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 0xe389be40a0936c64f8a9c76f1341836392eb6f1013e9445b0243feac986b5472. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cbe07577-bba5-4f81-b786-52a471457997.json and https://artists.proofprofile.net/proofs/artist/cbe07577-bba5-4f81-b786-52a471457997.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 0x1ee6e77ce3f77399053507911d745c329dc21d4adedcff516141516e11d97c59. 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/US7VG1840728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db5f21e9dcf75564d1714ba3a373dc31e872e11e6b1b8a22eb1dd277bf59ac6. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:48:51Z), 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/US7VG1840729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4644eecc5541be70392bb3d6b847332b5631a0f2f9fe104202c9a48d5986a566. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:04:54Z), 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/US7VG1840731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89dff2c26ea99c8d0ec2d348d7611256d47aa6b4bba7b7ad89be54cd6957a292. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/US7VG1840732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fbffbac0fd430bc96b69f32f1cd47c42eb9c133a5f0a685a096da28ed8877c1. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:25:50Z), 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/US7VG1840733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e215af09298e02fa9ea4e174c66123202b697cd51af9ba85413b45cfb8f01ef. 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/US7VG1840734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26ab9c16e2eebe9e0b1c7d1cb9c5d07c050e01aee0609d983fd4475e3a17b27. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:47:47Z), 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/US7VG1840735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9019396939f438cc80d646e7da8ff158e14a229ba3354ae86e6fc5b37097394d. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:48:57Z), 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/QZHZ31939696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a1099593b4eec8259e0d049b5c99f5387a9db381cbb6fba4668721b7814176. 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/QZHZ31939698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7dc175d35d20a75cbd9809694d5a08612227ee878f71897c34b2b94516840ff. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T05:40:25Z), 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/QZHZ31939699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012383a113490873a783d422a1d12ee52eb99147af4fdc0d921b146e83f66be2. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:34:23Z), 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/QZNJW2262846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5139d0618e747520f13f8218fbdae4189efd22025f0a9665c5152632096aa5a7. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:43:18Z), 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/QZGLM2475060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f3ad9b84deca33047c4d74c3ed86c0ffdf7a8fc7c037ff0cf51adb7d470bdff. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:58:38Z), 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/QZGLM2475061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e3b8731612c4abcdd440af630a92a68b1d61c7921d0b92c34ecd403ad6538d. 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/QZGLM2475062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d31c799e1c55642e1fd385dee46860e86181124282b69d58845ea2c5a9beab. 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/QZGLM2475063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3747257ad9a983b2b4cf60a8cf362afeb447ca7a281c4b41bc1b8bf4f018b47b. 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/QZGLM2475066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17fd31022fbf1d60dd5308b7e0a675cf627f6bca92bb1e1f827dca9046b78545. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T05:08:45Z), 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/QZGLM2475067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7bb9557e0dab064dbd368827383a460c817952f7c98e4fb8559b0b9f491dc1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZGLS2587599.