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 0xa3a7ab55d6a355b6a958a6892c2f6c5cc13b2e64a63b187614d87385121884aa. 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/7c5f8846-128d-4fe2-be2a-a232f8c08e22.json and https://artists.proofprofile.net/proofs/artist/7c5f8846-128d-4fe2-be2a-a232f8c08e22.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 0x53d47fb9d760c52cddc9ea539741beed3ddd380210e31ccd7cd3568f7806e79a. 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/US39K1629602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd854f5e5f80ae7ddb340cd7086f43db4ad9eb1138cdd709a7fc334ec0879983d. 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/US39K1629603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83cbb40f99b1a0e6caea5fd2f886d39e1a4461e044dbc4d7885f5a446756abcc. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:45:06Z), 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/US39K1629605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc381cc5c6e5833caaa22152bd9c0775a865abe1d2f4dbc7b794440fe4452ae4f. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:42:50Z), 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/US39K1629607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a69c0a744cdb2221d82079f4bd914b58182fe675c2266e7f168c35e642b182a. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/QZDQH1828062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2706d26af953ec694dfc624b073b0c4425e1e23f8dbebb53a07bf8f6559d237. 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/QZDQH1828063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a191604d9ae6e7d4fe075667bbafb27f3a0eb65e811541f168106a5766ec4e. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZDQH1828007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2595079c2f3427a8d9b79914b1fd80d38cd5a54bf3ccf9dbfaec0c49b0ed9843. 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/QZDQH1828008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x882899cd8eeb5b3e336b755521883a8230e4227a3564bee5505bcc0ee995d250. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZDQH1828010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x228c245d238dd8fbb678930cbc96d55624e2af81d73758fa08b534f9a46f0e0d. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZDQH1828013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7049c9d8dd43a6df3413235a33f2a89c5db139c5bf6b44f57da8116ca9312ad9. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZDQH1828014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4a34a48e83fe17bddf6d7e2333d0892abd1134428a9ba490aa521aa1ddcf5a. 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/QZDQH1828016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f507518834aa9b6b4bf75e075158f0ca6af5ba5bdcfeb36cf1029412a82f8e0. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:41:03Z), 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/QZDQH1828017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0284de0aea9741dc854280e12a474cd31206eef290500b0d626d73104fd7b448. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:53:26Z), 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/QZDQH1828019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41d05c9df147afdb91246f1b2bd32dc5a1854ec45a2d60ef8c71e1a9b6ba59f. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:17:54Z), 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/QZDQH1828020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7e80ebebeb9e78b8d35f952041b42c1aa38e46be1da467445adcaf49f45fa0. 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/QZDQH1828022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eecf94c358c092f01fad7c3c2a79500533571771f39ddb184440e3b1b7b0b98. 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/QZDQH1828025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf204e53a9ecf5d17b656b8e532d17acb72ef931db2c482c35c1d62dff99a05e3. 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/QZDQH2204150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47705e6ea05857d3fb526a4705a185e735e09845582ec180c0695d3a89a67837. 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/QZDQH2204158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3584983bca2387ec1dcbdff8b4681a3cdb0d71be5f23150df303252030feaa24. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:21:13Z), 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/QZDQH2204162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d21093c5febe93f7ad8f546333d4bcf371d400f102cd1ef93789d5ee37b41f7. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/QZDQH2204163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ca57ba1f22d2aa9158c8df7381f51ca78ffe6da442f9e7f4bd417d3d43fdc9. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZDQH2204166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f3ebc6114a0440d9b6290452a3472ec16a4c91c4240c28d30cdf4a988af50d. 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/QZDQH2204167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67934f5eb7968b08a58d0ee8e675b791468ed8f7f80fe7daf6ac81f48959de90. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZDQH2204168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa190f6aa0ac1f5b7e1f8157714aaa915ebd25454873684cbde5e28c3f829ed78. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:28:06Z), 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/QZDQH2204169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c3457b7c116704d1a74ab4d2922b7ef14b40954c1f8c2bdd47d6f4624e5e2d1. 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/QZDQH1828081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e94f0d6d4c6048b6bbbdfcd60db4e56ab3fba6cd37f73e0927e6d72f4991c1. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZDQH1828082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac527f5885b65af2b134c17c2345c17e79099acb93073d9a44966fa9600834b. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZDQH1828084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x797ca2832f6dc415896d05958ceb68992b2a1a8c7215242ea45bc9edadec398f. 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/QZDQH1828085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x073fef8524fbe509d33b291ebbaa3747f55e8982899fb5689b8b3fada9487f07. 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/QZDQH1828086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb615464db225aa3c5d9aafb631a80e4388fd6d04298d870ef1d992e56635a34. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/QZDQH1828088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9ced8a05d35bbfb453ef9d7314cf39f70bed67ebd16eaf17c56e725bc35a06. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:08:39Z), 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/QZDQH1828099.