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 0xb5cfa2e7866378a913736ee4aa40b4c2474d309308cb11f8de4c69aa8dc228d5. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0ace1a55-d74c-45e0-956f-173e03330f1a.json and https://artists.proofprofile.net/proofs/artist/0ace1a55-d74c-45e0-956f-173e03330f1a.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 0xe2240b58cae9089e4422a5631cbd6ba76288f01a225a13020382214b96973e48. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:17:39Z), 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/QZJG52549150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db6f966f552e579e13f116e35558e35f9443a23b34c3e73b70f9664fe26ce81. 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/QZK6G2499883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ea607db86da2ae3c82aefb36610c6ec6c4ca873b85b06b94c0bbe89d0bfef4. 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/QZK6F2400967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0378d48bd75878c4cc9ca21f10c7e054c1186c8560f818d212ca3e6a78823a6. 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/QZK6F2401002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb111a2fc569dffd6ca616a8bf725e051b621c03fca72ddce7afda240b6c18a. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:40:23Z), 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/QZK6F2401065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63a7529332a2c61081a5f8752fbbc52df96d41b7b484b9a10d4198cd4c1d4ad1. 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/QZK6F2401116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417af2a8dcdaf16ba87bb67feddd2f458375fa0e1f1f2dee25d8535f75aedad3. 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/QZJG52549156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff01c5ace48fcb2ed3a01538e6f8fbabcfc0f9b9b456ab866f0fc6f3fb5a5327. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QZJG52525866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd23408fab248517fc0c3fd727dfd9a2ac04d25e5f1db96ebc0e0068af60bb88. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZJG52525865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd380c349c5d1b7ac06d079b09ae312c3863b632ac2764563d0905321b128d1. 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/QZJG52525864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bfeb54b031bf6562ff21001cd8711f8aa4f857b12a58425c72fa8cba96d81d8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZJG52531562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x104f40296490f7d2777760d9222da06dbf3fa80d9dc1723e57b4f884b57a3998. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZJG52570526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd915df8833c422a25252497362c969de982b77ebd92537738bac1fddb1e99b5e. 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/QZTB72551366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ca69daf6910b1e3871e241166566dfad67a5658c169f1451ebeb4b5acd7ea6. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:03:32Z), 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/SE5BU2562653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd442b7307fa51f0def4baaeecaed3d57bbd98d11259937eed310aaafef2dc9aa. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZHNC2520458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4a22e72fcb4944181bcbce0560bc0b9859edffde6b6cbdf241be99b0775a13. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHNC2520459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dcb34ce4d73c544e08cbdd6d5fd80961df893bacdf04404c2c676da1b25c127. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTB72548089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0803a2574091a9ff1f751673a03b7b957603e2e5f99a1c87c4e1712af4cb441. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZZ772534380.