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 0xe8392253e40efd23b075de8ff9308f7e8a7e589b39fbc8782186cd5a54979c9c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/796e6a38-8891-421c-9c47-b45da63952fb.json and https://artists.proofprofile.net/proofs/artist/796e6a38-8891-421c-9c47-b45da63952fb.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 0xaf5d5e25064fc978473028d454e43576269c55b981135cbc576cdace5ec8133e. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:21:32Z), 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/DEPI82009380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4128e121d8e27edbc25f13cd649673d248ac967bfef5618f349d8e2d40592d62. 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/DEPI82008606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc19819a0507e1898e8d3f6305bcecaffe81e61adacd1eff974e27e68e3bdf4f. 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/DEPI82014320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28160fb1dd888c4f2ad3fe3ded6bc684f3b9378c4827b63e201ac5a40793a0d0. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/DETM41610787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9765e674527c40c3dee11c088fb300a8b3b95e5ce71c2e63949e49c56cdf1e00. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/DETM41610797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb46783f18174de0e72ab8b7fb94d32c8218c41797ad11ed29a53fc71194e217. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/DETM41610801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6504d557af896993b2a86ed24a636e2aec16d1739673e799dfe71320767baf1. 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/DETM41610947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5fe38316da26785e726ce5d648c82405a20160b14458d22bad71e4975c4ab6. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:59:37Z), 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/DETM41610951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9843555a39aca75f24a2d2a9cba27036721e1d50861a5bb72c6f2483b14754a. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/DETM41610952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309f59f17e239bd5ba7aaca4638c79cbddf2f9429e36a1f7a1ec1a5ce040a45a. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T19:24:28Z), 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/DETM41610799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb46783f18174de0e72ab8b7fb94d32c8218c41797ad11ed29a53fc71194e217. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/DETM41610801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99fb4203b283eb8f198fc3b98cc8b052aaf6e32a41f36a91e97e9aa934b4408e. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:17:55Z), 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/DETM41610802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a329e6f967c5f41b8436d9bc1fce52654df86da38e325fa50d55f373b33942b. 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/DETM41611051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ddb625d05a683a8fba497c8d544221f4e9e0d69e9ab4a6b699706752cc91e4. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/DETM41611104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e4e3e88e316ca4f1f1223ab09c9d5dc508ff1c248a636bbbd71057a5bd9c60. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T17:28:24Z), 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/DETM41611278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e9c5975f481130469e410cc549d6a0dc82306c9ec4299e669eead08151e77d. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:33:13Z), 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/DETM41611280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ddc756ca1753d6648aa5133824ef0b18ad23ee147f0c54d2ce05c7a70ef4be. 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/CH7812237905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d0d7d549bd407951516d80919c9edb20d49653303af20a72cefff3cde5cab4. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QZDA72375603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd365800776864b01b8263cbf046ce15d772a2d12ce863ca62ed2fccb3b864e79. 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/QZES52301046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df34b7f080c169489aed21036081893cd9400c6ab4722bcdaa502381c1df393. 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/QZHN32312812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22721a90bd7c2920adf5323682a4acdd8afca42c4fafc741f1b9b3fe52bfe943. 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/QZMEP2335781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7c4642ae0e22ac154c005b4e83e98c954af3e8e5f05e64676d71544e5a6670. 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/QZMEQ2366461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6862c16c8caeecd28a11a81147a0f654c2ba9d8a5f030f152c1dee0427f4336. 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/QZK6F2510784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74344143a9879a8c3d0d8526f6ec5490b6abe08be7c30d5671a8ed5732a618b2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEQ022119918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7554a093d465f6fb36dd50779a1a67ae9a1ac7972bbc46a387bf49a7913ba15f. 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/DELJ82088317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c0cd9b63e4c3812b704d52edff3faf6b1f45405d1942f67f93c410467acbbb. 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/QZFZ71985663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64b0359781ef2578fa7f730c2481be935e41df58eab9f8004a3af5d9be64032. 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/QZMEQ2354549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a112b8e22b37e022e22efd2bdd021b2cb66df053744d3bc95e1822ed8c83efc. 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/DEW922301831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d39324673425ced0a052dde83d1cf704574a9a464503f5ede818b531ff17a8. 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/QZFZ61938708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec9a2398cb1be96293ccbf0ead98f7e4a6b785d93bc8d7e95010c25d79f0718. 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/DEQ022280921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc48516e1020fe99300dd3d652749a327d4336749de7e882beea15af2b0bff26f. 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/CH7812344625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a151d4201fd80693d03d2b7d66e9d6d60b7b53743d30a0c2932cd5d250c3de. 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/CH7812230794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ddc756ca1753d6648aa5133824ef0b18ad23ee147f0c54d2ce05c7a70ef4be. 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/CH7812237905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1af01ea6f3454e527ce9867bbc087df1ee4483d6a67357920b7d041fbfabc8. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CH7812236342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74344143a9879a8c3d0d8526f6ec5490b6abe08be7c30d5671a8ed5732a618b2. 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/DEQ022119918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51d2d6283196e675b4ba9284d352617f31f00cb8fdf1f03e9c5babb586be9106. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DECE72107713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd15d89f94f721c944daf3b1d7b0345cb127afd5635e9182aa0b2c161a1bdb4. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/DELJ82088806.
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 0x2dc99b83c5eb7332194ff06daf24fe40ca7007cd06139bea21b185ae10ed027d. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/QZFYX2234061.