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 0x65214e88b47c070eaba8440ab91c8faa1d9cfa20532ace4a24a9d1d979b21eb5. Chain 2 (Bitcoin): anchored in block 953620 (2026-06-14T09:36:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1d47b72a-9156-4acc-9b9e-89d846bfa752.json and https://artists.proofprofile.net/proofs/artist/1d47b72a-9156-4acc-9b9e-89d846bfa752.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bells and Harp Music for Babies and Young Children
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 0x3a215f6daff60dc21ae080c95e0ede2fd520d78819290298f578b704624bddc1. 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/SGB502322681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x913e453131522ab6717e0d68f5925f89e65464ad25bf1048bc9c793ff0859d71. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/SGB502322676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ead4423d0b09219a8588618ae53851bfa94daa9f70c389c593f18cde992389e. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/SGB502322686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b855e2f6f0570b5bbf90809eda7abfe0ffa1f09ca0304b47fa8dfe1cfcebac. 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/SGB502322688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38537191a8acaf81e1865e87ebb107f1102ebe32a3df402934d73b0fa8cbc13. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/SGB502322677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf730a9902133ab8cb5f10cf8200093c59542e556dc7e1bd328a38a8759575aad. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:01:47Z), 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/SGB502322678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa21c64759e4a3c78eb5d0f13af0bb62edd04cafbbc51a56128e96bf1fe8ae17b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/SGB502322680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf783a12eaa3761f98b5635db0862c711c4d651bb1c5a5978fb7a58b8d7479e4d. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/SGB502322687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1c1c793187ad91d0e8f079fc4d07223fee72d4ac58eb916473d99fed47c9e3. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/SGB502322679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6132b8ba208c70af593cec74ea15942138f4ba1e093a5fc8d3b0b1c8528a851. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/SGB502322675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c082aa43c2aa8494654c2065312a400287d8ff8350a2574fbaa0ae54e476b1a. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/SGB502322689.