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 0x62e3c6578c25886dedffe1f87adba2c367d9c12d55f4be32eb9c2b8c488534b0. 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/b999b66f-f9bf-4a27-8ace-3891b09acf54.json and https://artists.proofprofile.net/proofs/artist/b999b66f-f9bf-4a27-8ace-3891b09acf54.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 0x4e469092f4292ffae644dbab911ee3a2ecb523ebb5444ea5292337cf7cc5ccdc. 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/PLA460501101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb1b80617a8d572b97b5b32ec074023c3f649e67d15e6f98e7755e61d74dbffa. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/PLA460501102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb47f1c366ac7991add28f98e5b758c4673d6fb0d06ce663b9c26959dbda3e9. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/PLA460501104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08bec0501bc0c848e521c93e915ea8c08b731d53929585ae121c189510d61131. 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/PLA460501105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc01ee418e92dbd3e00c3e47e5fcfae163bf0eaac82c3a26379acc7dd73b447. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PLA460501106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6529c459b5976a17fc868bc0386dfe3f5f253766ff504376d6ecdcbc4663b606. 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/PLA460501108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f21e1bd656a7ddbe2eda287b6ded574b778796039aa45945719b4c6a0c8cb0c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/PLA460501109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba146d65716e72d25043b1bd2ccd2d3453cc48c8284b33a9a2ff90647c5f1a61. 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/PLA460501110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x464e293e6f690f313f6f82f38f7a50cab4d490da96ae5f12488dc264359d6600. 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/PLA460501112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44597d12ed34634d665093488a2dc4403cd73de3e92204c353677c1896c2f724. 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/PLA460501115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd9276069bedecf3253c482bc2a506923b40c543a81c0a28df83e21110096fe. 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/PLA460501117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3602e25cdbaeb87b6b25ac90ee7744e976e3c37197b5d5c6dd7de9670d3fe39a. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/PLA460501103.
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 0x25982bb4aa0bb3266bc40ff0b0c186d1f4226f5c025d550ba0d38ea891052691. 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/PLA460501107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617778f66813ef8f440ec7fb0394baa6bde56493ac9e7a15a3e42d144b9c5b6a. 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/PLA460501111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3a76e23a6fab657160df893b99a6497615af1f73e573a153e7d50644f8c441. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/PLA460501113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd5eee00556880a4f0f7ed83c9bd6a36105a13621fb216e972ffa7a178ed7e2. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/PLA460501114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a9cb0fa140b28f66124a07159276a052f82b5550e775f3f30fb61c8a6e908f. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/PLA460501116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9b363693e2078b5b1daf4578527cdd960e12aab572f3a1c1ab2f59c0a5c530. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/PLA460501118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe73dea096287c8035302120250250e6889218f417e9bd3abb5e05ee576072336. 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/PLD111800039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ee1ed2372b2c8db87159785c013cfabae4b6c47644c651e3a132ea7b8b8917. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLD111800040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006eb8bde103558f15eab0cff8c19a0a4963ef7fbbe721acb7b74161565377b4. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/PLD111800041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc58ada10c6f7a5cc510c0529705c8e23fd2a376f1d088ae77198d9bdf4c52cc. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/PLD111800042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0febbf5ac672b2ce0ef85228ba11e3cd3deab1ac3621c675836629394d1ca77. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/PLD111800044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7a1aa109e179b4b3b8b21b3cea51c0fd90c75b907bb1fa1df45f86e37088e8. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:51:02Z), 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/PLD111800045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ddc6c06f5837d49149de3d086eec06a39bb308822d57707c7d8bcdf2678e32. 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/PLD111800046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84ba978725c1b77dc666a1649d3bac56e480bb9b0efeaa0bf1592812722cf1a. 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/PLD111800047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3023830e21c0b83ed8ccd2a864105008cdfbdbce0f49dc9bbade633694125561. 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/PLD111800048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe89051bb2d087e291b195b34df5b635168de16f0c9d032886b39599a1158baf9. 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/PLD111800049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00417bbdadcba41a4e87cf88872dce368ddc30ba57cd4be27f91a93af281d6ab. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/PLD111800050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ace1be4740716117cfdba9cd94e8180bcb599d96ac32ef7bf7178bee33af25. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/PLD111800051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacbf9c5f1e978ac348e9138ec99960b901420649d5f971bb4b73d67104549767. 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/PLD111800053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2edf51150322f3e108002182ca6cda701b1424d8f186da63bcd9707fd126512e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/PLD111800055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f0c09b7e46a0360537f961615389e647afcc33c0bbfedce41dd4c0f44286a5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/PLD111100035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbdf70928662945d9e57e638fccd821fe0fe5e9111e22380b7de5f3b3feef685. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/PLI367533160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91263f46ed1d3d8a31e5e13c605358c11f8e632b5e92de3bf4ce1294b527b55a. 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/PLD111700024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2978d5ebe18527e8fff3466ecf605e90dfe168a7f953c3124e348647e1e808c9. 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/PLD111700032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc764083aa1a6891c0951fe04f1996fd1e5bfbf3f6b9e080ee65e5132a63933aa. 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/PLA460501304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91263f46ed1d3d8a31e5e13c605358c11f8e632b5e92de3bf4ce1294b527b55a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PLD111700024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5c2c6da4e379baf7c0bc6335db5f95e8807b82c551bc1f1963ea440646a1de. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/PLD111400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916f7b4cd6366637d7716285b7a5b5070964b6592ad0fbe9559cbff0860aa500. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/PLI367533190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6433d4934dd94383eaa053b8f3177c30178ba6200cb378cb64ec0e8bef7fef75. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/PLI368536380.