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 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 0x17ac4d25d54dcb63d596493fa1c547026487df35d02528e30d350c5e99964506. 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/50174346-b1f0-418d-8089-5a188ce59a39.json and https://artists.proofprofile.net/proofs/artist/50174346-b1f0-418d-8089-5a188ce59a39.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 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 0x84e83e0cea0d12745afba0a10043804c2f55efa4371ebf6d21ff429fa0e14dce. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/QZHN41921472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41aa50ddad7d917e33ad1c487c03fcc61f5af90a2cf0676c091e0beb8c4e44b5. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QZFZ22028013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5435471b40d6b4f86ebf13268e49cadf665f4d61445aa006416d2a46e7eb96c. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/FRX762066809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08eb700111f0e56642c91cd83e6ea208d2fa711339b7e0402fd6b683482f731f. 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/FRX762066814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3129d262ec178e56ce5ac3505a5e67f7c7cac28e9ea9853b986e8633f0f362c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FRX762199177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e844fe4a3af76f5c6d45274550ca00c9851f37c2f684b0a597680762118503. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/FR2X42200345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8480b64f36bf8c14b7e6e22ea7c63cdef861f15ef85696551b166e0e8d6b735. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FR59R2276337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9614ffb707ceb2e55d69b51eb5534320193cee5ec5c3895d48ee26315196f8e4. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZFZ72292988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f54df31381a1a1ba2736b445f8ab41d252608bb63fa1209b85a14bee2d09494. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/FR59R2276340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d5628fda336c9d60847e54242bbb5e37f91949b6d6763635d0a3ec4626828b. 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/ITTEW2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a6e2481e87417d8dd9b98982528c20e11902e51c5459cc8a83e8f5f063f75f8. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/ITTEW2300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c738ff6677c438f9e5c71be15384875ef6fd3176332008988c7e2dd6864d29c. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/IT7LD2301813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5b5e2c4f92d91c0b8c298843c92e9172ee7eaa902cd44619002b9b3ec4f869. 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/IT7LD2301555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69bb630230f438e2eb8ac404b67843f22d1b62fa8bd74949c4fd38f5ab7a226f. 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/IT7LD2301814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f2adc2b1f511571082e4347dbf394b69c95ba352caebe3ffa5eeb88ef42f24. 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/ITTEW2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051444290b4cc1e8e7cd2d86c02a787a01ca8a70fe08a97a7fdb2bec057c3507. 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/IT7LD2301356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b85c0734efa78197bfbcb84cd146674eac0036bdfa28ac29aa5bd05c72abe8. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/IT7LD2301817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a95dc9f1129196e034806f1387280ae4e3ac91d201b7f53bcfaf7b8d10568e. 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/IT7LD2301818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5b5e2c4f92d91c0b8c298843c92e9172ee7eaa902cd44619002b9b3ec4f869. 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/IT7LD2301555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b5b35f4d9e349dac18b54df3f139e24cc9738105f454bb7985e933e993b4db9. 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/IT7LD2301815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe40418fb5a3dd141f55fc454fa51b49845a2c1f1ea78d354e4308b49c6faa916. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/IT7LD2301816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051444290b4cc1e8e7cd2d86c02a787a01ca8a70fe08a97a7fdb2bec057c3507. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/IT7LD2301356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf8ac34e408ea38e0445ef74800cf8ea1b88ab8fc5fc1365c0cd8220586b638. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/IT7LD2301028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x178584b4a0a08102c6f55c46774ea65516f253a0da83d827b6faeaf278a9a523. 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/IT7LD2400347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53583b94d724c0a579cbf38b8bf87768c7cf5ef7f9c9506baa578c40d1b8e355. 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/ITK252410030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff9febed619339ff6073b387fc23d53141c869bc1ff56aa3e9beffb181ea4210. 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/ITK252410032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00fcd2a90142c040c28aa655503ff2f68547f0ef7a1026881aec540952f98630. 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/ITK252410035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5300bfd39de9075ff570b0d660e3cd3272370e08291ca33e0dd76575824d77. 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/QZNWR2368242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d8faf9dc8ab28890144c500f79a48077acdf6f838c60236c17002a1f04e583. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/IT7LD2400983.