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 0x3162f5bf6f37e7e1c8312641fe4a45f05e19bb9d080ee5acfc9dcda62b9d7630. 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/b0297ccc-1928-4779-9617-cf89ad5983cb.json and https://artists.proofprofile.net/proofs/artist/b0297ccc-1928-4779-9617-cf89ad5983cb.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 0x7277aacd5261e3863cedcdb85e54eb6b3e4852820c1796b8d37df98f1d98587b. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/CA5KR1930714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a114299fe0c8616ea8adc20d7662c10228451bb2920b2b00da62896c84a0236. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:27:50Z), 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/USLZJ2025179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8b86d3a551b5cf2fc3fd6bd006e826f561d63485978651640870497d7dd150. 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/GBKPL2028705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee79cecd3d8fce62d40fe9c147e3f1ef69d77a94d99ec0ac80e6493ba0dad3ff. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/TCAFI2186272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd64237417fd53a2b28999fb2d4b223b5759e730d813c7f60b7401d24969823f8. 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/TCAFK2143823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6652359d2810f8e6f149d9d6e8c9093bd5d7c834a5fa3134f22bc536407da3f. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/GBKPL2151584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe01174009a9705151028cba6faef2a66e6d3cf2f57970d68be7e37006d4fab98. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GBKPL2278089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec2fd10cc63d3cf702a4c6085bedd2ed2635e0079e7e46d7cdbd17394015d6e. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/GBRKQ2191185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70c0e4005204466da12ac9dd396f48e84bb5d355724a9284fa771ccb00f64a2. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QM42K2254333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2840cb1997202d07d972a664bbed9250199c93b61111368b9a4d6f35037af3. 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/USLZJ2206178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb27d02c46997e56ac035d7b37d79feae9ab7bc1c49880ff2296b7061f0123e0. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USLZJ2206212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe36e24be870dceeaae3d8795628e8a22fa638643e2417701179828581840d26a. 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/GBRKQ2229845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1338960fea091e7b2fa369f8612cebbf765f8f5efbacddcaa8d49f7c38216fe1. 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/QZVEM1880297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd85a6f179b4da0cbf6f8b6d2e0e0d4ce47c02b2f1078a004abc57075ae1864. 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/QZPEW2576852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1338960fea091e7b2fa369f8612cebbf765f8f5efbacddcaa8d49f7c38216fe1. 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/QZVEM1880297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81511e5be2d9372b949109f7d9878b405109951abe99f68d01b7cb2d14cb66d. 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/QT2VB2435432.