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 0xba3eefd1a03d5d0563c239f614e22aba3b5104028354ecdffb42b972eb2e33c7. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7422304d-d870-43c7-b7b9-e78782d2f20a.json and https://artists.proofprofile.net/proofs/artist/7422304d-d870-43c7-b7b9-e78782d2f20a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
In Life and Death, Abide With Me, Vol. 1
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 0x49fc6696b60159c638edc6f7dcd5792f588b0c2e1e258ba425a6211ba6313c5b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTAZ2569931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45601a7af2c20e67c38eb277f52beffa4992999524aaba9c643115749e3035ee. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:02:21Z), 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/QZNWY2418477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7004aa7bb56a470a69937c791f95caf037a0fa2d9d685979e4210aae267f77a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTAZ2569932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef429d39595a45d9f6f660ce61cdbf6cb3b6dfa5a9275971c292bb3d9008cad. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZTAZ2569933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd2c853cdf35cdb040d52e9c5aea98ede9af3509c76a7a3d04875d0a129f0d9c. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:37:44Z), 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/QZTAZ2569934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240b24c44a7b430227bd7fbfaf23cca458e96b30d530207f9ee5151bb9dd5f46. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/QZTAZ2569935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02de85b23f8c4b2373f5b12337ff0acb1de3d460b241b8fd9d34c94d6df548b8. 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/QZTAZ2569936.
In Life and Death, Abide With Me, Vol. 2