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 0x617f8274d31c8af50a03141766c41cf9c9b084852454aeea80912b1a09e3ed59. 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/5e462d79-f2a6-4aa5-89ee-caad95b4d166.json and https://artists.proofprofile.net/proofs/artist/5e462d79-f2a6-4aa5-89ee-caad95b4d166.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 0x68990974bd6f699e087e7beb6c614e8662da63778af10c702d481aabbe544eb8. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/QZWFJ2397668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4dd1689b6499a173462604390c8b89db17525241bfc81201daef970346acc60. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZES62457494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996b1b84df843df0efc48e9e37bb49e614853b9cffb10ecce6a5a7ed514072ac. 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/QZES62457495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee8e2e0e9ddacc8883846a358985b096d71886f3cdb8804911f0a7545a4fa77. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZES62457496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db83c5f351d7f3abd6471e4bcc924db408857535ea86167b53b93cfaef842c6. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:35:24Z), 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/QZES62457497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd425f1fbcab71da68c58af23179d3ae5558f2b617ab9852aeefa200d4a4348. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:59:15Z), 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/QZES62457498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12572f7946fe99bf8db05f87d257cfe8b709c7579f5bf297f5045651bcfc8cc8. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZES62457499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0cc2809a187a5c47afc29ce70604467c27fb13c89adfa9888c8a64de16ae3f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZES62457501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1fc8fca649998d9fba969f837a76f128adf28c7a688523cf6e2d1a00cafe4b2. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:10:12Z), 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/QZES62457502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9d33472144fcd2c4c5cf94430f0b73e4bd45d7a97958d9f575d7c335425da3. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T03:20:10Z), 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/QZES62457505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4306a140f66c72234df255dc80a922824fc5cc8aaf9c00494a6d46b2b290a5af. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZDA52200681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686d97c35eb9aa8c6af6c8c9f7f340e7e9e87a3b30c1f7b92d8e808eb17465f3. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZDA52200682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b9f53d08a37b95b68cf4f16b3611219519168a92c227ce2564d620b18a31d6. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:03:53Z), 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/QZDA52200683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed944eec33720f55822a7024873e077a393c11a2567f45defec840a6456f04cf. 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/QZDA52200686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa03da0439c412372706e34d9ee9106e63a28f681488f7146ff78c4a7217f40. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZDA52200687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc8663d04b8295765bcab9e470d4fb77786c7fc1a5387c48bc7e36725e9bdac. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZDA52200688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4655736e8a800cee32ba697c5068f0cafbd7fcaa883d66b90487cd870f96e65c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZDA52200689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6341ba382263f5ec8b8877b675d7ec6a83109ad688667007121ad4f9cfcd0962. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:18:38Z), 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/QZDA52200690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15ae11fd956fc7ff65e2c9b89b65b99751fc4cce3e870e33f6c4aa6a6cf7c2d. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/QZDA52200691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d5bc91c0e7840a1e037483f675abbe33e0e5803cc98f64cd06ffbf78ed8772. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/QZDA52200692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbbce1efca51e875c81db52d044fbf84b5581b8690cfef560b52dad4d62a76a8. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZDA52200693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x879a406fbbc6bd76d58e2725ba83362cc6040313853c36b51ae746f4ef4f93c3. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZDA52200694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3bb232bd4196532bc6159aaaabf36c4597f58abe8cb4f02f75ae9d1c3e459d. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:48:36Z), 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/QZDA52200695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd57fc1aad81a7a469555b2b471d71db31d9b7de1102ce77064864f838d18e1cc. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZNWQ2418528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49f3a96aad39ac51ad438ce8a384bff85dc5bb19615c0e37a222d180c5824aa. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:36:54Z), 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/QZNWQ2439717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd3deb8b6be05db53d2adeb3ee5e6b0c19c631502f8058830451ba24e070f619. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:50:52Z), 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/QZNWQ2439718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3432bc70a164aa3e317d1cf75c1f2779a3134cdd875dac709f035915c9a3dce. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZNWQ2439719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe016a1a98035eb066c53785c8cc07c7a0017a90360395d1b8a52ad46f8deab9b. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QZNWQ2439720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cbc8ffc77fed3d88bbd921728ed699e50acd3d5f887c312d6009daea9844fe7. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZNWQ2439721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14664691f3107a16bedd9ae9e58d0925d7566d6dfa4ea73336f6a2d9cd946a82. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZNWQ2439722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7832e7db72074b00c5ba8ae694f3a73e5fa9ce68ea017e4f1f33871d2968a506. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNWQ2439723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7239120906bbd73f8c50f0237f7b7555ca5234a61ba5858bdbef19d8cae9b007. 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/QZNWQ2439724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb845e53c12f72a83ff7135e9f8f277a63c853300d002a6f5f6626d03ae8cc5a4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNWQ2439725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27435557c3294c753abc5c04754742aba2cc7eabf26444e6b2ed3ff61211ad4c. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QZNWQ2439726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2088f97a2efebb790e75282d06946a139664e0344efb96489e1f0fc771d30b1c. 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/QZNWQ2439728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556c09f6ce69a321e1e391e2f361527f603fe4e295294e8c87929513ae17843a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNWQ2439729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb3895d1c641b3312ef5b2ac565993e782368dc5f0e12fd7152a983d629f3baf. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/QZNWQ2439730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c80851dcc816dfb0ba577b7a2241c1fd3374a21681efe856544ff1b068f1e4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNWQ2439732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd57fc1aad81a7a469555b2b471d71db31d9b7de1102ce77064864f838d18e1cc. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:10:56Z), 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/QZNWQ2418528.