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 0x45c4e179f629a51f2e46ad0def6b8d6aeb9f6eb374900b52801a9825876d6361. 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/73f67414-414f-4d42-a643-eb67d0cb6208.json and https://artists.proofprofile.net/proofs/artist/73f67414-414f-4d42-a643-eb67d0cb6208.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 0x130b5dbfc6058581501cc703c62cf306c2a4d0392a8aee798539f19b40ef3200. 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/DECW61700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5adb277d29b20d90f84dc82e522732d18cc1ef0bc6c488543f32bee4066c0a05. 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/DECW62200028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84cc16c78a27f3db2b238153587006b33573735ab266bc6526d23245f5e33ca. 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/DECW62200030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928b54c2f2af8834cd976d00bce1c5457ee7c2ac30ae8b57195391ab43401e3d. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:08:40Z), 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/SEWJN2500202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfefdd4021ea1c2b6271e18fe437970be660a6339a67634abce549effab0975ed. 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/SEWJN2500205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d5d6eaeae4067ab9a90335bd5a3d7a742972a01dd1ba410580c3a1f331825ab. 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/SEWJN2500201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928b54c2f2af8834cd976d00bce1c5457ee7c2ac30ae8b57195391ab43401e3d. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/SEWJN2500202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed298d948db2fe84b7ffd74c35620f6bdb8f332b5f3149aa2b3045116e27da0c. 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/SEWJN2500204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfefdd4021ea1c2b6271e18fe437970be660a6339a67634abce549effab0975ed. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/SEWJN2500205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f458c3493b257b48bd6e1fd82d95da1e384de6d9993d50ec72b8059595461b5. 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/DES291900055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e58f353809f8a962950681aff8d80b6968ab3c6146feb3cd9fa3f39ab8c59a. 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/FIECL2400029.