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 0x1f748cb4f87ff76b4be02f7ea559df1f2cdbe5f25cc666c78cca5ce1ef5df597. 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/0f2f78c5-df05-424e-a5cf-5b992a879bdc.json and https://artists.proofprofile.net/proofs/artist/0f2f78c5-df05-424e-a5cf-5b992a879bdc.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 0x185ec6336e2a5a917555dc1b562b726533c64d80ada1a7cb834ed4ea0e5eac29. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:00:47Z), 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/QZFYX2091742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a55957932d79d795e3df1195b51e6864e69621671042bf28b7b81a5689bd5cb. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZNWV2012916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7b86931cdd030ea453c94b38b856ca9892a13bca63b58c87f055dc5fbec70c. 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/QZFYW2141698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f00239050573ff85274a4ddfd8b277b3a60c4866b316dfae660dcc2c85abfb. 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/QZES82117737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ed2691ff60fc01ab693618f9177bf69a0e106f7deab44a082ca729c72fca23. 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/QZMEQ2120156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca6d827ba0df31d0acf978106a337f573bf8dd6c8e87aec647038a96ce07eba5. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZNWV2193856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe71230aeae5cf3b49e7ecb850aecbc856705a4de9b01b0af56a8c8c59a8ddec3. 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/QZK6Q2212644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748792f5bf81699f70aa4e10a743531fe127f8eb5a230ff936fc50176b8802a7. 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/QZK6L2242089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6626027c87f8d7afb22132d07483566fa002cb12f406aa34be4a26c7f03181. 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/QZMEQ2218028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e47fbdb43fc00b99f52e1b2f6b6c6483ea70c1b685aab9ee4460549c04f180c. 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/QZTAS2201380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21daca8804f1a1d79dcc28c9433ebcd0a50bd8411862c8eaaf0425e20fef39c7. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T03:58:26Z), 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/QZTB22324661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18442be8dfef12069f8979479d66560930c4c18b6aa977767c2ae17c1f03c4be. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZTB52350597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec58e474251847090a4a964e2f9ac22619d9eb76def18c915d1f19efa5f90f96. 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/QZTBA2370751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6d06a01d3629211d1af95d128e826bd2077a8d200d48b9512775bde325b06b. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:26:22Z), 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/QZWFP2343874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6ebe9f529d54604989e8b08f21b9bc7a9cce748a5bc122724bbd937e849b72. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:33:04Z), 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/QZWFR2348421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80cc6a83acc6de5f9c8ecaa713de6ed1b02ce401a6341789a1680139e2e9fb20. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZDA52403669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51bafa1d9b9b798b0af43cc8578cff06f6a638e1918e92451faee6c0fda0281b. 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/QZNWQ2454992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb50b2d35014beb727209f58a29ac60b2414ef953ef9bf9afbddc8ccc1f718c9. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:32:07Z), 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/QZTB52498322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e7d3b6d8aed6acf649fb13fb4bd583284324a37bdbb9b8f7a6615091d0cb63. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZWFR2465820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb649615db0192c2c3659265340566f08c139efa5618288cd5f7a9e6b151501. 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/QZRP52475369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b04972aa53fdfeaaee45634c3ab09ef3db7cff2af436ddeb26e942770efc227. 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/USANG2451206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7340c835cda74cd6d101b1a008e8860efc887eba4e50e02162a45a861db0a028. 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/QZWFN2439127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc1603d8fe28680865ec7e5f65d0edfd2272573fe5d2cdb0d91f7efee029bcc. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZWFU2479490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ece554c329bb950942f84ea8bfb3bed0a8d935753e5347793f1cb2b0b7a3b07. 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/QM3DF2405994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141040c060156e1c802f1de6f2a279b2c6de54e2405726a9d88f681bbff5ff19. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZK6L2563467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83d767221d86c0d532fd48cae55e73f276d3906a0559917852e7741436f8bfb. 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/QZNWR2597036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef7b1399d5519dd53fa4be84ef348dca5bdd792ad99251658f50707165ae733. 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/QZRP42512560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcebb0b1934a9028c053cbfaa8d2263110f666dac426c861c2fc3ba3777886fa6. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZTAZ2547514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8acc9adaa8e3c29b67d4b9c89441c5d4767f499395b9b997f9f4936c59f7b78f. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZTB92592072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a1bf4493a7be95b6b7c12fb07bc867b27516b1b23d05ea0bc17e29ba71da09d. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/USANG2516121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9278eddd5464e2e4fae435792d28921b259a25e32b291995454d1dc943bd64. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USWL12301608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9278eddd5464e2e4fae435792d28921b259a25e32b291995454d1dc943bd64. 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/USWL12301608.