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 0xc61b78ac38e285aae2af17fa98d625df6cc7b19c32545254601708b70cf134f0. 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/0859fab7-8092-40e8-9018-21f50968acd1.json and https://artists.proofprofile.net/proofs/artist/0859fab7-8092-40e8-9018-21f50968acd1.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 0x8ae12eb62971ebda871127f79b0fc5607395deb4e68239796a696b6829514ea3. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZRP42100762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a0f241884f1d0e989dc8599986184164ce57b726533d50f029425a8fd9c6bd6. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:07:09Z), 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/QZNWZ2164039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689da20853d5d21cda0b8ec942e47da91609da1ca5d847b0a2970bc6db194e09. 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/QZNWZ2164037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50926c102e5bc4f2d2fbc41ed6cb9a5fc6d040318090e52c1b7caa02c252ac2. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZRP42100763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647920295b6f1c29f2989bb736d1a21fec9caa85af15b0aa0e47d07c1bffbeb6. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/QZNWZ2164043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ead3e4dcd5ed241d4207f22492a2c4b9c135f8f8ebaeb1101c89954c42db438. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:07:35Z), 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/QZK6M2271262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892279fa769778ed7d3bbf84268f87885d454708a3c191cb2724f047301be27b. 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/QZK6M2271263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14420d94bbf549a60c8a572a6f25a6cd3cdeb9b8f6df6b2e5375a22f42f58738. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/QZK6M2271264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79086064f36eba60289d02ba9198be51a5a5fa5db4491275d2615b0852acba0. 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/QZK6M2271265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cccd0da7844f20bec2da5cc1b44ca21913cc70bbc248c8d713b83f76e8a6c40. 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/QZK6M2271266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x063db43155c91b0d8c8d4111955be7631c39b94b71169328103d0b45af323731. 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/QZK6M2271268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2d34b8530454fe78ba4cf3aa8e73345deb307ac0af3ea11f4176cbd6dc9564. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:26:17Z), 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/QZFZ22336071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a68846d1c842da1f665963701a41121ff5d9e1d2c47af94dcf3cb8be46774a. 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/QZFZ22336072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97584625f25f9091241da2c461735e9f8b947731f8851e05ae39286b08cb493d. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZFZ22336073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f2499048095b47dca0e2014af18b876e9d59ed4f15e9bd020435aee84b2974. 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/QZHN62313035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d3f81adfc757a6a5834fb26d6654030fc94fcfb3ab5f02e76d0851cf9eb67f. 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/QZNWY2334892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547e9b5209585ae206cac95e48155e29117e7f397000f4ca0abb2d128f1474e4. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZTAT2383150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7e676e1d5ec246f603aefc748a5dc09b6c45b23cc88a3a4c9e13bd9ff1a118. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:20:52Z), 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/QZWFF2388200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11cb7a78fdb8ab27fa799ebbe107d66ca87ff992c73e0256f77b43de6f4987b. Chain 2 (Bitcoin): anchored in block 956426 (2026-07-03T01:37:49Z), 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/QZWFJ2306727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec5f3546c0d47eb25a5abd18a67d1f37403b7fcb06d462fb29d79977efcf995. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZES82470702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85299936610a9fcd948807e0632236bbde2db601d4855d28b3e03d6fb26ae720. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:20:55Z), 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/QZPLR2451004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf95836e55fce1ef2ead3dd3df56a45a5bed6a472d38438567f6ec576fe4c40f9. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZZ762451301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ad479d82e0a6fe92e7cfc366b721288ac4c8465195af6987211110cffe49ab. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZWFJ2491245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544d64d31058736ae994654ba5ab38451a6f6a8bdc79289b578e402709becc71. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/QZNWS2429294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f6c1c7892d096fafc68ec203c846e1c163dec4b3faa19c28039a104dcde3d6. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZDA82571092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cea951ddbac8916c826a3e5460d7cfccb2bef0c9bdb3d6f302c36b0cfeb68df. 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/QZHN92557694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f6c1c7892d096fafc68ec203c846e1c163dec4b3faa19c28039a104dcde3d6. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZDA82571092.