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 0x134223d8c89508b9825b7b0608e589b87d41f0c471a0dc93ce014196add1ec4e. 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/64a45e63-3cfc-44e7-9e66-44ab27174997.json and https://artists.proofprofile.net/proofs/artist/64a45e63-3cfc-44e7-9e66-44ab27174997.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 0xc29503e1756660f947ae18666c76199095ac4fe03fb45bbb7e246e455b483c98. 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/DEP240200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dbc66edeb4a80a9561ebbe4323c1b42e0d27712117faa110de7a864d977a30e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEP240200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb36cff65abf966844182a0e40afa674baff0bdbaf760909d4ada390bfccebaa. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEP240200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25bf75778ca87878fa3c12b14ca2f5a312697bf72a5665767bb6c6c42f863ab. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:53:25Z), 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/DEP240200011.
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82edb209f93b2193fdd320d88f2c6220a1d264cce83cb4258533c9e5edf185e3. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEP240200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad71c1a841ebc062828ccb063380a8cfb51a00453787cda84a59d7664502e518. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/DEP240200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f603e16949d20f462cce2abc7015885c23af7dc4332fbfe57e2b6ffba67225. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DEP240200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a890e38eb3db471052d646790bb361d384b0972afc19025f3735caf9921274. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/DEP240200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf35c61197885eb71edde738ba7fba071d1475a7fc2c3b2de3dd9e32c493360b. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/DEP240200019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb714737b1d6a466413a27ab840a0ea3cd649e59ca9695c0b948449cd466cfc7c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USA560461275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f6d67618f0d315be8dfd98203648078df55e323b8fa2c3468c3248fab934eb. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USA560461272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf3d39189fda2015a79f9d34d41b58df1d37631283cc6a5ad62bfd2cdc8e8a7. 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/USA560461273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc4e1985e40684f34c924420b5523fb941bd320c286ff1a31937ce1638a5a7e8. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USA560461274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2734f184c2f7721225c197d649b678c3bbeecafa273b6fb532168562737f1e8b. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/USA560461276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796eedcf9bbfa21547a52700115aeaa7a9e22c189f14b0464d3dcafc730276ca. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USA560461277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e5ca8247be3b4ff3f222e7481de3713ca2a27d6f804d1191e12633669ae70f2. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USA560461278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36723b77eb34ecf9bcc9cf87d2b94388c1ec7fb31b661d7b4add2888c71f2358. 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/USA560461279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cea92402fc1c4795daf7ef75af68eed63feb40585874510f72dae917cd7f4a2. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USA560461280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8698fd2033834ed78409883c51f04ad7d569c9cf05bd86fe9a312c11c559a7. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/USA560461281.