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 0xfcf086388509150084ab36a0ab5028036686d2a61127f9787b6dac5dc11f3042. 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/fa23df79-153c-4321-8615-754c15c7257f.json and https://artists.proofprofile.net/proofs/artist/fa23df79-153c-4321-8615-754c15c7257f.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 0x20cbf26f60f92496bb7c4a7807dfc455480b9c574ba3cdac716533195e6a54bd. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:16:16Z), 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/QZES52282308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb9e0847ef380a31f676bbd699357732e754244c845979b4e8c413bde9ef992. 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/GB8KE2206993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab4604700820116dc110ef1034916191a6c3fe310af00dc39557d99ca36f1325. 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/QZNWS2299451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e09cff543f60fc635b16d0796e97eaaebc401d32aef955adf051278a10c41d7. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:03:52Z), 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/QZHN82384298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b771aaf943455825436d9b7bbdf9bb4e8ebd8b980b13650490da31cf212a5f. 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/QZNWY2376286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2936ac6e9bb25c36782b048a5ddbec12759eb6ecc0671f309514afcf1cc156a5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/UKZGC2306270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b78f4add2595f8f466e3a1cb756c3772315002d1d52390368f8b0a120ae7c3a. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/CA5KR2413930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf64dff9663625e2846280872cf826813435b375ef90ce85ab79e46555c5e5bc7. 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/CA5KR2413931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d567df8c3b275c6947625af22405a25d209d15e057ab75542f2898b534fd97d. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QZK6Q2426384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x017bad1deea7ac174f391ef6b0d0c253b009da194dc9d4d85c4106433fa78de2. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:06:15Z), 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/QZTB82424620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20626be1d64a45abc19244094b684edb1f750797f4e51a06847328a407854693. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTB82424621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c31e7b56b8e98633166fdcc0d07f53cca9f18e7308abe39e68dde6da5ff7a3b. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/QZTB82424622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f5b736ed75cb801db640ba3e5851a78cf090afa95793f9bf6010c312e1c4698. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZWFQ2470618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1e307302b29fa5ccab70388a4d46a233d33dc5676fe1b872e16e1e40496844. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QZWFQ2470619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c692204c8ea49a63f3d96716d658a01da90149893a409690af1fbd0785a558. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZWFQ2470620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90094ada76a1383368d1917ff2fbc9b532639af54863d7f5697ddc268ebe60ce. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:53:24Z), 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/QZWFQ2470621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6fae2eca70dcf0ff290ee5fdd209547066ed363b5adbc790be9858f17aa59d1. 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/QZWFQ2470623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19dc88968d5be4d5961ac705e854c6e9a57a6e212e81a520603f4196c55e6aef. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZWFQ2470622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4090e2226a92281e49a7170355e77f3c37183fec903de97c01aef6baeb135dba. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZHN62516157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ec744d7dd500098401f45c378a110116d3b11fb254fe38d15de6609014e2a7. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHN62516158.