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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 0x0a4102b12183e79a62e5230e91b776f06625511b1051481832a9d03ff2447097. 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/4f9cd8c9-ef76-48d1-b0b7-7750567fd2c9.json and https://artists.proofprofile.net/proofs/artist/4f9cd8c9-ef76-48d1-b0b7-7750567fd2c9.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 0xd2fde2050423d2eaf16edae46e5051165906f4362f5c18e703f96a6423643251. 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/TCAIH2462529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x032298dbded4df532a81bed2f386d603153dbba08d5e3c4e0db4cc4b0266b512. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/TCAIK2413164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c67a2d9776abf4470a059d2a0efc696ee789a8931e7d43178a3dc162fb026b. 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/TCAIM2404578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93421f9f9ac77d45830e9e2f924b946a5eb7672d0f4dec10dd6c5d4b4b1b97a7. 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/TCAIL2495410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9367641bf2cc229c04f882b5f08b6cf311eeb16280e02f4bc66605ef20bfaca. 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/TCAIV2417931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce1b4b7b8af7f08e475e9fe95a96be9639a275a392011bc29d0cb7feca0f500d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAIX2435125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd85f1959e5e7a0763f9e495c16d174c53983437b4bea2047b511afe7e6487e04. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAIW2499581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e97339bd770923034c94f1ebbd95f6c2cc5f8ba846a76e6f6ceb082940ae8f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAIW2499593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ccfc20b1c92dfcea68c881f57a03a24c4da017bf1645937b5c3d2d847f64c81. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAIW2499598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a18d1bda7736940fec909585ee420df5a6da3b80fef673753205c9dfc559ce. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAIX2499626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1b057fbda4e7db8bf4d63c35b3b16331e0771d0c0b25ffb7ed6ed5cc2f5ae8. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/TCAJA2419583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03fadad685f9e7e73f22c8e8aff9156f7587ec8a9856ea120f4122ed88af5f25. Chain 2 (Bitcoin): anchored in block 957810 (2026-07-13T05:55:46Z), 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/TCAJD2449882.