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 0x4e19316a77a25816fefd1f95621e5542ee05172b0adc9a3f0a86b52c8127a525. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9ca9df25-b5fc-4535-b541-e40c5be6a77c.json and https://artists.proofprofile.net/proofs/artist/9ca9df25-b5fc-4535-b541-e40c5be6a77c.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 0x84a1e89afe05d87a78f219b1211fbdce115afcaa3b3fddf3460bf668fb6fd776. 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/UKZW52100104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921025ba5cf2df1773dac993da80da9f7d8694fbe023297106ef5ece5a651bd6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/UKZW52100105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f95035103b2a9d3a6c47de8c709882db6175f1512ae78a19c279abae883d71. 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/UKZW52100106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b0f3bd46aabb446364fb4145b5e9bbacb19205681975585debf3afe0e195f9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/UKZW52100143.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2061d0fbf4ef9c57fba8ab43872901aa5d91fdaf99a34d1ba2dce1741209e974. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/UKZW52100109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f614707edb94525a17bc48cbe340ae5bb43615eee4164f1687c62642ab63439. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/UKZW52100086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc559c7f4207d1c10ddfc840d67b7f69aa0f761d1cce55d6ba831b4f911dfb17. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NL6VE2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcec840e63366aa0ef7556ec0f0a6f6e964b523a180dd85480235ab67bdda0d8b. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/NL6VE2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b624182b5ccc6c24bf559e2e9cc39dcbe95f68ca5138babd97a7da1c7600f09. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NL6VE2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7e036dc8426a87b725888ce1198631c1539c94f1b59ede6eab86a1ebe9bd27. 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/NL6VE2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc559c7f4207d1c10ddfc840d67b7f69aa0f761d1cce55d6ba831b4f911dfb17. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NL6VE2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b9165571bb16f5071d67fee07099d022f083e37789abcbc00538d35e7fbf954. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/UKZW52100069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43b919415b7480903abecd8a1f4f94435d19182dd7639cef5194f823e434d91. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UKZW52100079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2468d36b6e860d3e83ba88a3f07347c7c36d32d3a2eded438fe262090da6cdf0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/UKZW52100084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x318fa74b353a0d202f3818e3aebd1bc449de12e00f49a7e8efb00ad5a70964f4. 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/UKZW52100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x592f561a978e31b2cf6da61bd5e49f2d56a0e640a89f5ddb247e135c09a71660. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/UKZW52100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4239d0406cddc87e089a9e166f0ec8162f1e5c432954e64640b5a3757bc96d79. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBMJG2401672.