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 0x11e12ef8f7cad7da5269acd458f910b3986b6e99153b953a0602984b227caae9. 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/1d09ab11-b399-4cff-acd2-921878d9469c.json and https://artists.proofprofile.net/proofs/artist/1d09ab11-b399-4cff-acd2-921878d9469c.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 0x2ae6f86477085d83df7cf0682a4b303c721c7549ca66e3703a909b47e2ddf3fc. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/BEI161700073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa5651625c9b86de9003ace03c659a7e52a3f598546a48aaaa3be6ac0bf79b3. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/BEI161700074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a74c0eac4f9d1bf2f40ef1b9710e1543a271ecca5c440f31068288d0db7d3b0. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:56:46Z), 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/BEI161700075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe44bb34978ad2ecc0fb849b8937994143e72518b6d358b2ae666a687badabfa. 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/BEI161700076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b5df16fc2e27e20a1a1e5ad15cb00b85f2fddfe8a78ab372d85277602af834. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/BEI161700077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe878d72b404ea4cadd67598c889b44d970246342c6af4a2542477cbd57692cce. 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/BEI161700078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8649a90a7033300be97bbccf363e0c593b63497fed41281c352b7e73cf246e9. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/BEI161700079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb188eac7fc878a247edd9a59c5ff809cc227c0bd0a92de369b06f7000078a6. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T04:58:44Z), 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/BEI161700080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4adc759cf1f28ef7299ec5603a8e7bbf912c4293989f7663f16301091632d87d. 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/BEI161700081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd3891eeecf4cd4ece5fc6c6c1c9ac6d25f8db2553d6b89a0c4a975ca82e366. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/BEI161700083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fcc5671c046d45d27b12723df26fa6ce584d9cebc4b949b1f6704ac2ee12830. 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/BEI161700084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09efbe9f2493e908de7ff1e56c0f6a36a85c136079cbc654c5815b45fbe307dd. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/BEI161700085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee75814df9fe760563ae9331374027ec9243424c80e50e7b03cc0767fe8469f. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/BEI161700086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf95e8fe77af3b777eccbebf5433606b83ed4c8ad1494401b5623330bc758b87b. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/BEI161700087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3dd51799b0a836d89ba68aae5316188847353fdf4b80a82ea01f4c5cd930bad. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:57:21Z), 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/BEI161700088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c988e9353fb8fd84a0f80e21e59f701f3c256552997dc0bb0dfde1096bbcbf. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/BEI161700089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7cfc9fa6468fe40c4e58ca64984ac65fff50a8b1c207ac30e69d4f34a134ac. 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/BEI161700090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f084cb3f1db1e39211024ee568f70625acea8a26a9cbc0e6a1e7d4e99fc325. 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/BEI161700091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d3aacb96eee91b42d7bd8ce7f7b74aa2c39cb1aa5d13dbae13901c27013ccaf. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T16:23:37Z), 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/BEI161400082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ba1fd911f1779a2f806f4dd7bf0566fdcafc1880ec1a80f46f0b2457284a3a. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/BEI161400083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7432b2609b07166d603b27c9eee6d9e2a9d832ea8f5af256f6a328b45a32adb5. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/BEI161400084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60323d491ddf6c36d658ba553c0df7e76457f314ee35fde84d4c4a2c91709ae9. 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/BEI161400085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf43875a6aa0a362b1265a714975f023f0a9b7cc095d86e144fa3ebc7de03ed90. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/BEI161400087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b2c19a6c15ff993322d824b8fbb6e822507c0a4979cc4236a9cc5c95112ce4. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T05:30:12Z), 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/BEI161400092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c25ca4fac0b9abf38814f0d6075d5c17dc2bff0d712d025c734f9bdf67a01b0. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/BEI161400093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e0ff0d62ef72f73e424b745be639446deba6c97bdd878337424480cd9217f0. 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/BEI161400094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3525f2cbba98b7cccf5df0e80a918c6f30eeee8098fc24dfbefd3b585b57d61. 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/BEI161700038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceada99c834a9a39f423dfdf347f6818488733849e794db5cc31ca0cc14f2a4f. 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/BEI161700045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f600bc92805a80595c8b25a474e171ef6a1ad1aeca5d28ac716f2a69cbfc949. 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/BEI162300105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c9d9a7ff1925de3d2d5038d476cea07cbc31475e1b56c55b78b139121e6fe9. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/BEI162300111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf916112718036d10fb4a29be4b41dd27470ebad75693e657225f32cd927878c4. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T14:02:19Z), 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/BEI162300191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d721154010841c17b50bcd274d42345c1bf75c7b8d5b295cc6b5baec04fd229. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/BEI162300192.