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 0x5245fb8b65992f6cebee013057b525594b48dd51103d3351a310ad330417f51a. 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/d5a4a750-fa19-4356-9fcb-9ed94323c4d1.json and https://artists.proofprofile.net/proofs/artist/d5a4a750-fa19-4356-9fcb-9ed94323c4d1.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 0x090a7701a6ca9316819ec7702eb53aaa3a933697d519de68e880ae63ec0fa5fa. 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/QZTAT2299191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70c1191cf56111530a46b6328191e5127b601edb964f3d2b6ae51cc713c49c1. 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/QZDA42255376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc16af4c2ca88ad0c36d5d8f2c5553228f1a416093204d8083f24076d269a1306. Chain 2 (Bitcoin): anchored in block 958042 (2026-07-14T18:24:07Z), 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/QZTAZ2279023.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d7b15fcde3951003193e2844ec1cebf2f0718415076023a605bda7d449a308. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTB82252765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0010f7a13bdfc142ca55b1096e72cb4da6c6bec46f6dad2d194bee95007d64f2. Chain 2 (Bitcoin): anchored in block 957723 (2026-07-12T15:34:17Z), 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/QZZ972453771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867031f2412a6ae6d6b4faf1aae7f876565093a56670e0a1bb521507e006b4bb. 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/QZZ972453772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29bcc3b8a45a6e59faf1d643e2ec0ab49ca1f948167844d2dc74a700d36623f2. Chain 2 (Bitcoin): anchored in block 957723 (2026-07-12T15:34:17Z), 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/QZZ972305264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450367439d984784e01f03a4b787cc1100ed4ffeae7c0364c61b2e815b9149c7. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZZ972453770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7b3711207a1a8369a071c817a22f5ae369a8ea5f5634a5756612cad1f2ab4a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZZ972446907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0010f7a13bdfc142ca55b1096e72cb4da6c6bec46f6dad2d194bee95007d64f2. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/QZZ972453771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867031f2412a6ae6d6b4faf1aae7f876565093a56670e0a1bb521507e006b4bb. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:52:12Z), 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/QZZ972453772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648a3e4d0ac03291194135e852ad28a89131ae2076ba9b52bead52fff680ab3a. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZTAS2384419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29bcc3b8a45a6e59faf1d643e2ec0ab49ca1f948167844d2dc74a700d36623f2. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZZ972305264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b1b45a3b5a070ae13f0f5cfbf2c2e578b20c4248a9df9bcb2617f5ccac2413. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/QZZ972453773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b1b45a3b5a070ae13f0f5cfbf2c2e578b20c4248a9df9bcb2617f5ccac2413. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/QZZ972453773.