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 0xcf1d19d956c5a0ad7dd5074d708050a30bd614896cd501ac51740143a5b35145. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e9293fc3-f6bb-4b67-9e1e-e56a8952e5d9.json and https://artists.proofprofile.net/proofs/artist/e9293fc3-f6bb-4b67-9e1e-e56a8952e5d9.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 0x33291add8f890317cf169f61aa8be9960dda10ac2fc3458deaf25a8ce1b3ce69. Chain 2 (Bitcoin): anchored in block 956485 (2026-07-03T10:53:04Z), 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/QZHNA2339800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d68a9f27ca04283acb95b31fef70241f1296e1b228b0cec34834f3a78dc715. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZHNA2339801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd9b3db80f369cc5001c20412a97658db63e2a07bba6d4a1c8f09b1927fda4e. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/QZHNA2339803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a2afb80734a5ad53cc15419b9c5728d8e0d024f02c8442f8b77f360a689433. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:10:58Z), 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/QZHNA2339804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95119ac0d55ae5e78289e3a0f757c1dfd46bec135784a64009b046605001488e. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QZHNA2339805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0304888fff8155ca190aeeb0a7bb7e3e38b5a73e2908b5d53061d83dbe0596f2. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHNA2339806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575cf66035eaa068d41cc3133ead58f7bb9ed316da3dc45dbeac3e60d6b99d96. 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/QZHNA2339807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05f303e2e03a6188618dfe0572c299e65f3ec4af006ad063977e28017a426bd. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T08:39:27Z), 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/QZHNA2339808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc71e7edaef4a1c7aadc0bab7e61754b8f048330d036b7b1b35f55120c418502. 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/QZMER2323946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd93b232d702828a74f2a000b9d548a7db9bdb53ee31f17c879fe88c2d2bed30d. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:28:03Z), 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/QZMER2323947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb619522a31bc2050c2fb01ea136cf8221867807421f94e4873b6e1fa6f36c9da. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZMER2323948.