ECD may refer to: Early childhood development Endocardial Cushion Defect Heart structural defect Eastern Caribbean dollar Eastern Continental Divide in North America ECD (gene) E. C. Drury Scho
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 0x8043dce994789fd39b488a716ef3005f43bb554128e92f7b2248cfbd6a2ce738. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f4350370-a6cd-491f-8470-5eff833b7595.json and https://artists.proofprofile.net/proofs/artist/f4350370-a6cd-491f-8470-5eff833b7595.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 0xc9c7cbb9073f29abeece854d9a629c29f15a3c6907a3d5bf4834673b50cd463a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/JPP709200047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330118de03bc44b8bc4d8be24075176c474d87a527b852e51cf9216c61fae495. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/JPP709200817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab05f28fe0cf32d3a6b95375a9613afebf5757607587b81fdba3f683aaf16f4. 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/JPP709200824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4593b9051cfd01f7774e74a6f28ac50d084da54c20ad2301629ec32fac4cee4e. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:13:47Z), 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/JPP709200827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb880e2ade4da8097311e1f3ea078c3ffd9c7aec5621f1363d296d3369a6e85e9. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:19:55Z), 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/JPP709300908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a5c193c6ec20cc3c1aa1bd0dd3222260ab9fa90f7d6f6b1612fa03fbfedd09. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T02:09:58Z), 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/JPP709300048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef06791888dfd47c0b13f8b7bab913cb9c3215823863868ced2e95f2af13a96. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/JPV501100344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda3a63576429047fb5b694efbbd07f9727407f904b61f2cd304d78fe3fc3718. 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/JPPO01504693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x063894eea3339f96b1ad5e6b7c404508fcf74b19623f7b0d382f8b1320c4269b. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/JPP709000369.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch