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 0xd8efd510501e149bc5f5645f4fd35ef1f182ccfa309190bf2a3de3cb7501ed09. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ec7b350c-d266-45d6-b54e-2fca18a491da.json and https://artists.proofprofile.net/proofs/artist/ec7b350c-d266-45d6-b54e-2fca18a491da.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 0xbed056c5e3039e74d40287fdc29aa980794b89d643381302d786530923736cd5. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T13:14:47Z), 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/QZL382586946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d2cd01fbdcce23337c4ae66cd235b488e410232f22e686db87211d4bd8f2e3. 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/QZMEV2507473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff8e20ab0317baa0773edeca89dc25523ede7ac0c629be9e542f0fc700e2417. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZMEV2507474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb95540a13b4f3bbe9d8168ddf0ab4a4f7877461cadf38f6d0e75859ed622723. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZMEV2507475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1397f81e0d0763f36200a646688b7a2e2acb3da280c58604e90951f9d1c93564. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QZMEV2557372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa88f972ac80928084cd238ec71abda26f420ffec83739d27cc50cb4c09efa981. 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/QZMEV2557373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3b95b2a19086134dd79fb81234827cf480e54cdf1dbb7cb6367d8056e4e630. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZMEV2557374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572b9dd73fa15095b817e36043ffe297f2b0ba6f3cfd0c2b9560d50c4a09f108. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QZMEV2557375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079fa488224dc53555587bcbeaa4a7ec22549ef2cb965d36d3fa1d02b096f83b. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZMEV2557377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eadc981a4335f3a127c8799afe387c9b617983dd3a40f71842648c52837cd43. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-20T00:22:36Z), 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/QZMEV2550868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c59ce618a68a715a8558b8caab74d8bbf196aa673405be87d85bc13b3f04d8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZMEV2550869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c6d7958fb4b6cc1e463e3f25902d780838311fc4d80fb34a63e8a972155b25. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:39:41Z), 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/QZMEV2550870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c246dc73109578f3c75f2970b8e03ed50e5fc01edb20b1859cf4f9d62ee72f4. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/QZMEV2550871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b520854ac22dc1775a71062e0c2f55981e10d5f2c1010e661381781e64355b. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZNB82502693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9697418ea46833cd9b87a3457b5aa9ebb643e9d828d890e36947c47238842922. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZNB82502694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x023a60905175970251ae3bdcc70e4f7d525be5ca7b00f1e3e66ddf0738ba50ca. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:45:47Z), 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/QZNB82502695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f59795cf1cd9385698eba9b472fbafaf6750bb48b96366175c5c766e9be27e3. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNB82502696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a39778203bbe63ffe2f2ca182cd8a67a7f4abe48f7ca26aeb334426342f7fc. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZNB82502697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1e5069465c9a6152b8ea5b4685f283f9145ffc8de79f64a83b61d9d43920ad. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZNB82508116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9044fd93c5ec3923b38fb18b52b4b83b9d5d11c0490c25fd53b4b77a60d983d8. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNB82508117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf22e3d7bb246357f8057f72759ea281a5dc940e445c6f1a19740bdd7f4f37af0. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNB82508118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef54c440f557fde317f6b6051216271bd0c4fd8951cd4d4c4a8c17597e5f9f9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNB82508119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe7c404702e7122a3267e985cbf58d676ab88ebdb5623f38d0784d8b49ff647. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QZNB82508120.