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 0x4d97670a5aa7fd43cbdfb7d3081c0e4a2026fad58c8750e4e80035b7da9fac29. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7f8b6bb5-8fb5-41c6-883a-2059fef2d8af.json and https://artists.proofprofile.net/proofs/artist/7f8b6bb5-8fb5-41c6-883a-2059fef2d8af.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 0x323900daca7f6babcf40c9e8baf08685d0c4d36fe00cc8a0933ee1349e21bd43. 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/USLZJ2508931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c1f8c6234607ba6b70212f9dd8c1517781ec723e11705f065f7c73edf60823. Chain 2 (Bitcoin): anchored in block 958572 (2026-07-18T15:47:37Z), 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/USLZJ2508951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b5e1c52c9e00029cf3226e251bbc12ad3b997480631a706041fd4dd4083b9e. 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/USLZJ2508958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34454d1249061e561f9f2e5ca02a37d51cfc6141482776ae345e01cb718fef60. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USLZJ2508963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e739823d1f999ffb392b276153bedb6469d98dd8bed4fc6f04c8ad1a7bb919f. 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/USLZJ2508968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4456e3e61b1366611c580bdf2878f71cc7df68b7376067d2705c1847fc4bf059. 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/USLZJ2508970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b44719ccb1640b46a1a74c71748aa7b7a716a25bd8b68f7ecfb3833716c080. 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/USLZJ2508974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9acb0631511192c44244a43357985781dd957809f434e469b366a607348722. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USLZJ2508978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e1b2e0e3ae43101a281d477f571ed8ed148033ff72d68bd809fbd74959609e. 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/USLZJ2508979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1de1185233d274cea4024fa2dc8231ffc515914426883c2842b28c1e01c6ab. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USLZJ2508983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54fdfeaa7e03dbf68263ed71687aff023ea51224008050ba2935e7381230556d. 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/USLZJ2508992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656cf23be6369f218eb28d866389925d37414daa7818a560ba0638820d0501f1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBWUL2571728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b00d6814fb2632a08d168e953d61f7f58cab83f31116e53881d9b260a3d2c63. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/GBWUL2571730.