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 0x3ec0a5eb200e77469521fba5c5fa41672ace1cc52c9074af01745e9d1c9b36b6. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/62d6c68c-d985-4424-a8fa-e075f784a275.json and https://artists.proofprofile.net/proofs/artist/62d6c68c-d985-4424-a8fa-e075f784a275.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 0xedc61034af31b26b07bf5bc2889aa8a8d13299f8cc0c88a4432a9a04ee3e644a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZHN32449379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf64593d882138cee88df54d68ba58a86e9796101f68b50e49dd4f4fe378dca. 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/QZHN32449382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e72cb58dd7bd9721f14d3ab8d5b2af37842c865fc3350f06cbe1d6e414217d. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZHN92442138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1b8976be504d5bd642ad6516444fa44adf8c25120c28e41b23137e07985428. 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/QZHNA2424805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf458d78d7632c74445ef8884546e289fc979c8bd8406ff7037a49960d8b21cd. 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/QZNWS2414731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8880e38115770ce53bb2cc3eae78eb8e80fd6681a99927319bd9ce806d98327. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/QZNWS2424075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c27bbc8f4ab0551bc304a72159f8877d415bb7f0b5f7a8342daa647cce1f9a7. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZTAS2425829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af0a8dd82b2635eb80d0c4a240a7666a8f74253402732a0d893c7874aaac49d. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T21:00:16Z), 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/QZTAS2423863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa76a40b5476c831b62e3fb33e076fb07e60203d7bc8a3a0a1ff1bd65ab38f3c6. 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/QZTAS2426797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b0b7a1bacd98b0550ff79cde459f0849645dd5ce7b5286d703f88be715ce151. 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/QZTAS2423862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb8c24caf7491369c98cf8cf5c86627ab13d0d1ac3bea8d35ab556cc77def06. 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/QZTAS2426795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19479f33124e754c2d3dc99771bdd8657adb1eb9d27335dc40406d0e41b4f441. 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/QZTB42498952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2390f1b2c22e1df02edee18fb3e23b84ec3788636df44f7c625efc1e932784eb. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:49:17Z), 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/QZTB42498954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f14b857d2883e04ec7e74f2efbe04e3476db0202490490509d893215d768ace. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZZ7K2401609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81b85241b929f4982aaef2f0d6c60ad5236dd8178ab1b42dab0edaf3ea93a08. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZZ7K2401610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14219b714427ce275d9403228d3ecd2963fe93a77bc7f5530539072a6e89379d. 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/QZZ7K2401611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b776644de27f603cdacb007035b9e6f9edf94dfb3474b26fb2345c8fbf70bb1. 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/QZZ7K2401613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f966f447da76b5b9ccb3ea6dcc00439c5d5ca07b4bab02bcb5fed4540516b66. 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/QZZ7K2401614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ada9791307b562b815493f23fa6469433f79126a35101e0510cfc1c532ae2ec. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QT3EX2476813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf581cb1ff02be18b07a0244b8f349699045bf64cf5483c7dce89294da64a4fe5. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZFZ42517793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec2524dcc0f717b37ff42918db3a7a88399a13ea4b3c1a0eb0fc9945b2019499. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZMEN2566716.