050500170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aef8cf12dc159c7ef6248d05e36f6b78286757859bb2f696b9b44f4006127b4. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/ARF050800118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e435efe8137b960267b2214435b44707062879fd9e9fb985d3ca0abcf305010. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/ARF050500367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b54093f46e5c501036a0b5137b6fbb72f249b95314d53c80dcfa6a4f0acb4d3. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/ARF050800060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e1b4dd66ecda6c9518f3149bc17e56813181fd35e1657cd3484047da001c3fa. 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/ARF050500570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8277106928c775c682f1584be24947136ee583c00e4ddd5658a97e8ca35115c8. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/ARF050400754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4d3459da6e678f7f355720894559f13bf8db2e898093fc31c05319fe9af92d. 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/ARF050500108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63899abb782706098133e19d103d23139ab01446366b42a25ae8d2f3a6d88a39. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/ARF050800119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17168fd9543712671a4d0ebf1bb46936b9112894e256531b69b061cb5dea25d4. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/ARF050500096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a0c796b73a4d6ee0d2d1fac3c2af83c51b6a084c2f81b6113d926d7bf1f960. 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/ARF050500148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf89c66f3581f282ac30ce6594b0038c2acf10501d7e7d195e40646a2416a482b. 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/ARF050400949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b6996e9d998fb0c1ab6883be2fc024559596ba6694c7965d57534ed2404b00. 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/ARF050500345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc265f080f3664d934580fbb989397963a059ebed3e48eb8033a36c5e5d4c40de. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ARF050800091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee9ebdddc2364b1ca22e5f1a6e0c5a83f337e3da9f56357f5d840c1c78dd65e. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ARF050500111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e3fec8b507579a492425243ac75158568d180ac81b117c2d5bd8c673a4cb491. 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/ARF050800044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4017ab5e62bdd288217a7bb82fb2f8c0fa139461f38bce6c245b44365bd1057. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/ARF050800122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d59615c803d7afc277b62dc5dd36c2e21b1b4419776d7f5dc02cbc2cd41133f. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/ARF050800120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7da57638431cc5df55c257bd60b20e9a73d9d1859ba85b44d85b55fac19cbb. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/ARF050800123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab21bb06fd42d6ed3697ee10a622878a82f5f2533bca96d1a5e4656f7d56e84. 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/ARF050500095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5879dedc1a95495b95ef0c51ba3ade24246b209b24a56283578b3900254c0dc6. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ARF050401331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee07a477d02ecbb58d24eda648b55488f1fd3bcb345e6c205447d9773528439. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ARF059600020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe866548445ed04d5d9881b87127d7e0d687d871ed0f2488af4f31f9ba5a67e91. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/ARB981000004.