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 0x1841fdea67977c1f6c7898f8305d07cf082955b8d207b403201d64f458ae61e4. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0a1f3faf-cdc7-4234-84aa-f5699e2135bf.json and https://artists.proofprofile.net/proofs/artist/0a1f3faf-cdc7-4234-84aa-f5699e2135bf.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 0xffa69b213dfdb332e3761d71b55eb574ec33b706a1799b5e646822ee12b21da8. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:26:48Z), 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/TCAJH2538079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69882388dafb691afe663f87f8cca3338d26217c791fba5670cac779672347c0. 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/TCAJH2538105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0abe1aa05715105fb1cbbf74b613d44f5407efc1aac941a15283ee8dae56351b. 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/TCAJH2538119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73cb2f0e75f7285cc27cb91d87439b10059ca77f97bee0c2833565adb14665dd. 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/TCAJH2538143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc28f110b80ae3de8a6feac47335d64f35d4e3c79342c221b10ccf7739fbebd6. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/TCAJH2538258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc3fc6dc2b94febdc2de23ea8cdfa2ae2fa9e89b2450cad5c491bdb5eff508b2. 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/TCAJH2538274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225a13b428b46e6b82b886ed193555bbc6bf0c44ffd5c10a9ead839274afcc1b. 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/TCAJH2538453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a36f1ed01f91b835b49a71d9e71ce64f78651c2507daf4257a028427ebf4100. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/TCAJH2538464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3beb70240f5d01f8484c6e8344d66c4948ed631c86b9705ce7a0fc2f10990c73. 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/TCAJH2538478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9053c955275a18ffc3898ddda1f5217c1241e123c0c8330da3a59284088558d7. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/TCAJH2538489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e5ff0ff04884e1f04374082ac1c6d548edd2547f6361ef860c7d116b7f9b3d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAJH2538497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03bacc4a75b7bfd7e72a28a5e1583f09bff994c1d8bd45491c5cab484cd43dc4. 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/TCAJH2538521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da721c8570d13339e975f0df7e25421b5959d9e55114f1f82e30ab1e81a3a79. 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/TCAJN2574433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3c07ae47a9f0ffe5bbe94ea9053f6feda3480b6ccd04b0d8de0e3f8f605c4f. 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/TCAJM2574448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c21a36383bc3ac690c77c06f44280c378172b44188bdd10faceab103eced6aa. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:32:51Z), 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/TCAJM2574457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286ef26f4c93bf8980228d5bdb449346196d8b6b2b40d4f7712791aeab3ce201. Chain 2 (Bitcoin): anchored in block 958487 (2026-07-18T03:43:59Z), 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/TCAJM2574464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a7657dcf9db60015394c0d3465c234ebd1920acf450bf2afd083fd4f352f56. 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/TCAJM2574476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3be200c2970fc01841dfcff889f623088d7b81184c0686950fe4b3ce3c5ec7. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAJM2573707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e62bada76717a62600b09b50c86f24ae37039b79ea227cd6f8cc5ab0a23d54. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/TCAJM2573762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x231609c684ae5661c26df8b3b660e81618f99b1f9eb7ae42b79e586cf3bbfafe. 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/TCAJN2573766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15268957de0e8f662247c88f52258a23d5a69e162cba365fb4db380e6872a51. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:10:49Z), 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/TCAJM2573814.