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 0xf0757b6b4ecc568840080894be5c992f858488693fc41d24d0d6409736c21f4f. Chain 2 (Bitcoin): anchored in block 953687 (2026-06-14T20:19:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/68b65712-6ad3-4835-ab7d-7c1c944fbd69.json and https://artists.proofprofile.net/proofs/artist/68b65712-6ad3-4835-ab7d-7c1c944fbd69.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 0xa8ea501b9a8248b83e0e0268252d5a24ec10d9fd80e7f2e33ad5261594c5a4a1. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZHN42547165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b842a58f66817aea1a817dc460fa6d01b80db0cfe2bc4f699ec45ed173a6d6. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZHNC2599491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44fec64665e9cdf18906e0ff3c0429b78ca6abbdd91e9f15a56f6f01db4bcb3a. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:44:59Z), 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/QZK6M2586934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb54c38fb826d8ca51e5ce18bd3b7ee51f67a45a58a8dd8e1b3026d687c435258. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZK6J2584146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9929c471a95c0cbe307c78adf90fc6ff7b12b899fcc54920404e9dc9204252c7. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:59:34Z), 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/QZK6J2584147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ea501b9a8248b83e0e0268252d5a24ec10d9fd80e7f2e33ad5261594c5a4a1. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:27:04Z), 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/QZHN42547165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae84231804fd774a98fc0238a4b992b71ad68d02c4ddf0b3f54ed106178694ef. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:03:50Z), 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/QZK6J2584148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b842a58f66817aea1a817dc460fa6d01b80db0cfe2bc4f699ec45ed173a6d6. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:05:39Z), 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/QZHNC2599491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071057ae63c5e528f7614b5b3e72df29405273486bf675d9f9a4b4b2e766960b. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/QZK6J2584150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ca7665e87dfe746c90e88ede141a425f8dbc52169293672ad2ff5b6108a0e9. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZTAZ2571290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c163b2b397bab49e1b2abdfe4d1897f8c1716cd5a1ed0ce530876929dd6fbec. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTAZ2571291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x229d7620be8a60df65fdcc81a60720099284f417ef4063bfe206d8fc3f634159. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:49:37Z), 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/QZTAZ2571292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e5d127c58c721c1898fd701b0446e6c412e91e3dbc1db7af6139cdc8b85da0e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTAZ2571293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f9b29ea2a57f7277b246499bee87a957437ef808a5a4e2f8602399a87bff47b. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTAZ2571294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a5c0fbf92a201b06d4331f9f41aeeafab037b1cf64207ce0cfcfd518f4c50b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTAZ2571295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea733e25d195921d8efc777f2e1c4aa6bbe5d7d959624c699901304b847d02f7. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:53:38Z), 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/QZTAZ2571296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57db486a4590b31b126905fd97df08057dbb7e3511e6f6fa385627c2c74e64cf. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:51:49Z), 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/QZTAZ2571297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6599a97e9395c4f3d6245fcea00f5a100d0dd4cd3ed260280c389a1c064d5179. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:55:01Z), 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/QZTAZ2571298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168b0fc9f5ad4dce2dc789015feb3de920e7aa93ca7def9ea36f8bb1db39cd2b. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZTAZ2571299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbbaab29b894d6e80bbedea8412c69734e8f2bcd4bc1606ad638b76c832e13e0. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZTAY2510854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f566bf430e0e40a8649172d140314c1c83102a59075a09766ce9d966fa02745. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTB22594028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69656ee51adbe8bdbbb34d98ae69af91768e6f902abb9afa408682c1d925780d. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ782563127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca0afbcf9ebe543dff244f7e2025e43b529fb862eefcadab1006c620e9f03f3. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZZ782563128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a03e3bca3b27b83b95f25ab6d101262c724863ee223ac99971a438748a4fa26. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QT3F62569657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93546170421e7eda8870aeccffcdc01aee41aebfb837e1af1f191a73597a8a02. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QT3F62573218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9272a17bb2406bf53381ebf2113132b80fc7d5ec91700ccc879bc314b2d941. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QT6E72504032.