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 0x207523bc5c2cc759f1d3433790a83f7a33073fabe08d0c1c6e1ad43c55cd4357. 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/2cd1d67f-1b05-4934-85b9-2638cf877c0f.json and https://artists.proofprofile.net/proofs/artist/2cd1d67f-1b05-4934-85b9-2638cf877c0f.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 0x1efe0a55c45799a2ff0cead9fed26efb398e33dc2a032dc33333bc90e2c20f25. 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/QZFZ41956690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b2a4fc4a1197301aba85213729451dbac1e90888b280756d234809c8c651072. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZFZ41956691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d9eff3e33f5d16fa2d7419c86e84a83e497fe3d0a6e4075b4ee859c46028fa7. Chain 2 (Bitcoin): anchored in block 957684 (2026-07-12T09:22:41Z), 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/QZFZ41976892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a70efd50c22d967850c5323ba1d3edd2ae5f73cdc0677bfad97ee37fb5ea561. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:33:15Z), 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/QZFZ41971226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1663ea94d60527d05e35f84225625d23b72846370c56c28a238f0181ed26113d. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZFZ41970658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c51a172a3276904cb1344e3d6aac4dd19e9a2a85e7bb642504e79e08a0839b. 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/QZFZ41971228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3699345028ff633452934f4b827a24cc622529c7de7477dd56cf57549afa43a5. Chain 2 (Bitcoin): anchored in block 957680 (2026-07-12T09:07:22Z), 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/QZFZ41976894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20fbb2b6d89b40d66f1effecaea6359fe76d3cbb482e4760272542c2e431943c. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZFZ41972159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5668b8d78c04a4568d79fe97b61b887aff713b6379ddf785a3dc0645b2fdd253. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZFZ41971227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641a00e6c7a1df5a67723a8c7577ed2d7efde98fd391eeb64aebf7394bf7eaa4. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:41:56Z), 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/QZFZ71908134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39bfb45ed7e875167f1ace42bca77d2a17b4aac50d3491db31e01af91cf814aa. 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/QZMER2239726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x226aba8b3a856535e25e0fb5035b4107b2784ff36a64208fe62cb4d8d518bd44. 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/QZMER2383573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2250b4486617ec4f605fc35458348a51a37ae310840aca18f680e0f79f4e46b9. 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/QZTB62393201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d1fa14ca0bcd74ed7b9aa571188e9b512c754bfdab888f523d6168cc2276a1. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTB62393192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6cbaa23a45385b7e7d8618317335a14fe345394c3a821e83140c8b7c37597a. 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/QZTB62393208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e67398e12d39717f0ba2b915db816bb3029a1f903a23a9dbc8c1d1ebe3372c2. 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/QZTB62393206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2bed90ddc8ca78c7e0490cc71a3381c751cc11210628c1338f0b82edb8d4fab. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZWFF2349013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b0bbe5b019276a790085207a46c84f15484d8403e054db67c1c003f54df905f. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/QZMER2491245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93f9f1545c8e74b6aa9e5e600915d0ffb55333ffd90175b712b98a7da351c2c. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:02:41Z), 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/QZWFN2435888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5413545178d91a90edc2c1ba12ca492c3e24c7d268289cd1a3f06880b9704f. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZZ7W2414068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa056bbc55d694107831764dd6856cce52a24280e36a9355dabc19185359885de. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:40:57Z), 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/QZES82514609.