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 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 0xbdf262ea56c119ec20ec49e6829d0fcd5ba04903fe35d055ab941bb322b46f49. 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/50b35825-ac3b-42a2-8b7a-71e25cc02139.json and https://artists.proofprofile.net/proofs/artist/50b35825-ac3b-42a2-8b7a-71e25cc02139.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 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 0xf77a54be397f47236b51efd34ed5e5667ee1354ee7153585742052bb54ceb9ab. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), 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/TCAFL2173678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2348f1dd52c2b77ad3e0ad05a5f733d02722a0e527f57f71c4f4b95f0bd66b77. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZHNA2349150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea5efe3d66e2d055eebdc0e39de4d44d0cd3f5680e18e0afb158c0216da7bb8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHNA2348174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9757e939936cd2dd95d1a7dcdae6483661f4a3620be549b3c49f149486dfa71. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZK6N2357680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a5ad8ae237c6122e57db42d36b95d90453732d00ec8e512c6b17265c5cdcd5. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QZK6K2371440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dcb7b7d804cafc87acd116ac7f01eab062950b37769b39296071fba45f42119. 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/QZK6M2324959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e2c29ec7dcf8be0f7b1f3312f447026ff38d6a5239f131586dec5ff4efb9a8. 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/QZNWX2351946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x795d6309a0cfe75bb69b159bfc21a3cb6ac9c6c91c141a1a8e2dd0f5d820638b. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZPLS2380485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a7a4398b9f925947a0fabe34780fc409064ad8cce9cba139d63811815dd3a5. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZS7J2311430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c58de900d7480c74d304c5e68550b7b828ee1e472604217a9b284ef9cd9a87. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/QZTB32381028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfccf05e78f99f7b3b78b427f31c1b28cf9d25127c200ec4706430c304ece4d9d. 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/QZS7J2389924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164d83df7c83c496a77a2965528ddf024393448b97de28b81af5f2a126a03482. 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/QZRP52395304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x045840d148857e95bc079b5504a99989e56bce83cc340eef127c25ee99cbe8a9. 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/QZTAU2384467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e8b8d8ed378660ae01860e1e8aaf988103c74c74cc103f04c02e730a8fda0c1. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZFYZ2408590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24871071fae3f8bab62e6fa302ea2ef3437949d6ce4315679a8d1e35257b1ec8. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZDA62401127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaddf95bbf2dca0e5e0fcdc1268930005f0898b81f9e72beb11961094654d4ae6. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZES72499511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f70c5fa6eecc832b1d014739913126266f847d29ab5d575019a82fa11c99670. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZHN92471072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c625b7f95f761bfc610304a2d224c428bf6c8dc16be37d0ab1a3dc6143f209. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZQAY2434126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae7155b653525a79631f1f5675630d59ccaf2e7b027eaea87e172607bc06b60. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QZK6G2410838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5451984e45a3543cd94aaa14d40a8b25470424fb1f28d00a643944574acf3db3. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZNWX2406080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3985f0607110a4188e64ab51758e9314ebdc61309d8229bc60670416df09375b. 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/QZRP42486250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f38c1ee4d7263b9917390a5ed83480c14aa16bc62433f714000dd415ff12743. 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/QZTB92409018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a442cdff49c95153dae1476b7fb6e3061438b0b68c6536c43cee91b9a4c4a1. 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/QZTBC2409409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0800ade6e0790ee5f3cee439792986b26591fafa103b4709107bf5b54dfb1dc4. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/QZTB92421339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf543ceaea111ef84fabe058296bd9b04da587ef35ac9dac50b1c118a7fcf28. 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/QZTB92422688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a972baa1bac8ad047857246790f2d10e030011a349bf4e1311067165fd66c2. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZTB92481399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1e59a27f709c8de699f6b4a6bdf359da30814122c9f752c4a12b2f0e19e67e. 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/QZTB92483320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47ca8cd907379028c9038b25d6febd5a82102041e841b37485d0615622738cd. 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/QZTB92483321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ec7e9d675f2650bd6518e37f7dcf17458fdf1810f2f9f796fd4076e18ea1d7. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZWFT2405231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7376c9069aa85260273a54a917e21a067f6906702c9927800345a9be6d20399c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZWFW2456666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0cfc32f2ecf2281f6820127b8de9b4a28f4cd441d41e68bd40da81b8ebaf91a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZZ7R2470659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0dc6736770b513a517e3943d475f439c51beb67133ee2a89e5cb207d6578733. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZTBC2453163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb09db1b81da326e760e86bf5e3e19e10ae8099223425d37217fd56b078d94f5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTBC2457504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c01c2dcb172bd210dd328643bd4cfb23ab7ebe2a48fb17789e79116e7b55d6. Chain 2 (Bitcoin): anchored in block 958124 (2026-07-15T08:13:46Z), 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/QZZ792448935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36386aea83dde189ce878f13b7bc40dc3743710c434eaebd4662969b6eb0a6e9. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QT3EY2489832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b22bbea9078d55bf0460cfccd7b5e9a96b1c927b55dc0c96bc1b258db74396a. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZMEM2522877.