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 0x906f601b0f819832ca27895c3bfb2b152829bacbb39a9e6828764e7c1228d2d9. 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/79416b5c-d59b-43f0-8e4d-cb6bc334a83a.json and https://artists.proofprofile.net/proofs/artist/79416b5c-d59b-43f0-8e4d-cb6bc334a83a.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 0x8ee34f6f11d989fb9e0216279a4885e56ea3bbbc287e06853ceb4c543030415f. 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/QZDA52302163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4b3813a2927bb9ccf6db63079f98ada2a6969c882c80ef025c55be72461888. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:36:28Z), 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/QZRP42400583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1abe90cbff3c867338b2cb2b2fde65f37d1cfafbc3a66c8a601d669115762b. 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/QZRP42400584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954ba9b0ea823899bcdb617d524d91b23790769552243385734064a1469082ec. 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/QZRP42400585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5abd382e0d5274f01f7494a5112a91a4f7c5bf438445bc30b0a23286ef277162. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:44:22Z), 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/QZRP42400586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e56ad25844df5850995df14a6bc4aa66de24fcc55efb5e4975553cd2ad1a42. 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/QZRP42400587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb800cee552ef73ba4ec94bbd93b19484201625df73568d4c9ebdd485e5b52fcd. 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/QZRP42413264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3f78e63ebfb00a036c7ed72ef4d859c37ecbe9cd81aee6e1ce7451c337ce66. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZRP42476878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c3af9c4862da4342233e8d03fcbcb6be0669ef52823c3056968e641ea1ef55. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZRP42476879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8cd39664fa9769a276b588b9d0e5aa403f9692d26514e3015277cbc6d8ad71. 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/QZRP42476880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa543b92fe58152e2678a7ca3204077829dbfaab8f35d7777aade2dac7f2e4003. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:56:33Z), 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/QZRP42476881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de2c8443b4c5813d6a9ff878771ebd79b52cdb0792695e27aa2aee4b125aa37. 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/QZTAS2459254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x829718072cde54c1a2a3a09ae513d402ad46bdc0c9515c7213efc69cf94683ca. 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/QZTAS2450460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c751ec128389da64b1b8cb1b7a401b2080dfccd037910223d157b3a0035e293. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:19:36Z), 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/QZTAT2460999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06e295af6d97ccdab45ac63ab9a5767e83d2891cb4c3da6217579c5bc7582bb. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZTAU2403978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10dcd6737967253bf5644935d581d567276a92e1b7edf3503a9d1b44ff9feae. 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/QZTAW2430500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04416c62446ef12f06e6ab4e446c3ea58c252dba6e8416ecf10f938bfca5c9f. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-17T00:12:54Z), 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/QZTAW2441917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95329e0759358333fff69c1dc2ee82f1c7b41de228289d09fdb3595161022f5e. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZTAX2453377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ffc1e438736ac30596a486ea7f7862e3cbeecc125fc167ca0c6da1e554fcc12. 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/QZTAZ2420118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8cc4eb42430b9830e8b8887fe2ffbf92e8ac9cf890320751f8418bb85017d63. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZTB22472402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b5119338d0cafcf7332af324cc3f577c50e3379b4e65a0ad463cbb604994b3. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZTB52444371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b6ca2bf843cbc48b0d48e68f3d845c19976771fc0d705152cb6ab09d4c969e. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:59:04Z), 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/QZTB82409617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057bab4f63209e980a141a357af77d3a57457d8b1ce7ee387cb051ea9d651719. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZTBC2476426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb10004ecc869a3fb60ac8d6943935010f48e9ff3a5d3e212a06889536ad922. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZTBD2403242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56cbec5ba81676abcebd0d01c334f0cb53a20393cf70259a5548e82d61f82a21. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZWFF2489346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c7889c617cde043ea76834ebc277562a68af6cdfda180e5a533e8b72f1fec9. 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/QZWFF2489347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d2d5f6db3295ad18b2a46aee491a3824f4be3bde3824101c7e234ab62f7d0b. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZWFF2489348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c79d57f4aea6831a36ccee03c822f7083058dd92779fd82ca5c5650085be21. 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/QZWFQ2498646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac4b4f7147b800d56c7a777f776bb798439db7dc683d205538c882220998dc7. 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/QZZ762420859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15633015b03dfefc9efce6659673d9bddf019e3316c6e17b8dda0df0f5712d00. 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/QZZ7N2418066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114ce51d5543fe4a5fd7717fe2714cc891d9d93d35b119b7f28348a8d5e43401. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T23:01:36Z), 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/QZZ7N2418067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd1e0bd4eac9b9c346ee8a29fcd1a1908b2bddea6367fff7b18d0bc37f803c4. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:58:35Z), 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/QZZ7N2418068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58830513cf4934fb7774c7177557df5679e0536b81d590904de9db4f34cc4460. 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/QZZ7N2418069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a054a8f5f9312538e4d13f91a9b80b6f9450ce9ff1ce69f57fd8ef990dff4b. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T10:46:15Z), 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/QZZ7N2418070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3756a8cfcef18ff8478595882d7d7726a59f21524dfa054ab7ad14227ef4e4d7. 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/QT3EX2465835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46145f950aba42516a4563d49b6250afdb0b2b68c2ec551beef6dd5dc26336ef. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QT3F32455972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7526f11d0d4d564d5aa6223f20a49c52a839cc4ebaf702f4fefbebfd2e8c2ec7. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZDA62569199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafebe8fe83787e3bad329cd86d1dcc90b86e68113e62815d80f0c7eae08cbc4c. 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/QZK6H2505021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48e9946bb70c897c6b1f5937645eb2bf0ec73402ce6876e126814d08266c61e. 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/QZNWT2562279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bae03edbb7d30782347040e29ce703c520915a24ed7fbfd41b55f1e259356ca. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:00:29Z), 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/QZZ7P2549012.