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 0x7e53f8b7d2f902da708712e1d448e5da3daf925cb0772d31f5e154996aef6a8e. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/41013abd-c985-4233-8260-0d15bef36666.json and https://artists.proofprofile.net/proofs/artist/41013abd-c985-4233-8260-0d15bef36666.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 0x15b79d7be0b335800a751b2af11906b035991942337ab8c9cb0761cf8721bb19. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/US7VG2418286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa199cbcdc9c21e315860ca76308fb60083925f347af00b19fbd85ca65c96c5. 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/QZNJV2568961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x736f96cdbbbf27196ea5a71006e1afe2a5cd817d2ad10649839cf7be4aca4ff9. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZNJZ2527492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a06f037ca3f4bd196689b5434b5d3e9a7e524077f50dc5105e71a9df5c11fe. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/QZNJZ2527493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f414a84cb63ad5d26622c9c490593ec6014b25c5fb068905fe0fd881da5022. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:09:14Z), 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/QZNJZ2527494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef5f7817012a070bf86552ad16f48725b64e5a560a1d7dda25b6adc95fd5db4. 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/QZZ7N2549694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x447ab62cf443e9cb542d00acc70d37a995a8750a41e2c2e924446672bfca3af0. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZNJZ2539843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x758f3b273726ea61c764d34c17affc0ecc69f9da52b760dfa491446996498ad9. 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/QZNJZ2539830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e0a232ff27ba3aa7d48cf876f500325a909c30c5306e8863e07ed2a16b3a1d6. 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/QZNJZ2539836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45da48d3de1748ed0959e33c68d82723d62a876252c0e89cd31b1cf7a73c25b9. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:30:47Z), 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/QZNJZ2539840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45956b0dd1ceb6f086c611d65e474f06be567df9e8fb2e47899d9b44321d20d6. 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/QZNJZ2539820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc175930c3e96820c28470a4b2af8f3323d548024925741fbc40fbfa32e7f487. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNJZ2539821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463be33f0e9ded45a7fced116d149637168525def6fe441edbb42f00d2bad3b4. 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/QZNJZ2539826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8685d29fbe5e1707e45bb14b5262d7f8e0769e6530c277011ddde5e1e38e8e6c. 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/QZNJZ2539824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee2b6decfdaaef036bd56fc8c516cf1a2fa04d9e8ee9449c887108b84081ed1. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZNJZ2539822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fea643bfae3ea40d52b201a7726f399919cc380d67d1d8374a9f1a17816c329. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:50:52Z), 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/QZNJZ2539827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de1ca29049e063f5787512a1e3a0ec4867f24340ed9b1424b06c39bce988481. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZNJZ2539828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf405168371e70b65f5a57849d08378e04de1936a1b30c662bb0ae13246612753. 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/QZNJZ2539823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aaee179935c93cdd7d700718817f52dea814a42a23007b80d77f91de0ea4037. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/QZNJZ2539829.