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 0xfdfebf7b436e98b6e27aa3220f3c7699590c82244c98122d6a2ed0fca744b4b0. 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/5e4cfe72-e977-4ef1-8ff9-08ee43a6efaf.json and https://artists.proofprofile.net/proofs/artist/5e4cfe72-e977-4ef1-8ff9-08ee43a6efaf.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 0x2c206ef9c6a84e418f73c323e84670f6abdef2b749b6c3ade1041fe91d4f35e2. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/QZDA81814648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34bb8132cce01e45e9fdd81797f7c12c59b12eca0cd2fb5d0963e809e36758ff. Chain 2 (Bitcoin): anchored in block 957676 (2026-07-12T08:20:25Z), 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/QZDA81814650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29485fa6730fd4b9e6b5d1bd52a7059d4b22b1be01631ecad14084551e57b8df. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZDA81814652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99910a01b86feb391d1f3b1c8fa47cdb7196d16acfbce929366df18f265db7b7. 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/QZES81896156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0826c9438a571528f9c9fce517ab5e36fb6276a0963b958625a16ad4f173d71. 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/QZES81896157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc52d1df813c8a9d9ef842c933f5d6ce5e5f53c1558e6bb0f9d4061f76ea9dd7. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZES81896158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38da03a4453bc749096de69ba23532a3c414cf4e2ef95a1d5ec61fdce7a3b87c. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZES81896160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x032a4834c7201e8ace8f396cd4258d4e0e6163a45af4ff396744d27a337631fd. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZES81896164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd466fec48a25f7d9e55ddea6135a9dcac7d5f0a3dbed8a72c121d647e3b4c0fc. 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/QZES71970411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7d5378dfb1c25968ddf4d2ad082ab4f5af8ac2649bcc98904df9ddde1c6e73. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZES71970421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2abce9fc93992b4c6dd0bba74a2d038e53056c50c8dbca723cc2497203dcc27c. 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/QZHN72052807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560fcf7ecabf70f8e5cc1faae8038385cd63bbfc58091787b185cf3c20392c5b. 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/QZHN72052808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5450f6c4396447019d1642beb380df329b0dc018941856519d81fc19886f7f4. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:51:35Z), 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/QZHN72052810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b2526b37d07e989e94cd57bade95b37dd5ad6f396aef337fa9efc708e67109. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/QZHN72052811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd6f2c0bd2cc8ebae46dc71020708ab11b406f2596838099d104ebe8752b27d. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZFZ72268094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5697c8815a0d4dcb4db10407c7150dc51fd62a8557199d652a6146138d705e7. 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/QZDA62599844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa933ed694a5958c5583e596fd7e2946c4a12a803c608793e3753bfe4f7a16fe1. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZDA62599845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553cb286c8d15c72e736b304b5da956e4c0300bb48b7997395c833c6684c6c88. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:20:53Z), 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/QZDA62599846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbce901d1e362aa06eb675a2ff642b598d9867ad0629d492d52ac8a822af30da. 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/QZDA62599847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab11a04d4bbb7ae7ea0d363afafa2d3361a4662925e49a8dfbe80c011bd43818. 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/QZTB22465764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8152f3ffe5fcd92561730530731a4b036be30a36924b39eee973a4c8cc405ba. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:36:59Z), 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/QZDA62599848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e8b1dc36a62de95eae879cdfd27db51bf55c6a15e577c08884867bd9e55c2d0. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/QZDA62599849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab6f84ff7fbba4265c93146a7ac25a306451dbe47b875a901b474b28ae59c2a. 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/QZDA62599850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc91d2d3783c891705ea999265000690787a89c753ca00e5d3d1d096149e660. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZDA62599852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776ec106a63dc5849acce94d25186b48a4ee550e2582a3a5198e4e655241bd2a. 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/QZDA62599853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6437a6e86e9440be98f6360a93f68d9056665fc854c34e6c1bd90456b632a3aa. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:22:59Z), 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/QZDA62599854.