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 0x0c976fe8fe45c5865544eac04cd03ba942121bf4b6de96510c9cf11e8c557b40. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bcefb3a4-bceb-4a40-9a20-6ed456f1744b.json and https://artists.proofprofile.net/proofs/artist/bcefb3a4-bceb-4a40-9a20-6ed456f1744b.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 0xbe32d562886ab53d0bbf1e99de242bef96ec1688b40c0feefe41f67375b7e703. 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/USA2B2400232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a82a6ec5501f2e1aa98d067e8c4ced94c52ea25e9bce99c8c95c8c9d601af4. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USA2B2400233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3fb08ffbf95dffed45141413439831c7c57fdf2ef8dab37a47eba2afd586081. 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/USA2B2400234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49100decd78e3cc57cedf4514d781539e126ae0d6098c242207ca223aa1949d8. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/USA2B2400235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8091202ff26f0997067c4962eb9149d7ca74a59984535bf11a58573898dd928d. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/USA2B2400236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2a99b58e349cb6d6daa65e59685805678706fdd9a7ab46c3dc6a0e1e78d54d. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USA2B2400237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec319fda1ef0493edb304d1684d758f8dd9a0a4166dfd1bce73a280b2fcf94d. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/USA2B2400238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9c538a1b47dd9ed59ec605b7dfbae6597061f0c8f5f762c087a505706b5d6c. 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/USA2B2400239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d574bc350a16be64aafd95a82ded3258cf85dc3818ed3af4c85632d80f58be. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T03:17:00Z), 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/USA2B2400240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd836aecd9dcefc47b65e4907acc165c2fe0c06440df93f68981163faa77d6f. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/USA2B2400242.