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 0xb44245f7292098677f562236aed9871cfe5309d2b95195587f5e0136492365c0. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/54a3d11f-97cf-4ea9-8035-3e0cd2ac7f79.json and https://artists.proofprofile.net/proofs/artist/54a3d11f-97cf-4ea9-8035-3e0cd2ac7f79.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 0xbf2acaee82711a48801479417116e9b837014508dd72a6c75d9342cba4aeb5ff. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZMER2470057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbf75e89ddcc5d751c8477bc52bbae3abebf4877b005ce9862ac15bb104aff85. 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/QZWFK2404281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77b99d259be0a81d3a0e3aa077c8fa59401b590a9be8acb813078f7dcf037d7. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZWFK2404282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6da302e5acfdeb0a5c5756f5ed41100a8cc168793eb9173dbe981c3c7322f8f. 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/QZWFK2404283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87c1801328f1f009abb4454428b6e1721ac576dddbc9b7d3e8188f12bcf951c. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/QZWFK2404284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f0244b2bf3df0ffcfa41eab826ceb5e56eefe23fd9b4d662c481f3fe0a99611. 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/QZWFK2404285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d9b3a6b505e011b9489ddf6f0f8a8010b7ba193cd441f593aa185071d199e4e. 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/QZWFK2404287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f6f7aa480cceed1dd986b13bed0433cd3b14a6de0e9352780c818ccfc0ea22. 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/QZWFK2404288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f90086cc55a7f0d65e76eae57d1520ae5002adbf7b2f9edee084046346a47cd. 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/QZDA42560194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe40c5c3629295c6a8596a83cca69f8e75e4ca98d2aeadfce4c1c27b9faf4b385. 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/QZDA42560195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4243e3e13c367f06325b6ad0ba49203a828d02c04d263ee9a46faaff3a94bc9c. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:17:23Z), 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/QZDA42560196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57348e22ab678765d23d3a2f9b87edc1d73d82e1ac9adbb6aca75ad8079917a0. 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/QZDA42560197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3049da89747d046fc69f33fd3b633f281b431bd3609b6f463838f8dd60e61d. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZDA42560198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2effa9ee018b60acbf6f7de7fd9ea5d5683ee33632f5e71f90285153794f5ab. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:43:35Z), 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/QZDA42560199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97bbf08902b6a798becabc754c30e8b1f1de4381df242fee11131981a09a36b0. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QZDA42560202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc53a8a18325ff4cb84ac866559e14a0b5f6488a9d4e5597f2494c3c09235b32d. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZTAT2585880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x972f72f79ea4f9ae086ab9a1643e689dd4d0757206b3b9423c375f9837e4a558. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:41:58Z), 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/QZTAT2585886.