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 0xa4d737716afc28400cd1bbdecd648ad0030c989ebedc5df8fb5fbf3a8f2c23af. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ba62467f-f2c9-4c81-9f7d-7d38fd6e54de.json and https://artists.proofprofile.net/proofs/artist/ba62467f-f2c9-4c81-9f7d-7d38fd6e54de.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 0x4e48d25d95db06585fa9a37a993c315ba6d95f1988660dbbe6cd52ddb0935caf. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:09:10Z), 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/QZGLS2109925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e48d25d95db06585fa9a37a993c315ba6d95f1988660dbbe6cd52ddb0935caf. 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/QZGLS2109925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f29bc3f923a29d4b195c28af9921d6d75370ad4bdcf235037ede30960a0205. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/ARA502300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd5135b8551175c8e9ab49ee68c4a8586662ce269e61bc47468d7d424f33b5d. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/ARA502300130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9115d41f2750bd2e54863ef9545135e7a50d8d4395424da7a45185e8b0a57baa. 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/ARA502400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad5a75a2eeb9d5f69b86cea4cd8c7c32f234bc17c182c1ae931d09366e339559. 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/ARA502400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc621c189dc034a9a8ed4f0e82e6c777fc02c0a2a9ac6d82ac57c6ed6f91483c1. 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/ARA502400131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9115d41f2750bd2e54863ef9545135e7a50d8d4395424da7a45185e8b0a57baa. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/ARA502400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e04332adf798b83b0bb7dfd5b3bd52c7b50a47072b62736f008947396b2cf94. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/ARA502400107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f39e146dc80cdae912a27e7f4b29cabdd6e80f1ddf7593614003c9a7da326d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:04:31Z), 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/ARA502400133.